Method and apparatus for weighted non-binary repeat accumulate coding and space-time coding
First Claim
1. A mobile communication system using multiple antennas comprising:
- a repeater for receiving non-binary symbols and repeating the non-binary symbols;
a weighter for weighting the repeated non-binary symbols by multiplying the identical repeated non-binary symbols by corresponding different weighting factors;
an interleaver for interleaving the weighted non-binary symbols; and
a coder for coding the interleaved symbols;
wherein a plurality of binary bits are represented by the non-binary symbol, the repeater repeats the symbols by a repetition factor determined by a data rate of the communication system and a number of the antennas, and a number of the corresponding different weighting factors is equal to the repetition factor.
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Abstract
An apparatus and method for weighted non-binary RA coding and space-time coding are disclosed. Transmission data is divided in the units of frames each having mN bits, and each frame is further segmented into N blocks, each block containing m bits. The N blocks are converted to N non-binary GF(2m) elements. These N non-binary symbols are repeated by a repetition factor r. The rN symbols are multiplied by weighting factors being GF(2m) elements other than zero. The rN weighted symbols are interleaved and accumulated. The rN accumulated symbols are transmitted to a receiver, or each of the rN accumulated symbols is demapped to m bits prior to transmission. Therefore, information can be transmitted reliably in a wireless communication system.
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Citations
36 Claims
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1. A mobile communication system using multiple antennas comprising:
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a repeater for receiving non-binary symbols and repeating the non-binary symbols; a weighter for weighting the repeated non-binary symbols by multiplying the identical repeated non-binary symbols by corresponding different weighting factors; an interleaver for interleaving the weighted non-binary symbols; and a coder for coding the interleaved symbols; wherein a plurality of binary bits are represented by the non-binary symbol, the repeater repeats the symbols by a repetition factor determined by a data rate of the communication system and a number of the antennas, and a number of the corresponding different weighting factors is equal to the repetition factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A coding method for use in a mobile communication system using multiple antennas, the method comprising the steps of:
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receiving non-binary symbols and repeating the non-binary symbols; weighting the identical repeated non-binary symbols by multiplying the repeated non-binary symbols by corresponding different weighting factors; interleaving the weighted non-binary symbols; and coding the interleaved symbols, wherein a plurality of binary bits are represented by a non-binary symbol, the symbols are repeated by a repetition factor determined by a data rate of the communication system and a number of the antennas, and a number of the corresponding different weighting factors is equal to the repetition factor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A mobile communication system using multiple antennas comprising:
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a repeater for receiving symbols and repeating the symbols; a weighter for weighting the repeated symbols by multiplying the identical repeated symbols by corresponding different weighting factors; an interleaver for interleaving the weighted symbols; and a coder for coding the interleaved symbols, wherein a plurality of binary bits are represented by a non-binary symbol, the repeater repeats the symbols by a repetition factor determined by a data rate of the communication system and a number of the antennas, and a number of the corresponding different weighting factors is equal to the repetition factor, wherein the mobile communication system further comprises a mapper for mapping the plurality of binary bits to the non-binary element over a Galois Field, GF2m, where m is the number of binary bits mapped to the non-binary element, and a demapper for mapping the encoded non-binary symbols to the plurality of binary bits. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A method for use in a mobile communication system using multiple antennas, the method comprising the steps of:
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receiving symbols and repeating the symbols; weighting the identical repeated symbols by multiplying the repeated symbols by corresponding different weighting factors; interleaving the weighted symbols; and coding the interleaved symbols, wherein a plurality of binary bits are represented by a non-binary symbol, the symbols are repeated by a repetition factor determined by a data rate of the communication system and a number of the antennas, and a number of the corresponding different weighting factors is equal to the repetition factor, wherein the method further comprises the steps of;
mapping the plurality of binary bits to a non-binary element over a Galois Field, GF2m, wherein m is the number of binary bits mapped to the non-binary element; and
demapping the encoded non-binary symbols to the plurality of binary bits. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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Specification