Patent ID: 8369459
Filing Date: 2013-02-05
Classification: H04B

Abstract:
1. A receiver for processing a signal modulated with data symbols and received via a plurality of paths having a relative delay therebetween, the receiver comprising: a sampler configured to sample said signal to obtain at least one sample per data symbol time interval; a channel estimator configured to determine a set of complex channel coefficients that characterize said delayed paths; a metric computer configured to compute an estimate of a current symbol and an associated metric, wherein said current symbol estimate and said associated metric are based on signal samples from said sampler, said channel coefficients from said channel estimator, estimates of previously estimated symbols and associated metrics, and hypotheses of not yet estimated symbols, and wherein the metric computer is further configured to store said current symbol estimates and said associated metrics associated with combinations of said hypothesized symbols in a metric table for said current symbol; and a soft symbol value generator configured to generate a soft symbol value for a symbol based on said signal samples from said sampler, said channel coefficients from said channel estimator and estimates of symbols computed by said metric computer.