Optimal feedback weighting for soft-decision cancellers
First Claim
1. A receiver, comprising:
- an SINR measurement module configured for producing a plurality of SINR measurements corresponding to a plurality of soft symbol estimates from a received multipath signal,a weight and threshold module configured for producing a plurality of processed symbol estimates corresponding to pluralities of multipaths and subchannels, each processed symbol estimate comprising a hard estimate or a weighted soft estimate based on a predetermined SINR threshold,an interference-cancellation module configured for producing a plurality of interference cancelled signals, each corresponding to a different multipath,a combining module configured for combining the plurality of interference-cancelled signals; and
a threshold calculation module for determining the predetermined SINR threshold.
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Abstract
A receiver produces optimal weights for cancelling multipath interference. An SINR measurement module generates SINR measurements corresponding to soft symbol estimates produced by a baseband receiver from a received multipath signal. Each soft symbol estimate is replaced with either a hard estimate or a weighted soft estimate based on how each corresponding SINR measurement compares to a predetermined threshold. The received multipath signal and estimated interference signals generated from the hard symbol estimates and/or the weighted soft symbol estimates are combined to produce interference cancelled signals that may be combined via maximum ratio combining to produce an interference-cancelled MRC signal.
220 Citations
85 Claims
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1. A receiver, comprising:
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an SINR measurement module configured for producing a plurality of SINR measurements corresponding to a plurality of soft symbol estimates from a received multipath signal, a weight and threshold module configured for producing a plurality of processed symbol estimates corresponding to pluralities of multipaths and subchannels, each processed symbol estimate comprising a hard estimate or a weighted soft estimate based on a predetermined SINR threshold, an interference-cancellation module configured for producing a plurality of interference cancelled signals, each corresponding to a different multipath, a combining module configured for combining the plurality of interference-cancelled signals; and a threshold calculation module for determining the predetermined SINR threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A receiving method, comprising:
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providing for producing a plurality of SINR measurements corresponding to a plurality of soft symbol estimates from a received multipath signal, providing for producing a plurality of processed symbol estimates, each processed symbol estimate comprising a hard estimate or a weighted soft estimate based on a comparison to a predetermined SINR threshold, providing for producing a plurality of interference-cancelled signals, each corresponding to a different multipath, providing for combining the plurality of interference-cancelled signals, and, providing for determining the predetermined SINR threshold. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A receiver, comprising:
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a means for producing a plurality of SINR measurements corresponding to a plurality of soft symbol estimates for a received multipath signal, a means for producing a plurality of processed symbol estimates, each processed symbol estimate comprising a hard estimate or a weighted soft estimate based on a predetermined SINR threshold, a means for producing a plurality of interference-cancelled signals, each corresponding to a different multipath, a means for combining the plurality of interference-cancelled signals, and a means for determining the predetermined SINR threshold. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A chipset, comprising:
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an SINR measurement module configured for producing a plurality of SINR measurements corresponding to a plurality of soft symbol estimates from a received multipath signal, a weight and threshold module configured for producing a plurality of processed symbol estimates corresponding to pluralities of multipaths and subchannels, each processed symbol estimate comprising a hard estimate or a weighted soft estimate based on a predetermined SINR threshold, an interference-cancellation module configured for producing a plurality of interference-cancelled signals, each corresponding to a different multipath, a combining module configured for combining the plurality of interference-cancelled signals, and a threshold calculation module for determining the predetermined SINR threshold. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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70. A handset, comprising:
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an SINR measurement module configured for producing a plurality of SINR measurements corresponding to a plurality of soft symbol estimates from a received multipath signal, a weight and threshold module configured for producing a plurality of processed symbol estimates corresponding to pluralities of multipaths and subchannels, each processed symbol estimate comprising a hard estimate or a weighted soft estimate based on a predetermined SINR threshold, an interference-cancellation module configured for producing a plurality of interference-cancelled signals, each corresponding to a different multipath, a combining module configured for combining the plurality of interference-cancelled signals, and a threshold calculation module for determining the predetermined SINR threshold. - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85)
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Specification