Applied polyphase filter orthogonal transformation technology in broadband signal receiving

Abstract

In view of the present mature simulation orthogonal transformation mostly belongs to the narrow band signal processing. And the digital processing method of Hilbert orthogonal transformation is limited by the bandwidth and cannot be used in broadband signal receiving. In this paper, application of the polyphase filtering orthogonal transformation method realized intermediate frequency spectrum broadband signal receiving in the front-end processing. This method is good at solving the problem of digital frequency conversion of orthogonal transformation in broadband signals and is suitable for implementation on FPGA and the engineering real-time processing.