Parallel equalizer for DS-CDMA UWB system and method thereof

A method for equalizing a signal in parallel for a DS-CDMA UWB system, comprising:

• filtering a training input signal, by a filtering unit, which is one among a plurality of input signals when the parallel equalizer operates in a ‘training mode’, and filtering the plurality of input signals in parallel when the parallel equalizer operates in a ‘symbol decision mode’;
• obtaining a symbol error, by a symbol decision unit, based on a output from the filtering unit and a training symbol in the ‘training mode’, and estimating a transmission symbol for each of the input signals based on outputs from the filtering unit in the ‘symbol decision mode’, obtaining an error of one among the estimated transmission symbols for a symbol error calculating input signal;
• and
• updating filter tap coefficients of the filtering unit, by a weight updating unit, based on the training input signal or the symbol error calculating input signal and the symbol error obtained in the symbol decision unit and transmitting the updated filter tap coefficients into the filtering unit,
• wherein the filtering unit includes a first filter block and a plurality of filtering blocks to perform parallel filtering of the plurality of input signals in parallel;
• and
• wherein the first filtering block performs filtering of the training input signal in the ‘training mode’ and the first and the plurality of filtering blocks perform filtering of the plurality of input signals in the ‘symbol decision mode’,
• wherein a first updated filter tap coefficients transmitted to the first filtering block for the training input signal operated in the training mode are configured to be generated prior to generating a second updated filter tap coefficients transmitted to the first and the plurality filtering blocks for the plurality of input signals in parallel operated on the symbol decision mode,
• wherein the first updated tap coefficients are configured to be used for determining the second updated filter tap coefficients transmitted to the filtering unit for the plurality of input signals in parallel operated on the symbol decision mode, and
• wherein each of the updated first and second tap coefficients are configured to be generated within transmission of a preamble duration.