16 QAM Modulation for High Capacity Digital Radio System

A computational method allowing the calculation of bit error rate in the presence of filtering and some other impairments is described for 16 QAM modulation; a breadboard working at a bit rate of 140 Mbits/s has been implemented and experimental results are compared with calculated values. The possi...

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Bibliographic Details
Published in:I.R.E. transactions on communications systems 1979-12, Vol.27 (12), p.1771-1782
Main Authors: Dupuis, P., Joindot, M., Leclert, A., Soufflet, D.
Format: Article
Language:English
Subjects:
Bit error rate
Bit rate
Digital communication
Digital modulation
Filtering
Frequency
Performance evaluation
Performance gain
Phase shift keying
Quadrature amplitude modulation
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Summary:A computational method allowing the calculation of bit error rate in the presence of filtering and some other impairments is described for 16 QAM modulation; a breadboard working at a bit rate of 140 Mbits/s has been implemented and experimental results are compared with calculated values. The possible use of this modulation type for a high capacity digital radio-relay system is considered. Some parameters are introduced for this purpose, especially the net fade margin parameter. In the case of the 140 Mbit/s system in the 10.7-11.7 GHz frequency band, 4 PSK and 8 PSK modulation types are compared with 16 QAM. System gain, frequency arrangement, nodal capacity and outage performances are evaluated.
ISSN:0090-6778
0096-2244
1558-0857
DOI:10.1109/TCOM.1979.1094363