Patent ID: 7643579
Filing Date: 2010-01-05
Classification: H04B,H04W

Abstract:
1. A multiple differential demodulator using a weighting value to detect a symbol of a reception signal, comprising: a multiple differentiator configured for multi-delaying the reception signal by a plurality of predetermined delay times, conjugating and then multiplying the delayed reception signals by a current reception signal to output a plurality of differentiated reception signals; a weighting value generator configured to: integrate a real part and an imaginary part of a value acquired by multiplying one of the plurality of differentiated reception signals by a conjugated value of a differentiated PN code signal corresponding to a preset symbol; determine the greater of the integrated real and integrated imaginary parts; and apply a predetermined weighting value to the greater of the integrated real and integrated imaginary parts to generate a weighting value output, where the PN code signal is differentiated in the same fashion as the differentiated reception signals; a plurality of coherent detectors configured to: generate an integration value by integrating the real part and the imaginary part of the value acquired by multiplying the plurality of differentiated reception signals by the conjugated value of the differentiated PN code signal corresponding to the preset symbol; multiply the integration value by the weighting value output; and add the multiplied integration value to the rest of the integration values in order to generate a resultant value used to compute a correlation value between the reception signal and a symbol corresponding to the reception signal; and a maximum value selector configured to compare output results of the plurality of coherent detectors and determine the preset symbol of a coherent detector having a maximum correlation value as a symbol for the reception signal.