Implementation Technology Of Channelized Software Radio Receiver

Along with the new era of 4G mobile communication to the full application, the amount of communication services and mobile users will be increased,so the base station of wireless mobile communication not only needs to improve the data transmission rate and guarantee the reliability of the communication system,but also needs to have the ability to simultaneously receive multiple users. Based on this,this paper studies the realization technology of digital channel receiver based on software radio. Digital channel receiver has the advantages of large instantaneous bandwidth, large dynamic range, high frequency measurement accuracy, high sensitivity and simultaneously processing multiple received signals, it is widely used in the wireless communication field.This paper is based on foundational theories in software radio, such as sampling theory,integer decimation theory and the poly phase filter theory. First, this paper discusses the principle of the software radio digital down conversion and analysis the principle of the numerical control oscillator and multi-stage extraction filter. It also establishes the digital down conversion system based on 64QAM modulation signal and uses the Simulink module to analysis the each module as well as the overall system simulation of the digital down conversion. Secondly, this paper analyzes high efficiency structure based on ploy phase filter for channelized receiver in different channel division of the complex and real signal, based on this, the channelized structure of the receiver based on the instantaneous frequency measurement (IFM) and the weighted overlap add (WOLA) filter banks is discussed, and the performance of the receiver is analyzed by MATLAB programming to verify the correctness and feasibility of the receiver system. Finally, the structure of based on the digital down conversion and poly phase filter bank is established. During the design scheme of the intermediate frequency channelized receiver system, the system is simulated and analyzed by MATLAB programming, and the FPGA design and implementation of each module in the system scheme, the top-down design idea is used and the top module is established to design and implemention of the intermediate frequency channelized receiver system, and the hardware description language Verilog is utilized under the environment of the EDA tools ISE and Modelsim to complete the system function simulation.In this paper,it proposed a new method for the implementation scheme of the intermediate frequency channelized receiver,and analysis the simulation results of system on the MATLAB platform as same as the expected design requirements to verify the correctness of the design scheme. It also achieves the hardware simulation of the intermediate frequency channelized receiver system in the FPGA universal hardware platform and it is further beneficial the design and application of practical engineering.