Trellis Coded Modulation over Land Mobile Satellite Channel
نویسنده
چکیده
In order to start designing any communication system, simulation is needed and especially when the system design cost is very expensive like satellite link. The simulation make us take the right decision about the system and its component and parameters. One of to the trends enhance the transmission is the use of coding. In this paper the performance of trellis coding modulation (TCM) over land mobile satellite (LMS) channel is presented and compared with other coding method and the absent of coding. It was found that the supplement of coding will not enhance the system always and the TCM is not always give better performance over normal coding in all cases.
منابع مشابه
Reference-based Trellis Coded Modulation Schemes for Shadowed Rician Fading Channels
Abst rac t -The Canadian mobile satellite (MSAT) channel has been modelled as the sum of lognormal and Rayleigh components to represent foliage attenuation and multipath fading, respectively. Several authors have applied trellis coded modulation (TCM) schemes to this channel, estimating the bit error performance via computer simulation. In this paper, a general expression is presented for the p...
متن کاملChernoff bound of trellis-coded modulation over correlated fading channels
N radio and satellite channels, system performance is 0 degraded by Rician or Rayleigh fading resulting from multipath propagation. Performance can be improved by channel coding combined with interleaving; the deinterleaver at the receiver allows decorrelation of the fading. A criterion, deduced from a Chemoff error probability bound, for the design of trellis-coded modulation for uncorrelated ...
متن کاملTrellis-Coded Quadrature Amplitude Modulation with 2N-Dimensional Constellations for Mobile Radio Channels
– Using a modified Wei method, originally designed for AWGN channels, we have constructed fourand six-dimensional trellis codes with rectangular signal constellations for frequency-nonselective mobile radio channels. Applying a novel way of partitioning the 2-D constituent constellations, both into subsets with enlarged minimum Euclidean distance and subrings including equal energy signal point...
متن کاملTurbo Trellis Coded Modulation with Iterative Decoding for Mobile Satellite Communications
In this paper, analytical bounds on the performance of parallel concatenation of two codes, known as turbo codes, and serial concatenation of two codes over fading channels are obtained. Based on this analysis, design criteria for the selection of component trellis codes for MPSK modulation, and a suitable bit-by-bit iterative decoding structure are proposed. Examples are given for throughput o...
متن کاملVideo image transmission over mobile satellite channels
This paper addresses the transmission of low bit-rate video image sequences through mobile satellite channels to provide portable communications services to remote areas. The particularly challenging aspects of this transmission channel include (1) rapid fading and log-normal shadowing, (2) low signal-to-noise ratio (SNR) due to the noise-limited channel, (3) the satellite's geostationary orbit...
متن کامل