Title :
New TCM codes for AWGN and ISI channel by matched symbol-mapping method
Author :
Sripimanwat, Keattisak ; Rajatheva, R.M.A.P. ; Ahmed, Kazi
Author_Institution :
SAT, Asian Inst. of Technol., Bangkok, Thailand
Abstract :
A new trellis coded modulation (TCM) design method is presented in this paper in order to improve the coding gain for wireless communications through AWGN and intersymbol interference (ISI) channel. In this work, a definition for matching the distribution of received symbol probability to the signal subset construction, called “matched symbol-mapping”, is proposed. Several new codes have been constructed at throughput (Rb) of 1, 1.5, 2.5 and 3 bits/sec/Hz. They have been simulated in AWGN, and in multipath Rayleigh fading (ISI) channel with signal equalization by sub-optimum soft output equalizer (SSE), and with pre-equalization by phase precoding. Results show that the proposed method can be used successfully to construct new TCM codes achieving a better performance
Keywords :
AWGN channels; Rayleigh channels; channel coding; equalisers; intersymbol interference; multipath channels; phase coding; trellis coded modulation; AWGN channel; ISI channel; TCM codes; coding gain; intersymbol interference; matched symbol-mapping method; multipath Rayleigh fading channel; phase precoding; pre-equalization; received symbol probability; signal equalization; signal subset construction; sub-optimum soft output equalizer; trellis coded modulation; wireless communications; AWGN; Bit error rate; Decoding; Design methodology; Equalizers; Fading; Intersymbol interference; Modulation coding; Throughput; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886299
