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Performance of fast frequency-hopped self-normalized BFSK receivers over Ricean fading channels with multitone interference

机译：具有多音干扰的莱斯衰落信道上快速跳频自归一化BFSK接收机的性能

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摘要

This thesis is an investigation of the performance of noncoherent self-normalized fast frequency-hopped binary frequency shift keying (FFH/BFSK) receivers under conditions of non-negligible thermal noise, band multitone interference and Ricean fading where both the information signal and interference tones are affected by channel fading. Since finding closed form expressions for the most general case of Ricean fading proved difficult, performance was evaluated for special cases of fading. The analysis assumed fixed jamming power and considered two general jamming strategies: jamming a fixed number of frequency-hop slots, and jamming a variable number depending on signal energy per hop. It was found that the degree of fading of the jamming tones had little effect on system performance. It was also found that the most effective jamming strategy depended on the degree of fading of the information signal and on the signal-to-thermal noise power ratio per hop. In general, two- fold diversity yields improved performance with respect to no diversity. When the information signal is Rayleigh faded and the signal power is greater than about 1% of total jamming power, higher diversities perform better than lower diversities. When the signal is Ricean faded, the effect of higher diversities depends on the signal power per hop-to-thermal noise power ratio, the degree of signal fading and on the ratio of signal power-to-total jamming power.
机译：本文研究了在信息信号和干扰音均不可忽略的热噪声，频带多音干扰和莱斯衰落条件下非相干自归一化快速跳频二进制频移键控（FFH / BFSK）接收机的性能。受信道衰落的影响。由于很难找到Ricean褪色最一般情况下的闭合形式表达式，因此对特殊情况下的褪色性能进行了评估。该分析假设固定的干扰功率，并考虑了两种通用的干扰策略：干扰固定数量的跳频时隙，以及根据每跳的信号能量干扰可变数量的干扰。已经发现，干扰音的衰减程度对系统性能几乎没有影响。还发现最有效的干扰策略取决于信息信号的衰落程度以及每跳的信噪比。通常，与没有多样性相比，两倍多样性可以提高性能。当信息信号被瑞利衰落并且信号功率大于总干扰功率的1％时，较高的分集比较低的分集要好。当信号被莱斯安衰落时，更高的分集效果取决于每跳与热噪声功率之比的信号功率，信号衰落的程度以及信号功率与总干扰功率之比。

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    Green Mary Ellen;

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  • 年度 1995
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