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.
Highlights
The 60 GHz band still being free and unlicensed, a large bandwidth, for example of the order of 1 GHz, and be used
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
The BASK system consists of a high speed shutter of the transmitter and a counter and a repeater of receiver
Summary
The 60 GHz band still being free and unlicensed, a large bandwidth, for example of the order of 1 GHz, and be used. Digital base band signals often are rectangular pulse train. When rectangular pulses are passed through a band limited channel, the pulses will spread in time, and the pulse for each symbol will smear into the time intervals of succeeding symbols. This causes ISI and leads to an increased probability of the receiver making an error in detecting a symbol. The high speed shutter of the transmitter is introduced for pulse shaping, which can minimize ISI. Propose method is that adjust a bandwidth of low pass filter in receiver using the fuzzy logic system. In order to verify the effectiveness of the proposed method, simulations were performed by fixed bandwidth and BER
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