Title :
A new 16-ary QAM demodulator for medium and high data rate services
Author :
Fines, P. ; Aghvami, A.H.
Author_Institution :
King´´s Coll., London Univ., UK
Abstract :
A 16-ary differentially encoded quadrature amplitude modulation (16-DEQAM) demodulator for medium- and high-bit-rate (from 2 Mb/s to 100 Mb/s) land mobile satellite communication is proposed, and its performance is evaluated. The digital synchronization and digital detection techniques used in this system are described. The hardware speed limitations have been overcome effectively with extensive use of lookup tables and concurrent digital signal processing on a polar signal representation. The bit error rate (BER) performance was evaluated by computer simulation over additive white Gaussian noise (AWGN) and Rician fading channels
Keywords :
amplitude modulation; digital radio systems; mobile radio systems; modems; satellite relay systems; signal processing; 16-DEQAM; 16-QAM modem; 16-ary QAM demodulator; AWGN; BER; Rician fading channels; additive white Gaussian noise; bit error rate; concurrent digital signal processing; differentially encoded quadrature amplitude modulation; digital detection; digital synchronization; high data rate services; land mobile satellite communication; lookup tables; polar signal representation; AWGN; Bit error rate; Computer simulation; Demodulation; Digital signal processing; Hardware; Quadrature amplitude modulation; Satellite communication; Signal representations; Table lookup;
Conference_Titel :
Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-87942-697-7
DOI :
10.1109/GLOCOM.1991.188626
