应用于宽带信号接收的多相滤波正交变换技术

针对目前成熟的模拟正交变换处理的信号大多属于窄带信号,而数字处理方法中的希尔伯特正交变换受到带宽限制,不能很好地应用于中频宽带信号的接收。提出应用多相滤波正交变换的方法实现中频频段宽带信号的接收前端处理。该方法可很好地解决宽带接收信号的数字下变频正交变换的问题,并且适合在FPGA上实现,应用于工程实时处理。

Poly-phase filtering orthogonal transformation technology applied to broadband signal receiving

Since the signals processed by present mature simulation orthogonal transformation technology mostly belong to the narrow band signal,and Hilbert orthogonal transformation in the digital processing method is limited by bandwidth and can＆#39;t be used in reception of the medium-frequency broadband signal,the method of using the poly-phase filtering orthogonal transfor-mation to realize the receiving front-end processing of the medium-frequency broadband signal is proposed in this paper. This method is good for solving the problem of digital frequency conversion’s orthogonal transformation of broadband received signals and is suitable for implementation on FPGA and real-time processing in engineering.