DESIGN AND PERFORMANCES OF A 200 MBIT-S 16 QAM DIGITAL RADIO SYSTEM

被引：19

作者：

HORIKAWA, I

MURASE, T

SAITO, Y

机构：

[1] Yokosuka Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation, Yokosuka-shi

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 1979年 / 27卷 / 12期

关键词：

D O I：

10.1109/TCOM.1979.1094362

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel long haul 5 GHz 16 QAM digital radio system, which has 200 Mbit/s transmission capacity within the 40 MHz interleaved channel allocation, is proposed and described. It is designed to be overbuilt on existing FDM-FM routes with an approximately 50 km repeater spacing. To achieve the 5 bit/s/Hz RF spectral efficiency, the 16 QAM modulation and Nyquist cosine roll-off spectral shaping techniques (a = 0.5) are investigated. Then a new signal shaping filter, differential encoding and carrier recovery techniques are presented. Finally, the effects of TWT amplifier nonlinearity on a 16 QAM signal are experimentally investigated. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.

引用

页码：1953 / 1958

页数：6

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