Research On Multichannel Channelized Digital Receiver

The rapid development of modern communication technology puts higher requirements on receiver performance.In addition to requiring the receiver to have a wide bandwidth and a high data transmission rate,the receiver is required to have the ability to process multiple signals simultaneously.The multi-channel channelized digital receiver has excellent characteristics such as high precision,high flexibility,large dynamic range and small size,and can process multiple signals at the same time.It is a research hotspot in the field of radio communication,and its basic idea is to pass the mode.The Analog-to-Digital Converter(ADC)digitizes the signal received by the antenna so that it can implement a series of operations such as frequency conversion and filtering through digital signal processing technology,thereby forming a universal open programmable platform.This paper studies the design of multi-channel digital receiving UWB antenna and the structure design of channelized digital receiver.The content is as follows:(1)Design an ultra-wideband microstrip antenna as the RF front end of the receiver.The design center frequency is 10.525 GHz,using simulation software such as 3D electromagnetic field simulation software(CST)and Advanced Design System(ADS).Design antenna units and signal processing circuits,use AutoCAD software to draw layouts,and then make physical objects.After testing,the microstrip antenna designed in this paper can meet the system index requirements;(2)The channelization of the initial digital receiver mainly adopts the direct channelization method,and the channelized receiver of this structure has a very large amount of computation,and it is difficult to realize the structure of the existing device.In this paper,the basic structure of channelized digital receiver is studied.A structure of channelized digital receiver based on polyphase filter bank is proposed.The structure is simulated by MATLAB and the simulation results are analyzed in depth.(3)Based on the channelization structure of complex signal and real signal respectively,designing the source and polyphase filter bank,using MATLAB to design and simulate the channelization of multi-channel channelized digital receiver,from the simulation results It can be seen that the channelized digital receiver based on the polyphase filter bank designed in this paper can effectively realize the channelization of multiple channels and reduce the rate of each channel signal for subsequent processing.