Abstract
A transmitter employing an OFDM system including a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers modulated by a data symbol or a known symbol a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter and a scheduling portion which determines an existence of phase rotation.
SEP Database
Augmented SEP Database
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| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 4G | 04/07/2013 | ISLD-201307-002 | HUAWEI |
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| Not Available | 04/07/2013 | ISLD-201307-002 | HUAWEI |
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| All Granted Patents In Patent Family : | ---- |
| All Pending Patents In Patent Family : | ---- |
SEP Database
Augmented SEP Database
There is no augmented declaration available yet
| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| WO2007049768A1 | 4G | 04/07/2013 | ISLD-201307-002 | HUAWEI |
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| WO2007049768A1 | 5G | 26/08/2020 | ISLD-202008-012 | SHARP CORPORATION |
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| US2009129492A1 | 4G | 04/07/2013 | ISLD-201307-002 | HUAWEI |
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| CN101667988A | 4G | 04/07/2013 | ISLD-201307-002 | HUAWEI |
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| CN101707581A | 5G | 26/08/2020 | ISLD-202008-012 | SHARP CORPORATION |
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
| ----- | ----- | ----- | ----- | ----- |
S1
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----- | ----- | ----- | ----- | |||
Technologies
Multiple-Input Multiple-Output(MIMO)/Massive MIMO
Product
Not Available
Use Cases
Wireless communication
Services
Not Available
Claim
1. A transmitter employing an OFDM system, comprising:
a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter; and
an allocating portion which allocates a plurality of groups to a receiver,
wherein the same phase rotation amount given to a first group configured with a plurality of consecutive subcarriers is a phase rotation amount equal to zero.', 'a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;', 'a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter; and', 'an allocating portion which allocates a plurality of groups to a receiver,', 'wherein the same phase rotation amount given to a first group configured with a plurality of consecutive subcarriers is a phase rotation amount equal to zero.
2. A transmitter employing an OFDMA system which uses a frequency band that is constituted by a plurality of subchannels, comprising:
a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter; and
a scheduling portion which sorts a data to a subchannel and determines an existence of the phase rotation.', 'a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;', 'a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter; and', 'a scheduling portion which sorts a data to a subchannel and determines an existence of the phase rotation.
3. The transmitter according to claim 1 or 2, wherein the group includes a subcarrier modulated by a known signal for estimating a propagation path.
4. The transmitter according to claim 1 or 2, wherein a number of subcarriers included in the group is same in all frequency bands.
5. The transmitter according to claim 1 or 2, wherein the phase rotating portion makes a difference of the phase rotation amount given to each group between adjacent groups being constant.
6. The transmitter according to claim 5, wherein the phase rotating portion takes one of groups as a reference group and determines an absolute value of the phase rotation amount of the reference group based on a state of a receiver.
7. The transmitter according to claim 1 or 2, wherein the phase rotating portion makes a difference of phase rotation amounts between groups being a unique value in each transmitter.
8. The transmitter according to claim 1 or 2, wherein subcarrier modulation which needs an orthogonal relationship between subcarriers generating the group is performed.
9. The transmitter according to claim 8, wherein the orthogonal relationship is an orthogonal relationship of a subcarrier for propagation path estimation
10. A communication system that performs communication between the transmitter according to claim 9 and a receiver employing an OFDM system, wherein the receiver comprises:
an FFT portion which performs frequency conversion by an FFT on received OFDM symbol in which known symbol is contained;
a propagation path estimating portion which estimates with respect to a plurality of transmitting antennas a propagation path that is the frequency response with a transmitting antenna in units of the subcarrier for propagation path estimation that maintains orthogonality on the transmitter side;
a quality estimating portion which estimates a quality of radio wave with respect to each transmitting antenna; and
a quality calculating portion which calculates a quality of combined propagation path in case of providing a predetermined phase rotation to a subcarrier of the OFDM symbol that is transmitted from each transmitting antenna from the frequency response of each transmitting antenna.', 'an FFT portion which performs frequency conversion by an FFT on received OFDM symbol in which known symbol is contained;', 'a propagation path estimating portion which estimates with respect to a plurality of transmitting antennas a propagation path that is the frequency response with a transmitting antenna in units of the subcarrier for propagation path estimation that maintains orthogonality on the transmitter side;', 'a quality estimating portion which estimates a quality of radio wave with respect to each transmitting antenna; and', 'a quality calculating portion which calculates a quality of combined propagation path in case of providing a predetermined phase rotation to a subcarrier of the OFDM symbol that is transmitted from each transmitting antenna from the frequency response of each transmitting antenna
11. A transmission method employing an OFDM system, comprising the steps of:
giving a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
determining the phase rotation amount for each antenna set or each transmitter, wherein the same phase rotation amount given to a first group configured with a plurality of consecutive subcarriers is a phase rotation amount equal to zero;
allocating a plurality of groups to a receiver; and
transmitting signal added with the phase rotation in addition to modulation.', 'giving a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;', 'determining the phase rotation amount for each antenna set or each transmitter, wherein the same phase rotation amount given to a first group configured with a plurality of consecutive subcarriers is a phase rotation amount equal to zero;', 'allocating a plurality of groups to a receiver; and', 'transmitting signal added with the phase rotation in addition to modulation
12. A transmission method employing an OFDMA system, comprising the steps of:
giving a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
determining the phase rotation amount for each antenna set or each transmitter;
determining an existence of a phase rotation; and
transmitting signal added with the existence of the phase rotation to the modulation and the phase rotation.', 'giving a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;', 'determining the phase rotation amount for each antenna set or each transmitter;', 'determining an existence of a phase rotation; and', 'transmitting signal added with the existence of the phase rotation to the modulation and the phase rotation
13. The transmission method according to claim 11 or 12, wherein a criterion for grouping is an orthogonality of the subcarrier
14. The transmission method according to claim 13, wherein the orthogonality is an orthogonality of a subcarrier for propagation path estimation.']
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