Paper Info
Title
A modified design of trellis-coded MPSK for the fading channel
Abstract
Abstruct-Multiple trellis-coded modulation (MTCM) of MPSK employs separate designs, which are optimum at high SNR, for the Rayleigh fading channel and the AWGN channel, in order to meet the different design criteria for the two channels. The separate designs are no longer optimum if the channel conditions are interchanged, if the channel is Rician, or if the SNR's are moderate. In this paper, a modified design MTCM (MD) is considered, wherein it is shown that the classical AWGN channel design can be retained for the Rician fading channel (which is Rayleigh and AWGN at the extremes) with any degree of fading, by choosing an appropriate signal set of size Mmin. The signal set size Mmin depends on the throughput rate and the number of parallel transitions between a given pair of states. For a given throughput rate and signal diversity, the proposed MTCM (MD) schemes achieve a higher value of &(free) and the same or higher value of branch distance product when compared to existing MTCM schemes designed for the Rayleigh fading channel. The improved performance ensuing on the Rician fading channel is demonstrated by asymptotic coding gains with respect to existing MTCM schemes and simulation results for some of the codes. The effect of phase errors due to fading on the MTCM (MD) schemes which have increased signal set size in some cases is also studied by simulation.
Year
DOI
Venue
1993
10.1109/26.231910
Communications, IEEE Transactions  
Keywords
Field
DocType
fading,phase shift keying,telecommunication channels,trellis codes,AWGN channel design,MTCM,Rician fading channel,additive white Gaussian noise,branch distance product,multiple trellis-coded modulation,set partitioning,signal diversity,signal set,throughput rate,trellis encoder,trellis-coded MPSK
Rayleigh fading,Fading,Communication channel,Electronic engineering,Modulation,Encoder,Additive white Gaussian noise,Mathematics,Phase-shift keying,Rician fading
Journal
Volume
Issue
ISSN
41
6
0090-6778
Citations 
PageRank 
References 
3
0.49
7
Authors
2
Name
Order
Citations
PageRank
S. S. Periyalwar181.04
Fleisher, Solomon M.2111.67