发明名称
摘要 PURPOSE:To reduce the amount of interference to a nearby system and a burst, by inverting the sign of a base-band data signal before band limitation in accordance with a time slot. CONSTITUTION:A carrier wave 1 is processed by orthogonal amplitude modulation 3 wtth a base-band data signal which contains burst-like information processed by band limintation 4, and the modulated wave is turned on and off under control 2 in response to a control signal which synchronizes with the burst-like information. Then, the base-band data signal before the band limitation 4 is supplied to a sign infverting circuit 5 to make the sign of data of a time slot right before or after the burst-like information different from the code of data of the starting or ending time slot of the burst-like information. Thus, the amount of interference to a nearby system is reduced without providing a band-pass filter for an RF band.
申请公布号 JPS637693(B2) 申请公布日期 1988.02.18
申请号 JP19810003672 申请日期 1981.01.12
申请人 NIPPON ELECTRIC CO 发明人 YAMAMOTO KAZUHIRO;ATOBE MASAAKI
分类号 H04B7/15;H04B7/212;H04J3/00;H04J3/06;H04L27/34 主分类号 H04B7/15
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