Journal of the Korean Institute of Telematics and Electronics A (전자공학회논문지A)
- Volume 33A Issue 3
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- Pages.10-17
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- 1996
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- 1016-135X(pISSN)
Performance analysis of TDL for tracking of a direct-sequence spread-spectrum system in a multipath fading channel
다중경로 페이딩 전송로에서 직접시퀀스 확산대역 시스템이 추적을 위한 TDL의 성능분석
Abstract
The performance of tau-dither loop (TDL) is evaluated for a direct-sequence spread-spectrum system in a multipath fading channel. The multipath fading channel is modeled as a two-ray rayleight fading channel. The code tracking perfomrance of TDL is analyzed in terms of tracking jitter and mean-tiem-to-lose-lick (MTLL). The tracking jitter performance is degraded while MTLL perfomrance is improved with increasing discriminator offset and decreasing power ratio of main to second paths. It is shown that for a large bit SNR, the effect of multipath fading becomes more significant. And it is also shown that tracking jitter and MTLL performance is less sensitive to delay spacing and discriminator offset for a small bit SNR than for a large bit SNR.
Keywords