1. A base station comprising:
a transmit path circuitry configured to:
scramble cyclic redundancy check (CRC) bits of a downlink control information (DCI) format using a cell radio network temporary identifier (C-RNTI) for dynamic scheduling, and scramble the CRC bits of the DCI format using a semi-persistent scheduling (SPS) C-RNTI for semi-persistent scheduling;
if C-RNTI is used to scramble the CRC bits,
generate a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity scheme or a single-layer beamforming scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and
generate a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain; and

if SPS C-RNTI is used to scramble the CRC bits,
generate a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and
generate a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain.', 'a transmit path circuitry configured to:
scramble cyclic redundancy check (CRC) bits of a downlink control information (DCI) format using a cell radio network temporary identifier (C-RNTI) for dynamic scheduling, and scramble the CRC bits of the DCI format using a semi-persistent scheduling (SPS) C-RNTI for semi-persistent scheduling;
if C-RNTI is used to scramble the CRC bits,
generate a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity scheme or a single-layer beamforming scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and
generate a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain; and

if SPS C-RNTI is used to scramble the CRC bits,
generate a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and
generate a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain.', 'scramble cyclic redundancy check (CRC) bits of a downlink control information (DCI) format using a cell radio network temporary identifier (C-RNTI) for dynamic scheduling, and scramble the CRC bits of the DCI format using a semi-persistent scheduling (SPS) C-RNTI for semi-persistent scheduling;', 'if C-RNTI is used to scramble the CRC bits,
generate a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity scheme or a single-layer beamforming scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and
generate a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain; and', 'generate a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity scheme or a single-layer beamforming scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and', 'generate a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain; and', 'if SPS C-RNTI is used to scramble the CRC bits,
generate a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and
generate a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain.', 'generate a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmit the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and', 'generate a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmit the downlink transmission grant in a user equipment-specific search space of the CCE domain.

2. A base station in accordance with claim 1 wherein the fallback format is further defined as DCI format 1A according to 3rd Generation Partnership Project (3GGP) standards.

3. A base station in accordance with claim 1 wherein the dual-layer beamforming format is further defined a modified DCI format 2A according to 3rd Generation Partnership Project (3GGP) standards.

4. A base station in accordance with claim 1 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the base station is further configured to generate a value in a new data indicator field of the dual-layer beamforming format that corresponds to a DRS port index of an enabled transport block in the downlink transmission grant.

5. A base station in accordance with claim 1 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the base station is further configured to generate a value in a new data indicator field of the dual-layer beamforming format that corresponds to a DRS port index of an enabled codeword in the downlink transmission grant.

6. A method of operating a base station, the method comprising:
scrambling cyclic redundancy check (CRC) bits of a downlink control information (DCI) format using a cell radio network temporary identifier (C-RNTI) for dynamic scheduling, and scrambling the CRC bits of the DCI format using a semi-persistent scheduling (SPS) C-RNTI for semi-persistent scheduling;
if C-RNTI is used to scramble the CRC bits,
generating a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity transmission scheme or a single-layer beamforming scheme, and transmitting the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and
generating a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a user equipment-specific search space of the CCE domain; and

