Title :
Implementation of a 16-ary QAM demodulator for medium data rates
Author :
Fines, P. ; Aghvami, A.H.
Author_Institution :
King´´s Coll. London, UK
Abstract :
A new structure for a medium bit rate (2 Mb/s) differentially encoded quadrature amplitude modulation (16-DEQAM) demodulator operating over a land mobile satellite channel, is proposed and its performance is evaluated. The synchronization and detection digital techniques employed in this system are described. The hardware speed limitations have been overcome effectively with extensive use of look-up tables and concurrent digital signal processing on polar signal representation. The acquisition and bit error rate (BER) performances are evaluated by computer simulation over additive white gaussian noise (AWGN) and Rician fading channel
Keywords :
amplitude modulation; demodulators; digital radio systems; mobile radio systems; satellite relay systems; 16-DEQAM; 16-ary QAM demodulator; 2 Mbit/s; BER; Rician fading channel; acquisition; additive white gaussian noise; bit error rate; computer simulation; differentially encoded quadrature amplitude modulation; digital signal processing; land mobile satellite channel; look-up tables; polar signal representation;
Conference_Titel :
Radio Receivers and Associated Systems, 1989., Fifth International Conference on
Conference_Location :
Cambridge
Print_ISBN :
0-86341-705-1
