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为了解决传统邻道干扰模型与测试数据对比误差较大的难题,将接收机射频前端的非线性响应模型和信噪比模型相融合,考虑到邻道干扰信号与本振相位噪声混频而产生的噪声,提出了噪声修正因子,进一步建立了超短波(VHF)电台接收机邻道干扰减敏模型,与典型实装测试数据相对比误差约为3 d B,表明本文方法能够很好地描述邻道干扰的减敏特性。利用本文模型给出了机载超短波电台邻道干扰评估方法,结合直升机编队飞行时电台邻道干扰评估案例,验证了本文方法的适用性和有效性,具有一定的工程应用价值。
In order to solve the problem that the contrast between the traditional adjacent channel interference model and the test data is relatively large, the non-linear response model of the receiver’s RF front end is merged with the signal-to-noise ratio model, and the adjacent channel interference signal is mixed with the local phase noise The noise correction factor is proposed and the receiver adjacent channel interference desensitization model of VHF receiver is further established. Compared with the typical test data, the relative error is about 3 d B, which shows that the proposed method can describe neighbor Road deactivation of the desensitization characteristics. Using the model presented in this paper, the method of adjacent channel interference assessment for airborne VHF radio stations is given. Combined with the assessment of adjacent channel interference of helicopters in formation flight, the applicability and effectiveness of the proposed method are verified, and it has certain engineering application value.