Patent ID: 7949079
Filing Date: 2011-05-24
Classification: H03M,H04B,H04L

Abstract:
1. A transceiver comprising: an antenna configured to receive an analog radio frequency signal having been transmitted over a channel, the analog radio frequency signal comprising a time-domain analog Orthogonal Frequency Division Multiplexing (OFDM) symbol; an analog-to-digital converter configured to convert the time-domain analog Orthogonal Frequency Division Multiplexing (OFDM) symbol into a corresponding time domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol; a fast Fourier transform module to convert the time domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol into a frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol; a channel estimator configured to generate an estimate of the channel for each sub-carrier of the frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol; a demodulator configured to i) receive the estimate from the channel estimator and ii) generate a plurality of demodulated symbols based, at least in part on, the estimate of the channel for each sub-carrier of the frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol, each demodulated symbol corresponding to a given sub-carrier of the frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol; and a Viterbi detector configured to i) receive the OFDM symbol directly from the fast Fourier transform module, ii) receive the estimate from the channel estimator, and iii) perform, using the OFDM symbol and the estimate, a soft-decision decoding on each demodulated symbol and generate a corresponding soft-decision decoded symbol, wherein the soft-decision decoding of each demodulated symbol is based, at least in part, on the estimate of the channel corresponding to the given sub-carrier associated with the demodulated symbol.