Abstract
A frequency division multiplexing wireless transmission on two or more antennas with the set of symbols on subcarriers of a burst transmitted by one antenna transformed into another set of symbols on the subcarriers for the corresponding burst transmitted by another antenna. This helps overcome fading of the wireless channel by diversity.
Technologies
Signal Processing
Product
Use Cases
Wireless communication
Services
Claim
1. A method of transmission, comprising:
(a) providing a set of N symbols where N is an integer greater than 1;
(b) providing Mâx88x921 transformations of said set of N symbols where M is an integer greater than 1;
(c) transmitting said set of N symbols on N subcarriers in a burst from a first antenna; and
(d) transmitting, simultaneously set of N symbols, each of said Mâx88x921 transformations of set of N symbols on N subcarriers in a burst from a corresponding one of Mâx88x921 antennas.', '(a) providing a set of N symbols where N is an integer greater than 1;', '(b) providing Mâx88x921 transformations of said set of N symbols where M is an integer greater than 1;', '(c) transmitting said set of N symbols on N subcarriers in a burst from a first antenna; and', '(d) transmitting, simultaneously set of N symbols, each of said Mâx88x921 transformations of set of N symbols on N subcarriers in a burst from a corresponding one of Mâx88x921 antennas.
2. The method of claim 1, wherein:
(a) said set of N symbols includes pilot symbols and data symbols.', '(a) said set of N symbols includes pilot symbols and data symbols.
3. The method of claim 2, wherein:
(a) M equals 2; and
(b) said Mâx88x921 transformations includes a pairwise rotation and complex conjugation of two of said set of N symbols.', '(a) M equals 2; and', '(b) said Mâx88x921 transformations includes a pairwise rotation and complex conjugation of two of said set of N symbols.
4. The method of claim 3, wherein:
(a) said symbols are QAM symbols.', '(a) said symbols are QAM symbols.
5. The method of claim 2, wherein:
(a) N equals 64; and
(b) 48 of said N symbols are data symbols.', '(a) N equals 64; and', '(b) 48 of said N symbols are data symbols.
6. The method of claim 4, wherein:
(a) said set of N symbols is partitioned into N/2 pairs of symbols (ai, bi); and
(b) said Mâx88x921 transformation transforms the pairs (ai, bi) into the pairs (âx88x92bi *, ai *).', '(a) said set of N symbols is partitioned into N/2 pairs of symbols (ai, bi); and', '(b) said Mâx88x921 transformation transforms the pairs (ai, bi) into the pairs (âx88x92bi *, ai *).
7. A method of transmission, comprising:
(a) providing first and second sets of N symbols where N is an integer greater than 1;
(b) providing Mâx88x921 transformations of said first set of N symbols and said second set of N symbols where M is an integer greater than 1;
(c) transmitting said first and second sets of N symbols on N subcarriers in a first and a second burst from a first antenna; and
(d) transmitting, simultaneously set of N symbols, each of said Mâx88x921 transformations of sets of N symbols on N subcarriers in a pair of bursts from a corresponding one of Mâx88x921 antennas.', '(a) providing first and second sets of N symbols where N is an integer greater than 1;', '(b) providing Mâx88x921 transformations of said first set of N symbols and said second set of N symbols where M is an integer greater than 1;', '(c) transmitting said first and second sets of N symbols on N subcarriers in a first and a second burst from a first antenna; and', '(d) transmitting, simultaneously set of N symbols, each of said Mâx88x921 transformations of sets of N symbols on N subcarriers in a pair of bursts from a corresponding one of Mâx88x921 antennas.
8. The method of claim 7, wherein:
(a) each set of N symbols includes pilot symbols and data symbols.', '(a) each set of N symbols includes pilot symbols and data symbols.
9. The method of claim 8, wherein:
(a) M equals 2; and
(b) said Mâx88x921 transformations includes a pairwise rotation and complex conjugation of two of said set of N symbols.', '(a) M equals 2; and', '(b) said Mâx88x921 transformations includes a pairwise rotation and complex conjugation of two of said set of N symbols
10. The method of claim 9, wherein:
(a) said symbols are QAM symbols.', '(a) said symbols are QAM symbols
11. The method of claim 8, wherein:
(a) N equals 64; and
(b) 48 of said N symbols are data symbols.', '(a) N equals 64; and', '(b) 48 of said N symbols are data symbols
12. The method of claim 10, wherein:
(a) each set of N symbols is partitioned into N/2 pairs of symbols (ai, bi); and
(b) said Mâx88x921 transformation transforms the pairs (ai, bi) into the pairs (âx88x92bi*, ai*).', '(a) each set of N symbols is partitioned into N/2 pairs of symbols (ai, bi); and', '(b) said Mâx88x921 transformation transforms the pairs (ai, bi) into the pairs (âx88x92bi*, ai*).']
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SUMMARY
ClaimChart-US7149253B2-STO
Patent number:US7149253B2
Claim Chart Type : SEP Claim Chart
Price: 200 €
Note:
The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.