if SPS C-RNTI is used to scramble the CRC bits,
generating a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and
generating a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a user equipment-specific search space of the CCE domain.', 'scrambling cyclic redundancy check (CRC) bits of a downlink control information (DCI) format using a cell radio network temporary identifier (C-RNTI) for dynamic scheduling, and scrambling the CRC bits of the DCI format using a semi-persistent scheduling (SPS) C-RNTI for semi-persistent scheduling;', 'if C-RNTI is used to scramble the CRC bits,
generating a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity transmission scheme or a single-layer beamforming scheme, and transmitting the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and
generating a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a user equipment-specific search space of the CCE domain; and', 'generating a downlink transmission grant using the DCI format being a fallback format to indicate a transmit diversity transmission scheme or a single-layer beamforming scheme, and transmitting the downlink transmission grant in a common or user equipment-specific search space of a control channel (CCE) domain, and', 'generating a downlink transmission grant using the DCI format being a dual-layer beamforming format to indicate a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a user equipment-specific search space of the CCE domain; and', 'if SPS C-RNTI is used to scramble the CRC bits,
generating a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and
generating a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a user equipment-specific search space of the CCE domain.', 'generating a downlink transmission grant using the DCI format being the fallback format to indicate a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a common or user equipment-specific search space of the CCE domain, and', 'generating a downlink transmission grant using the DCI format being the dual-layer beamforming format to indicate a dual-DRS port transmission scheme or a single-DRS port transmission scheme, and transmitting the downlink transmission grant in a user equipment-specific search space of the CCE domain.', '7. A method in accordance with claim 6 wherein the fallback format is further defined as DCI format 1A according to 3rd Generation Partnership Project (3GGP) standards.', '8. A method in accordance with claim 6 wherein the dual-layer beamforming format is further defined a modified DCI format 2A according to 3rd Generation Partnership Project (3GGP) standards.', '9. A method in accordance with claim 6 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the method further comprises generating a value in a new data indicator field of the dual-layer beamforming format that corresponds to a DRS port index of an enabled transport block in the downlink transmission grant.', '10. A method in accordance with claim 6 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the method further comprises generating a value in a new data indicator field of the dual-layer beamforming format that corresponds to a DRS port index of an enabled codeword in the downlink transmission grant.', '11. A subscriber station comprising:
a receive path circuitry configured to:
receive a downlink transmission grant from a base station;
de-scramble cyclic redundancy check (CRC) bits of the downlink transmission grant using a cell radio network temporary identifier (C-RNTI) key, and de-scramble the CRC bits of the downlink transmission grant using a semi-persistent scheduling (SPS) C-RNTI key;
if the C-RNTI key successfully de-scrambles the CRC bits, determine if the downlink transmission grant utilizes a downlink control information (DCI) format being a fallback format or a dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and

if the SPS C-RNTI key successfully de-scrambles the CRC bits, determine if the downlink transmission grant utilizes a DCI format being the fallback format or the dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a single-DRS port transmission scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', 'a receive path circuitry configured to:
receive a downlink transmission grant from a base station;
de-scramble cyclic redundancy check (CRC) bits of the downlink transmission grant using a cell radio network temporary identifier (C-RNTI) key, and de-scramble the CRC bits of the downlink transmission grant using a semi-persistent scheduling (SPS) C-RNTI key;
if the C-RNTI key successfully de-scrambles the CRC bits, determine if the downlink transmission grant utilizes a downlink control information (DCI) format being a fallback format or a dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and

if the SPS C-RNTI key successfully de-scrambles the CRC bits, determine if the downlink transmission grant utilizes a DCI format being the fallback format or the dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a single-DRS port transmission scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', 'receive a downlink transmission grant from a base station;', 'de-scramble cyclic redundancy check (CRC) bits of the downlink transmission grant using a cell radio network temporary identifier (C-RNTI) key, and de-scramble the CRC bits of the downlink transmission grant using a semi-persistent scheduling (SPS) C-RNTI key;', 'if the C-RNTI key successfully de-scrambles the CRC bits, determine if the downlink transmission grant utilizes a downlink control information (DCI) format being a fallback format or a dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and', 'if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and', 'if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and', 'if the SPS C-RNTI key successfully de-scrambles the CRC bits, determine if the downlink transmission grant utilizes a DCI format being the fallback format or the dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a single-DRS port transmission scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', 'if the downlink transmission grant utilizes a DCI format being the fallback format, determine that a single-DRS port transmission scheme is used by the base station, and', 'if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determine that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', '12. A subscriber station in accordance with claim 11 wherein the fallback format is further defined as DCI format 1A according to 3rd Generation. Partnership Project (3GGP) standards.', '13. A subscriber station in accordance with claim 11 wherein the dual-layer beamforming format is further defined a modified DCI format 2A according to 3rd Generation Partnership Project (3GGP) standards.', '14. A subscriber station in accordance with claim 11 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the subscriber station is further configured to determine a DRS port index of an enabled transport block in the downlink transmission grant using a value in a new data indicator field of the dual-layer beamforming format.', '15. A subscriber station in accordance with claim 11 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the subscriber station is further configured to determine a DRS port index of an enabled codeword in the downlink transmission grant using a value in a new data indicator field of the dual-layer beamforming format.', '16. A method of operating a subscriber station, the method comprising:
receiving a downlink transmission grant from a base station;
de-scrambling cyclic redundancy check (CRC) bits of the downlink transmission grant using a cell radio network temporary identifier (C-RNTI) key, and de-scrambling the CRC bits of the downlink transmission grant using a semi-persistent scheduling (SPS) C-RNTI key;
if the C-RNTI key successfully de-scrambles the CRC bits, determining if the downlink transmission grant utilizes a downlink control information (DCI) format being a fallback format or a dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determining that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and
if the downlink transmission grant utilizes a downlink control information (DCI) format being the dual-layer beamforming format, determining that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and

