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Field test measurement for 128 kbit/s QPSK signal transmission and delay time spread in 1.5 GHz-band land mobile radio

机译:1.5 GHz频段陆地移动无线电中128 kbit / s QPSK信号传输和延迟时间扩展的现场测试测量

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摘要

High-speed digital signal transmission is a promising new field of communication services. In land mobile radio communication, transmission quality severely suffers from frequency selective fading under multipath radiowave transmission environments. Field test measurement results for 128 kbit/s QPSK signal transmission and delay time spread in the Tokyo metropolitan area are presented. The two-branch diversity reception method was adopted to combat fading. Bit error rate (BER) performance is obtained as a function of delay time spread.
机译:高速数字信号传输是通信服务的有希望的新领域。在陆地移动无线电通信中,在多径无线电波传输环境下,频率选择性衰落严重地影响了传输质量。给出了东京都会区内128 kbit / s QPSK信号传输和延迟时间扩展的现场测试测量结果。采用了两分支分集接收方法来对抗衰落。误码率(BER)性能是延迟时间扩展的函数。

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