Abstract
Enhanced performance is realized in a wireless transmission arrangement that is subject to fading by employing a perspective that combines array signal processing with channel coding. Specifically, in accordance with our invention, antennas at the transmitter are partitioned into small groups, and individual space-time codes are used to transmit information from each group of antennas. At the receiver, an individual space-time code is decoded by a linear array processing technique that suppresses signals transmitted by other groups of antennas by treating them as interference.
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Claim
1. A method for transmitting signal over n antennas comprising the steps of:partitioning the antennas into q groups, where each group has nk antennas, where at least for some value of k nk âx89§2, and ##EQU10## partitioning a frame of bits into q bit-groups of B bits each, where each bit-group has Bk bits and ##EQU11## encoding each bit-group of Bk bits with coder Ck to develop nk symbols; and transmitting the nk symbols over respective one of said nk antennas.', 'partitioning the antennas into q groups, where each group has nk antennas, where at least for some value of k nk âx89§2, and ##EQU10## partitioning a frame of bits into q bit-groups of B bits each, where each bit-group has Bk bits and ##EQU11## encoding each bit-group of Bk bits with coder Ck to develop nk symbols; and', 'transmitting the nk symbols over respective one of said nk antennas.
2. The method of claim 1 where said Ck is a component code of a product code C1 Ãx97C2 Ãx97, . . . , Ãx97Cq.
4. A method for decoding signals received over m receiving antennas comprising the steps of:receiving a signal at each of the receiving antenna, partitioning the m receiving antennas into q groups, decoding the signals received by the antennas of a group k with code Ck, where codes C1, C2, . . . ,Cq for component codes of a product code C1 Ãx97C2 Ãx97, . . . , Ãx97Cq, while suppressing signals from other component codes.', 'receiving a signal at each of the receiving antenna,', 'partitioning the m receiving antennas into q groups,', 'decoding the signals received by the antennas of a group k with code Ck, where codes C1, C2, . . . ,Cq for component codes of a product code C1 Ãx97C2 Ãx97, . . . , Ãx97Cq, while suppressing signals from other component codes.
5. The method of claim 4 where the signal received at each of the receiving antennas corresponds to a collection of signals transmitted from q groups of transmitting antennas, and where group k of transmitting antennas transmits nk symbols that result from encoding a block of Bk bits with a coder employing code Ck.
6. The method of claim 4 where said decoding for receiving antenna group k is independent of decoding for receiving antenna group jâx89xa0k.
7. The method of claim 4 where said decoding for receiving antenna group k is responsive to outputs decoded for receiving antenna groups j
8. The method of claim 7 where, in decoding for receiving antenna group k, the contribution to the signal received at the antennas of group k from signal decoded for receiving antenna groups j
9. A transmitter comprising:means for partitioning an applied frame of B bits into q bit-groups where bit-group k has Bk bits and ##EQU12## q encoders, with encoder k, k=1,2, . . . ,q, being responsive to bit-group k, where the encoder k encodes the Bk bits into nk symbols; and means for transmitting each of the symbols developed by said q encoders out of n transmitting antennas, where ##EQU13##10.', 'means for partitioning an applied frame of B bits into q bit-groups where bit-group k has Bk bits and ##EQU12## q encoders, with encoder k, k=1,2, . . . ,q, being responsive to bit-group k, where the encoder k encodes the Bk bits into nk symbols; and', 'means for transmitting each of the symbols developed by said q encoders out of n transmitting antennas, where ##EQU13##10
10. The transmitter of claim 9 where said q encoders develop n symbols and the n-th symbol is transmitted by the n-th transmitting antenna
11. The transmitter of claim 10 where the n symbols are transmitted out of the n transmitting antennas simultaneously
12. The transmitter of claim 9 where said means for transmitting includes a modulator
13. The transmitter of claim 9 where each of said q encoders employs an encoding code Ck that is a component code of a product code C1 Ãx97C2 Ãx97, . . . , Ãx97Cq
14. The transmitter of claim 13 where each code said Ck is a trellis code
15. A receiver comprising: in antennas coupled to m receivers,q processing units, each coupled to mk of said receivers, where mk is an integer such that ##EQU14## and means for combining output signals decoded by said q processing units.', 'q processing units, each coupled to mk of said receivers, where mk is an integer such that ##EQU14## and means for combining output signals decoded by said q processing units
16. The receiver of claim 15 where each of said processing unit includes a decoder employing a codeCk that is a component code of a product code C1 Ãx97C2 Ãx97, . . . , Ãx97Cq
17. The receiver of claim 15 where processing unit k subtracts a computed contribution to signals received at antennas coupled to said processing unit k of signals detected by processing units j
19. A method for transmitting signal over n antennas comprising the steps of:in response to an applied frame of signals, developing q streams of codewords, where q is less than n, where the streams of codewords are independent of each other, and where the codewords within a stream are correlated to each other; and transmitting the S streams of codewords over said n antennas.', 'in response to an applied frame of signals, developing q streams of codewords, where q is less than n, where the streams of codewords are independent of each other, and where the codewords within a stream are correlated to each other; and', 'transmitting the S streams of codewords over said n antennas.
20. The method of claim 19 where each stream of codewords k is transmitted by a group of said antennas having nk antennas and ##EQU15##']
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SUMMARY
ClaimChart-US6127971A-STO
Patent number:US6127971A
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.