Method for the soft bit metric calculation with linear MIMO detection for LDPC codes
First Claim
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1. A method of soft bit metric calculation for received data signals via a channel in a telecommunications receiver utilizing LDPC decoding, comprising the steps of:
- detecting data symbols in the received signal by applying a linear MIMO detection;
determining the channel noise variance;
calculating the soft bit metrics as a function of the distance and the noise variance.
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Abstract
A MIMO receiver implements a method for the soft bit metric calculation with linear MIMO detection for LDPC codes, after linear matrix inversion MIMO detection. In the receiver, a detector detects the estimated symbol and the noise variance. Further, a soft metric calculation unit computes the distance between the estimated symbol and the constellation point, and then divides the distance by the noise variance to determine the soft bit metrics.
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Citations
26 Claims
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1. A method of soft bit metric calculation for received data signals via a channel in a telecommunications receiver utilizing LDPC decoding, comprising the steps of:
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detecting data symbols in the received signal by applying a linear MIMO detection;
determining the channel noise variance;
calculating the soft bit metrics as a function of the distance and the noise variance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A telecommunications receiver, comprising:
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a detector that detects data symbols in the received signal by determining distances between received signal points and constellation points, and determines the channel noise variance;
a metric calculator that calculates soft bit metrics for received data signals via a channel, as a function of the distance and the noise variance; and
a decoder that performs LDPC decoding of the received signals using the soft bit metrics. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification