一种新的陆地移动卫星通信载波恢复电路

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Pub Date : 1991-09-23 DOI:10.1109/PIMRC.1991.571507

K. Kobayashi, T. Sakai, S. Kubota, M. Morikura, S. Kato

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引用次数: 5

摘要

针对快速衰落信道中相移键控(PSK)信号的相干检测，提出了一种DCF(双载波滤波器)反调制型载波恢复电路，实现了较低的载波跳变率和满意的相位跟踪性能。该方案在反向调制型载波恢复电路中同时采用窄带和宽带载波滤波器。计算机仿真表明，采用该方案的QPSK(四相移键控)调制解调器在Pe=10/sup 4/(经过Viterbi解码(R=7/8, K=7)， C/M(直接与多径信号功率比)=10 dB，交错大小=64*64)下的Pe性能比采用反向调制罐限幅器方案或Costas环路方案的传统相干检测提高1.5 dB。>

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A New Carrier Recovery Circuit For Land Mobile Satellite Communication

A DCF (dual carrier filter) reverse-modulation-type carrier recovery circuit is proposed to achieve a low carrier skipping rate and satisfactory phase tracking performance for coherent detection of PSK (phase shift keying) signals in fast Rician fading channels. The proposed scheme employs both narrow and wide bandwidth carrier filters simultaneously for the reverse-modulation-type carrier recovery circuit. It is clarified by computer simulation that the Pe performance of a QPSK (quadriphase shift keying) modem employing the proposed scheme shows an improvement of 1.5 dB in required E/sub s//N/sub O/ at Pe=10/sup 4/ (after Viterbi decoding (R=7/8, K=7), C/M (direct-to-multipath signal power ratio)=10 dB, interleaving size=64*64), compared with conventional coherent detection employing the reverse modulation tank-limiter scheme or the Costas loop scheme. >

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来源期刊

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

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