Apparatus and methods for jointly decoding messages based on apriori knowledge of modified codeword transmission
First Claim
1. A method of operating a receiver comprising:
- receiving a first codeword of a first message as part of a first transmission, the first message corresponding to data prior to being encoded for transmission;
receiving a second codeword of a second message as part of a second transmission, the second message corresponding to the data prior to being encoded for transmission, the second message having a known difference from said first message, where said difference includes a value which changes between the first message and the second message;
hypothesizing said difference in the value which changes between said first message and said second message, wherein hypothesizing said difference includes hypothesizing that at least one bit is different between said first message and said second message;
determining a hypothesized difference between the first codeword and the second codeword, based upon the hypothesized difference between the first message and the second message; and
jointly decoding the first codeword of the first message and the second codeword of the second message utilizing said determined hypothesized difference between the first codeword and the second codeword.
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Accused Products
Abstract
A method and apparatus for jointly decoding a first and second message is disclosed. The signaling scenario illustrated by FIG. 1 and using the codeword properties defined herein, the various embodiments may combine multiple messages under the hypothesis that the value of a message portion corresponding any subsequent observed transmission is different. Accordingly a first buffer may store the first observed message frame (509) and a second buffer may sum the LLR'"'"'s of subsequent observed frames (513).
In the embodiments disclosed, two decoding hypotheses are required only; a first where the two buffers are combined directly (513) and a second where the difference codeword bit LLR'"'"'s of the first buffer (509) are inverted before combining with those of the second buffer (519). A maximum of N transmissions is allowed by the receiver (523), after which a decoding failure is declared.
48 Citations
19 Claims
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1. A method of operating a receiver comprising:
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receiving a first codeword of a first message as part of a first transmission, the first message corresponding to data prior to being encoded for transmission; receiving a second codeword of a second message as part of a second transmission, the second message corresponding to the data prior to being encoded for transmission, the second message having a known difference from said first message, where said difference includes a value which changes between the first message and the second message; hypothesizing said difference in the value which changes between said first message and said second message, wherein hypothesizing said difference includes hypothesizing that at least one bit is different between said first message and said second message; determining a hypothesized difference between the first codeword and the second codeword, based upon the hypothesized difference between the first message and the second message; and jointly decoding the first codeword of the first message and the second codeword of the second message utilizing said determined hypothesized difference between the first codeword and the second codeword. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 19)
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11. A wireless receiver comprising:
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a demodulation circuitry configured to demodulate a first codeword of a first message, the first message corresponding to data prior to being encoded for transmission, and a second codeword of a second message, the second message corresponding to the data prior to being encoded for transmission, the second message having a known difference from said first message, where said difference includes a value which changes between the first message and the second message; a decoding circuitry coupled to said demodulation circuitry configured to; hypothesize said difference in the value which changes between said first message and said second message, wherein hypothesizing said difference includes hypothesizing that at least one bit is different between said first message and said second message; determine a hypothesized difference between the first codeword and the second codeword, based upon the hypothesized difference between the first message and the second message; and jointly decode the first codeword of said first message and the second codeword o5 said second message using said determined hypothesized difference between the first codeword and the second codeword. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification