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장문기,박문양,박진수 청주대학교 산업과학연구소 1998 産業科學硏究 Vol.16 No.-
In the wireless channel, phase error between transmitter and receiver causes many problems We investigated the bit-error rate performance of a DS/SS signal, operating over a multipath Ravleigh lading channel, when corrupted by phase error as well as additive white Gaussian noise The phase error arises from phase locked loop dynamics and results in imperfect receiver phase estimates whereby the phase errors assume Tikhonov densities The phase estimates are used by a multipath-combining RAKE receiver for demodulation Results indicate that for a PLL with a loop SNR lOdB above the system E_(b)/no, the degradation is less than 3dB, and for a loop SNR of 20dB E_(b)/no, the degradation is 1dB