Title :
The effects of time delay spread on turbo-TCM in a wireless communication channel
Author :
Fei, Xiaofan ; Ko, Tszmei
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Clear Water Bay, Hong Kong
Abstract :
This paper presents some simulation results on the performances of turbo-codes with multilevel modulation (turbo-TCM) in a wireless environment. The wireless channel is modeled as a frequency selective fading channel with two time delay spread profiles, namely, a two-ray profile and a one-sided exponential profile. Turbo-TCM codes constructed from punctured turbo-codes combined with different modulation schemes are studied. It is found that turbo-TCM achieves unmatched performance of average irreducible BER. Turbo-TCM has much lower error probability than conventional TCM, especially in channels with high delay spread
Keywords :
concatenated codes; convolutional codes; error statistics; fading; multipath channels; trellis coded modulation; BER; error probability; frequency selective fading channel; multilevel modulation; one-sided exponential profile; parallel convolutional concatenated codes; punctured turbo-codes; time delay spread effects; turbo-TCM; turbo-codes; two-ray profile; wireless communication channel; Bit error rate; Delay effects; Error probability; Fading; Frequency; Intersymbol interference; Modulation coding; Multipath channels; Turbo codes; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.596375
