Title :
Trellis coding of quadrature frequency/phase modulated signals
Author :
Periyalwar, Shalini S. ; Fleisher, Solomon
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. of Nova Scotia, Halifax, NS, Canada
fDate :
10/1/1992 12:00:00 AM
Abstract :
The authors explore the trellis coding of continuous-phase quadrature frequency/phase modulated (CPQFPM) signal sets and continuous-phase FPM (CPFPM) signal sets, which are embodiments of the quadrature biorthogonal modulation (QBOM) technique. Conventional TCM and multiple TCM schemes with these modulation formats are examined using both the AWGN channel and the Rician fading channel design. Asymptotic coding gains in d2(free) are tabulated for trellis-coded rate 3/4, 5/6, and 6/7 QFPM schemes, in comparison with uncoded modulations (8AMPM, 32AMPM) and other trellis-coded modulations [TCM (2FSK/4PSK 16QAM, 64QAM), MTCM (2FSK/8PSK)] of equivalent throughput rate. Performance gains on the Rician fading channel are demonstrated by increased values of the design parameters for this channel, namely symbol diversity Lmin and branch distance product P
Keywords :
fading; frequency modulation; phase modulation; telecommunication channels; trellis codes; white noise; AWGN channel; CPFPM; CPQFPM; Rician fading channel; asymptotic coding gains; continuous-phase FPM; multiple TCM schemes; quadrature biorthogonal modulation; quadrature frequency/phase modulated signals; trellis coding; AWGN channels; Convolution; Convolutional codes; Frequency; Modulation coding; Multidimensional systems; Performance gain; Phase modulation; Quadrature amplitude modulation; Rician channels;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
