Reduced complexity soft value generation for MIMO JD-GRAKE receivers
First Claim
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1. A method of processing a received composite communications signal that includes two or more signals of interest, the method comprising the steps of:
- generating combining weights as a function of impairment correlations for despread values of the input signals;
combining the despread values according to the combining weights; and
jointly detecting the signals of interest based on the combined despread values and mixing between symbols in a detection metric.
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Abstract
A receiver includes a receiver circuit that decodes multiple signals of interest contained in a composite receive signal. The receiver comprises at least one Generalized RAKE combining circuit and a joint demodulation circuit and generates a detected signal at an output. The joint demodulation circuit contains a reduced search soft value generator circuit and generates soft bit values that represent coded bits received from the transmitter.
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Citations
36 Claims
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1. A method of processing a received composite communications signal that includes two or more signals of interest, the method comprising the steps of:
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generating combining weights as a function of impairment correlations for despread values of the input signals;
combining the despread values according to the combining weights; and
jointly detecting the signals of interest based on the combined despread values and mixing between symbols in a detection metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A receiver for processing a received composite communications signal that includes two or more signals of interest, said receiver comprising:
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a plurality of correlator banks and a combiner for a generating combining weights as a function of impairment correlations for despread values of the input signals and for combining the despread values according to the combining weights; and
a reduced search soft value generator for jointly detecting the signals of interest based on the combined despread values and mixing between symbols in a detection metric. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A wireless communication system, comprising:
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a base station for transmitting a composite communications signal;
a mobile terminal for receiving and processing the composite communications signal that includes two or more signals of interest by performing the following steps;
generating combining weights as a function of impairment correlations for despread values of the input signals;
combining the despread values according to the combining weights; and
jointly detecting the signals of interest based on the combined despread values and mixing between symbols in a detection metric. - View Dependent Claims (26, 27, 28)
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29. A mobile terminal comprising:
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a plurality of receive antennas for receiving a composite communications signal; and
a receiver including;
a plurality of correlator banks and a combiner for a generating combining weights as a function of impairment correlations for despread values of the input signals and for combining the despread values according to the combining weights; and
a reduced search soft value generator for jointly detecting the signals of interest based on the combined despread values and mixing between symbols in a detection metric. - View Dependent Claims (30, 31, 32)
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33. A base station comprising:
a plurality of transmit antennas for transmitting a composite communications signal to a mobile terminal that includes;
a plurality of receive antennas for receiving a composite communications signal; and
a receiver including;
a plurality of correlator banks and a combiner for a generating combining weights as a function of impairment correlations for despread values of the input signals and for combining the despread values according to the combining weights; and
a reduced search soft value generator for jointly detecting the signals of interest based on the combined despread values and mixing between symbols in a detection metric. - View Dependent Claims (34, 35, 36)
Specification