High performance digital communications in mobile channels

F. Davarian
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引用次数: 13

Abstract

Random amplitude and phase modulations experienced in mobile channels result in a number of system limitations and link impairments. In this paper, a novel approach named "tone calibrated technique" which mitigates multipath fading induced distortions in a digital link is presented. It is shown that a low power pilot tone can be used to continuously calibrate a mobile link against time varying impairments. Coherent demodulation of data is possible by means of the pilot tone without using a conventional tracking loop. Since very little power is consumed by the pilot tone, the performance of the tone calibrated technique is only marginally below BPSK in an unfaded environment.
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移动信道中的高性能数字通信
在移动信道中经历的随机幅度和相位调制导致许多系统限制和链路损伤。本文提出了一种名为“音调校准技术”的新方法,以减轻数字链路中多径衰落引起的失真。结果表明,低功率导频可用于连续校准移动链路以对抗时变损伤。数据的相干解调是可能的手段,通过导频音调,而不使用传统的跟踪回路。由于导频音调消耗的功率很小,因此在未衰减的环境中,音调校准技术的性能仅略低于BPSK。
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