Weitere Artikel dieser Ausgabe durch Wischen aufrufen
A novel type of turbo coded modulation scheme, called multilevel turbo coded-continuous phase frequency shift keying (MLTC-CPFSK), is designed to improve the overall bit error rate (BER) and bandwidth efficiency. Then, this scheme is combined with a new double decision feedback equalizer (DDFE) to remove the interference and to enhance BER performance for the intersymbol interference (ISI) channels. The entire communication scheme is called multilevel turbo equalization-continuous phase frequency shift keying (MLTEQ-CPFSK). In these schemes, parallel input data sequences are encoded using the multilevel scheme and mapped to CPFSK signals to obtain a powerful code with phase continuity over the air. The performances of both MLTC-CPFSK and MLTEQ-CPFSK systems were simulated over nonfrequency and frequency-selective channels, respectively. The superiority of the two level turbo codes with 4CPFSK modulation is shown against the trellis-coded 4CPFSK, multilevel convolutional coded 4CPFSK, and TTCM schemes. Finally, the bit error rate curve of MLTEQ-CPFSK system over Proakis B channel is depicted and ISI cancellation performance of DDFE equalizer is shown against linear and decision feedback equalizers
Berrou C, Glavieux A, Thitimajshima P: Near Shannon limit error-correcting coding and decoding: turbo-codes (1). Proceedings of IEEE International Conference on Communications (ICC '93), May 1993, Geneva, Switzerland 1064-1070. CrossRef
Papke L, Fazel K: Combined multilevel turbo-code with MR-modulation. Proceedings of IEEE International Conference on Communication (ICC '95), June 1995, Seattle, Wash, USA 2: 668-672. CrossRef
Divsalar D, Pollara F: Multiple turbo codes. Proceedings of IEEE Military Communications Conference (MILCOM '95), November 1995, San Diego, Calif, USA 1: 279-285.
Robertson P, Wörz T: Bandwidth-efficient turbo trellis-coded modulation using punctured component codes. IEEE Journal on Selected Areas in Communications 1998, 16(2):206-218. 10.1109/49.661109 CrossRef
Blackert WJ, Wilson SG: Turbo trellis coded modulation. Proceedings of the Conference on Information Signals and System (CISS '96), March 1996, Princeton, NJ, USA
Bayat O, Shafai B, Ucan ON: Iterative equalization of frequency selective channels. Proceedings of IEEE/Sarnoff Symposium on Advances in Wired and Wireless Communication, April 2005, Princeton, NJ, USA 33-36. CrossRef
Bayat O, Shafai B, Ucan ON: Reduced state equalization of multilevel turbo coded signals. Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP '05), March 2005, Philadelphia, Pa, USA 3: 705-708.
Osman O, Ucan ON, Odabasioglu N: Performance of multilevel turbo codes with group partitioning over satellite channels. IEE Proceedings: Communications 2005, 152(6):1055-1059. 10.1049/ip-com:20059063 CrossRef
Odabasioglu N, Ucan ON: Multilevel turbo coded-continuous phase frequency shift keying (MLTC–CPFSK). Computers & Electrical Engineering. In press
Proakis JG: Digital Communications. 4th edition. McGraw-Hill, New York, NY, USA; 2000.
Bayat O, Hisham A, Ucan ON, Osman O: Performance of turbo coded signals over fading channels. Journal of Electrical & Electronics Engineering 2002, 2(1):417-422.
- Joint Multilevel Turbo Equalization and Continuous Phase Frequency Shift Keying
Osman N. Ucan
- Springer International Publishing
- EURASIP Journal on Wireless Communications and Networking
Elektronische ISSN: 1687-1499
Neuer Inhalt/© ITandMEDIA, Product Lifecycle Management/© Eisenhans | vege | Fotolia