The Performance Improvement of BASK System for Giga-Bit MODEM Using the Fuzzy System
- 1
- 2
- 3
Abstract
In this paper we propose an automatic bandwidth control method for the performance improvement of Binary Amplitude Shift Keying (BASK) system for Giga-bit Modem in millimeter band. To improve the performance of the BASK system with a fixed bandwidth, the proposed method is to adjust a bandwidth of low pass filter in receiver using the fuzzy system. The BASK system consists of a high speed shutter of the transmitter and a counter and a repeater of receiver. The repeater consists of four stage converters, and a converter is constructed with a low pass filter and a limiter. The inputs to the fuzzy system are the reminder and integral of remainder of counter, and output is a bandwidth. We used a Viterbi algorithm to find the optimum detection from output of the counter. Simulation results show that the proposed system improves the performance compared to the fixed bandwidth.
- V. R. M. Thyagarajan, R. H. M. Hafez and D. D. Falconer, “Broadband Indoor Wireless Communication in (20 ~ 60) GHz Band: Signal Strength Considerations,” Universal Personal Communication, Vol. 2, October 1993, pp. 894-899.
- T. S. Rappaport, “Wireless Communications,” 2nd Edition, Prentice Hall, New Jersey, 2002.
- E. Lindskog and A. Paulraj, “A Transmit Diversity Scheme for Channels with Intersymbol Inference,” Proceedings of IEEE International Conference on Communications, New Orleans, Vol. 1, June 2000, pp. 307-311.
- S. Haykin, “Communication Systems,” 4th Edition, John Wiley Inc., Canada, 2000.
- R. Johnston, “Fuzzy Logic Control,” GEC Journal of Research, Vol. 11, No. 2, 1994, pp. 99-109.
- M. Hosemann, R. Habendorf and G. P. Fettweis, “Hardware-Software Codesign of A 14.4 Mbit - 64 State - Viterbi Decoder for An Application-Specific Digital Signal Processor,” Proceedings of IEEE Workshop on Signal Processing Systems 2003, Seoul, 27-29 August 2003, pp. 45-50.