if the SPS C-RNTI key successfully de-scrambles the CRC bits, determining if the downlink transmission grant utilizes a DCI format being the fallback format or the dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determining that a single-DRS port transmission scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determining that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', 'receiving a downlink transmission grant from a base station;', 'de-scrambling cyclic redundancy check (CRC) bits of the downlink transmission grant using a cell radio network temporary identifier (C-RNTI) key, and de-scrambling the CRC bits of the downlink transmission grant using a semi-persistent scheduling (SPS) C-RNTI key;', 'if the C-RNTI key successfully de-scrambles the CRC bits, determining if the downlink transmission grant utilizes a downlink control information (DCI) format being a fallback format or a dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determining that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and
if the downlink transmission grant utilizes a downlink control information (DCI) format being the dual-layer beamforming format, determining that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and', 'if the downlink transmission grant utilizes a DCI format being the fallback format, determining that a transmit diversity transmission scheme or a single-layer beamforming scheme is used by the base station, and', 'if the downlink transmission grant utilizes a downlink control information (DCI) format being the dual-layer beamforming format, determining that a dual-dedicated reference signal (DRS) port transmission scheme or a single-DRS port transmission scheme is used by the base station; and', 'if the SPS C-RNTI key successfully de-scrambles the CRC bits, determining if the downlink transmission grant utilizes a DCI format being the fallback format or the dual-layer beamforming format;
if the downlink transmission grant utilizes a DCI format being the fallback format, determining that a single-DRS port transmission scheme is used by the base station, and
if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determining that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', 'if the downlink transmission grant utilizes a DCI format being the fallback format, determining that a single-DRS port transmission scheme is used by the base station, and', 'if the downlink transmission grant utilizes a DCI format being the dual-layer beamforming format, determining that a dual-DRS port transmission scheme or a single-DRS port transmission scheme is used by the base station.', '17. A method in accordance with claim 16 wherein the fallback format is further defined as DCI format 1A according to 3rd Generation Partnership Project (3GGP) standards.', '18. A method in accordance with claim 16 wherein the dual-layer beamforming format is further defined as a modified DCI format 2A according to 3rd Generation Partnership Project (3GGP) standards.', '19. A method in accordance with claim 16 wherein if the dual-layer beamforming format is used, to indicate a single-DRS port transmission scheme, the method further comprises determining a DRS port index of an enabled transport block in the downlink transmission grant using a value in a new data indicator field of the dual-layer beamforming format.

20. A method in accordance with claim 16 wherein if the dual-layer beamforming format is used to indicate a single-DRS port transmission scheme, the method further comprises determining a DRS port index of an enabled codeword in the downlink transmission grant using a value in a new data indicator field of the dual-layer beamforming format.']