The effect of Rician fading and partial-band interference on noise-normalized, fast frequency-hopped MFSK receivers

Proceedings of MILCOM '93 - IEEE Military Communications Conference Pub Date : 1993-10-11 DOI:10.1109/MILCOM.1993.408524

M. Kragh, R. Robertson

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引用次数: 3

Abstract

The performance of an M-ary orthogonal frequency-shift keying (MFSK) communication system using fast frequency-hopped spread spectrum waveforms transmitted over a frequency-nonselective, slowly fading channel with partial-band interference is analyzed. A procedure referred to as noise-normalization combining is used by the system receiver to minimize partial-band interference effects. Each hop is assumed to fade independently. The partial-band interference is modeled as a Gaussian process. Both the signal and the partial-band interference are assumed to be affected by the fading channel which is modeled as Rician. The effect of fading of the partial-band interference on worst-case receiver performance is relatively minor. When there is no signal fading or when the signal facing is Rician, the counter-intuitive result of poorer receiver performance when the partial-band interference experiences fading is obtained. This effect is most pronounced when the signal does not fade and the partial-band interference experiences Rayleigh fading.<>

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噪声归一化、快速跳频MFSK接收机的时域衰落和部分频带干扰影响

分析了在非频率选择、部分频带干扰的慢衰落信道上采用快速跳频扩频波形传输的正交移频键控通信系统的性能。系统接收机使用一种称为噪声归一化组合的程序来最小化部分频带干扰的影响。假设每一跳都独立淡出。部分带干扰用高斯过程建模。假设信号和部分频带干扰都受到衰落信道的影响，衰落信道被建模为r。部分频带干扰的衰落对最坏情况下接收机性能的影响相对较小。当信号没有衰落或面对的信号很陡时，得到了部分频带干扰衰落时接收机性能较差的反直觉结果。当信号不衰减且部分频带干扰经历瑞利衰减时，这种效应最为明显

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Proceedings of MILCOM '93 - IEEE Military Communications Conference

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