BICM decoding in the presence of co-channel interference
AssigneeMarvell World Trade Ltd.
InventorsJungwon Lee, Rohit U. Nabar, Hui-Ling Lou
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Abstract
Systems and methods are provided for computing soft information for digital information based on a received signal, where the received signal suffers from noise and interference. A receiver that decodes the received signal may estimate channel information, such as the channel gain, associated with the interfering source. The receiver may also obtain modulation information through a backbone network or by decoding control information transmitted by the interfering source. Using the modulation information and the channel information, the receiver may estimate the effect that interference has on the received signal, and may compute soft information (e.g., a log-likelihood ratio) for the digital information.
Claims30
A method of computing soft information for use in estimating digital information from an intended source, the method comprising:
- estimating interference channel information associated with at least one interfering source from one or more transmitted signals;
- determining modulation information for the at least one interfering source;
- receiving a signal corresponding to the digital information, wherein the signal includes an interference signal from the at least one interfering source;
- and
- computing soft information for the digital information from the signal based on an estimate of the interference signal obtained from the interference channel information and using the modulation information.
Apparatus for computing soft information to estimate digital information from an intended source, the apparatus comprising:
- computational logic configured to calculate an estimate of interference channel information associated with at least one interfering source from one or more transmitted signals;
- an input interface to receive a signal corresponding to the digital information, wherein the signal includes an interference signal from the at least one interfering source;
- and
- a soft bit-metric calculator to compute soft information for the digital information from the signal based on an estimate of the interference signal obtained from the interference channel information and using modulation information associated with the at least one interfering source.
Dependencies are inferred from the claim text.