DocumentCode :
2982560
Title :
Signal processing for a spectrum efficient single channel digital radio system
Author :
Curto, M. Lo ; Salern, M.
Author_Institution :
Siemens Telecommun. SpA, Milan, Italy
fYear :
1990
fDate :
2-5 Dec 1990
Firstpage :
1696
Abstract :
A modem design for single-channel (64-kb/s) point-to-point digital radio applications is presented and discussed. Emphasis is placed on a number of dedicated techniques and algorithms adopted to treat all the problems peculiar to single-channel spectrum-efficient transmission. A number of problems concerning Gaussian and impulse noise, both influencing a very-low-capacity radio system which adopts multilevel quadrature amplitude modulation (QAM) and coherent demodulation, are investigated. Viable solutions are found using complex baseband signal processing for modulation and demodulation. The extensive use of software-programmable digital signal processors (DSPs), already adopted on telephone channel modems, is demonstrated to be an optimum solution for radio applications also. Advantages in terms of design flexibility, compactness, and performance are obtained mainly when a very high bandwidth efficiency is required. Some preliminary experimental results are presented
Keywords :
amplitude modulation; digital radio systems; digital signal processing chips; modems; radio links; 64 kbit/s; DSP chips; Gaussian noise; compactness; design flexibility; high bandwidth efficiency; impulse noise; modem design; multilevel QAM; performance; point-to-point digital radio; quadrature amplitude modulation; software-programmable digital signal processors; spectrum efficient single channel digital radio system; Baseband; Demodulation; Digital communication; Digital signal processing; Digital signal processors; Gaussian noise; Modems; Noise level; Quadrature amplitude modulation; Signal processing algorithms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-87942-632-2
Type :
conf
DOI :
10.1109/GLOCOM.1990.116775
Filename :
116775
Link To Document :
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