주파수 선택적 레일리 페이딩 채널에서의 DMF 초기동기 장치의 성능분석 = Performance Analysis of DMF Acquisition System in Frequency - Selective Rayleigh Fading Channel

다국어 초록 (Multilingual Abstract)

In frequency selective channels, conventional PN code acquisition schemes are not ideal candidates. This is because they are primarily designed for the AWGN channel. In this paper, a direct-sequence spread-spectrum (DSSS) PN code acquisition system based on digital matched filtering (DMF) with automatic threshold control (ATC) algorithm is presented and analyzed with regards to probability of detection and probability of false alarm. These two important probabilities, the probability of detection (P_D) and the probability of false alarm (P_FA) are derived and analyzed in considering Doppler shift, sampling rate, mean acquisition time, and PN chip rate in frequency selective Rayleigh fading channel when using serial-search method as detection technique. From computer simulation results of a DMF acquisition system model, it is shown that the performance of the acquisition system using ATC algorithm is better than that of constant threshold system.