초록 ▼

A decoder (215) implemented in a receiver of a wireless communication system employs an improved method and apparatus for decoding an encoded signal. The receiver sums the energy values (156A, 156B, . . . 156N) from a plurality of fingers within to produce an aggregate energy value (166). From the a

A decoder (215) implemented in a receiver of a wireless communication system employs an improved method and apparatus for decoding an encoded signal. The receiver sums the energy values (156A, 156B, . . . 156N) from a plurality of fingers within to produce an aggregate energy value (166). From the aggregate energy value (166), a set of log-likelihood values (207) are generated with a non-linear function generator (205) before being deinterleaved by a deinterleaver (210). The deinterleaved values (213) are input to the decoder (215) which estimates the original signal (178) by incorporating path histories of bits in the estimation of subsequent, related bits. Use of the path histories of bits improves the estimates of the original signal (178), which translates into an increase in the sensitivity of the receiver.

대표청구항 ▼

[ What I claim is:] [1.] A method of decoding an encoded signal in a receiver, the encoded signal having been interleaved by a transmitter, the method comprising the steps of:(a) receiving the encoded signal;(b) processing the encoded signal into a set of log-likelihood values by applying a non-line

[ What I claim is:] [1.] A method of decoding an encoded signal in a receiver, the encoded signal having been interleaved by a transmitter, the method comprising the steps of:(a) receiving the encoded signal;(b) processing the encoded signal into a set of log-likelihood values by applying a non-linear function to a group of summed energy values;(c) deinterleaving the set of log-likelihood values;(d) generating a set of conditional soft decision metrics from the set of log-likelihood values;(e) generating bit metrics from the set of conditional soft decision metrics based upon a hard coded symbol value;(f) decoding the bit metrics to produce an estimate of a signal before encoding;(g) generating a plurality of branch metrics from the bit metrics;(h) selecting a surviving branch metric from the plurality of branch metrics;(i) generating path decision history data based on a predetermined number of selections of surviving branch metrics;(j) estimating the signal before encoding from the surviving branch metric and the path decision history data; and(k) generating the hard-coded symbol value from the path decision history data.