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快速跳频系统能减少干扰对系统性能带来的性能损伤.文中分析了快速跳频M元频移键控(FFH/MFSK)噪声归一化接收机在部分频带噪声干扰非频率选择性Rayleigh信道下的性能.不同于以往的研究结果,利用数值计算的方法来近似计算误比特率,文中采用复变函数的相关理论,给出了误比特率的闭合表达式.最后对系统性能进行了仿真,仿真结果与理论分析结果完全一致;系统性能不会随着分集度的不继增大而持续变好,而是存在一个最佳分集度;最佳分集度的大小随着信道条件的变化而不同;增大系统的调制阶数会提高系统性能.
The fast frequency-hopping system can reduce the performance damage caused by interference to the system performance.This paper analyzes the effect of fast frequency-hopping M-ary frequency shift keying (FFH / MFSK) noise normalization receiver in partial frequency band noise jamming on non-frequency selective Rayleigh channel Is different from the previous research results, the numerical calculation method is used to approximate the bit error rate, and the closed-form expression of the bit error rate is given by using the theory of complex function.Finally, the system performance is simulated , The simulation results are completely consistent with the theoretical analysis results. The system performance will not change continuously with the increasing of diversity degree, but there exists an optimal diversity degree. The optimal diversity degree varies with the channel conditions Different; increasing the modulation order of the system will improve the system performance.