Detector for single-user coded signals in the presence of interference
AssigneeMarvell International Ltd.
InventorsJungwon Lee, Hui-Ling Lou
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Abstract
Techniques are provided for detecting a coded signal in the presence of interference. In an embodiment, a primary transmitter corresponds to a desired transmitter, and one or more secondary transmitters correspond to interfering transmitters. Received symbols, which include interference and additive noise, are filtered to recover a set of original message bits. An estimate of the set of original message bits may be determined using an ordered successive interference cancellation (SIC) decoder that uses either a SIC detector or an AWGN-based detector, depending on the signal-to-interference ratio at a primary receiver.
Claims20
A method of decoding symbols, the method comprising:
- receiving a symbol comprising a data portion, an interference portion, and a noise portion;
- determining a signal constellation for the symbol based on a first signal constellation associated with the data portion and a second signal constellation associated with the interference portion;
- decoding the interference portion based on a distance metric between the symbol and the data portion;
- removing the decoded interference portion from the symbol to produce a modified symbol;
- and
- decoding the data portion based on the modified symbol.
A system comprising:
- receiver circuitry configured to receive a symbol comprising a data portion, an interference portion, and a noise portion;
- and
- decoding circuitry configured to:
- determine a signal constellation for the symbol based on a first signal constellation associated with the data portion and a second signal constellation associated with the interference portion;
- decode the interference portion based on a distance metric between the symbol and the data portion;
- remove the decoded interference portion from the symbol to produce a modified symbol;
- and
- decode the data portion based on the modified symbol.
Dependencies are inferred from the claim text.