ADAPTIVE RLS DECISION FEEDBACK EQUALIZING SYSTEM AND IMPLEMENTATION METHOD THEREOF

摘要

Disclosed are an adaptive RLS decision feedback equalizing system, characterized by comprising: an error code cross-correlation module, an equalization module, a decision feedback unit, a coefficient updating unit and an autocorrelation estimation module. Also disclosed are an implementation method of the adaptive RLS decision feedback equalizing system, comprising the following steps: 1) setting an initial value of c₀ for a filter coefficient; 2) generating a filtering output signal y_k; 3) computing an error code cross-correlation result I_k; 4) updating the filtering coefficient c_k-1 to c_k; 5) updating an autocorrelation inverse matrix estimation result P_k-1 to P_k according to a forget constant factor w and equalizer input signal sequence r_k; 6) repeating step 2) to step 5), until the equalizer coefficient converges. The present invention can achieve appreciable system performance by requiring only a small number of training signals, as well as reliable transmission adapted for the receiving terminal in a complex hydroacoustic environment, and rapid adaptive equalization.