
{"publication_number": "US-7564913-B1", "abstract": "a receiver baseband processor comprises a channel estimator that generates a channel estimate from the received symbol . a phase demodulator selectively rotates the phase of the received symbol based on the channel estimate . a viterbi decoder generates a plurality of branch metrics based on the channel estimate and selectively phase rotated received symbol and estimates a clean symbol based on the plurality of branch metrics .", "application_number": "US-59070806-A", "description": "the first section below describes joint equalization and viterbi decoding consistent with several disclosed embodiments of the invention , including those incorporating csi and hard - decision decoding features . section 2 describes complexity reduction techniques for computing the branch metrics in a viterbi decoder with csi . finally , section 3 describes viterbi decoder complexity reduction in an mrc plural receive antennae environment . we propose eliminating the division operations in equation ( 1 ) discussed above and demodulate the received symbols using method i , in rectangular form : the in - phase and quadrature demodulated symbols are the real and imaginary parts of x k , n ( i . e . re { x k , n 