Title :
The WESt combiner: benefits in digital radio systems for space diversity receivers
Author :
Bemasconi, A. ; Lago, A.Dal
Author_Institution :
Siemens Telecomunicazioni S.p.A., 20060 Cassino de´´ Pecchi (MI) - Italy
Abstract :
The paper presents an efficient combination strategy for Space Diversity Receivers. The improved system performance obtained in High Capacity SDH Digital Radio with QAM modulation formats are shown. The combination control algorithm optimises the system performance using a strategy that properly weights power level and spectrum distortion to evaluate their impact on BER, and consequently acts on a RF endless phase shifter and two paths IF relative amplitude to optimise BER itself. First application of WESt (Weighted Evaluation Strategy) combiner was for a 6L band, 128 TCM (Trellis Coded Modulation) lxSTM-1 signal: laboratory test set and measurements are presented.
Keywords :
Bit error rate; Control systems; Digital communication; Phase distortion; Phase shifters; Quadrature amplitude modulation; Radio frequency; Receivers; Synchronous digital hierarchy; System performance;
Conference_Titel :
Microwave Conference, 1993. 23rd European
Conference_Location :
Madrid, Spain
DOI :
10.1109/EUMA.1993.336807
