Performance Analysis Of Wide Interval MB-MFSK System

Development Trend of wireless communication is to take a more complexalgorithm to deal with more complex channel. However, the structures and algorithmsof communications can’t adapt to all channels no matter how complex they are. The HFand underwater acoustic channel are the typical time-varying channel, whoseparameters change over time. Although, coherent communication has high spectrumutilization, there is always a channel matching problem. While MultiBand M-aryFrequency Shift Keying (MB-MFSK) technology combines the MFSK communicationsystem and Orthogonal Frequency Division Multiplexing (OFDM). It inherits both thestable and reliable performance of traditional MFSK communication system, and theadvantage of high spectrum utilization of OFDM.Since Partial Band Noise Jamming (PBNJ) widely exists in both HF channel andunderwater acoustic channel. In order to against PBNJ, improve the performance of thesystem, this article proposes the wide interval mapping MB-MFSK communicationsystem, which disperses the PBNJ to each sub-band and reduces the probability of beinginterfered of each sub-band. Through the theoretical analysis and simulation, the newsystem has a better performance.There are five chapters in this article. At first it gives the research background,research status of DFH and multi-carrier communications. Secondly, it analyzesMB-MFSK communication system in the AWGN channel and Rayleigh channel.Thirdly, it proposes wide interval MB-MFSK communication system, which reduce theeffect of PBNJ. Then, it compares the continuous mapping and wide interval mappingMB-MFSK in the AWGN channel and Rayleigh fading channel with PBNJ. The resultshows that the wide interval mapping MB-MFSK performances better than thecontinuous mapping MB-MFSK system. At last, it summarizes the whole article, givesthe contribution and the direction of future research.