一种基于SDR可重构多通道雷达发射机
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摘要
雷达侦察系统对于配套实验用雷达信号发射机往往需要可以同时发射多种参数、软件可配置的雷达信号。针对实际需求,提出了一种基于软件无线电(software defined radio,SDR)可重构多通道雷达发射机系统,该系统以SDR平台为构架,通过现场可编程门阵列(field-programmable gate array,FPGA)实现多通道数字信道化发射机结构模型。在建立实信号信道化发射机基本数学模型的基础上,推导并得到了一种具有计算高效、结构简单的多通道雷达发射机模型。在基于SCA软件协议规范下,构建了SDR可重构多通道的雷达发射机模型,给出了硬件软件实现的基本框架和步骤。对提出的多通道雷达发射机高效结构模型进行了MATLAB仿真,验证了多通道雷达发射机高效结构模型的正确性。该结构模型已经在实际系统中得以应用,在工程应用方面具有一定的实用价值。
Radar reconnaissance system requests that the supporting experimental radar transmitter can send radar signals which can simultaneously launch a variety of parameters and the software can be configured. Aiming at the actual demand, this paper proposed an SDR reconfigurable multi-channel radar transmitter system, which uses the SDR platform as a framework to realize the multi-channel digital channelized transmitter structure model by FPGA. Based on the basic mathematical model of the channelized transmitter for the input of real signal, the paper deduced a poly-phase filtering channelized radar transmitter model with high computational efficiency and simple structure. An SDR reconfigurable multi-channel radar transmitter model was built on basis of SCA architecture, the frameworks and steps of the hardware and software were given. A MATLAB simulation was carried out for the proposed multi-channel radar transmitter system model for verifying its correctness. The structure model has been applied in the practical system and has a certain practical value in engineering application.
Radar reconnaissance system requests that the supporting experimental radar transmitter can send radar signals which can simultaneously launch a variety of parameters and the software can be configured. Aiming at the actual demand, this paper proposed an SDR reconfigurable multi-channel radar transmitter system, which uses the SDR platform as a framework to realize the multi-channel digital channelized transmitter structure model by FPGA. Based on the basic mathematical model of the channelized transmitter for the input of real signal, the paper deduced a poly-phase filtering channelized radar transmitter model with high computational efficiency and simple structure. An SDR reconfigurable multi-channel radar transmitter model was built on basis of SCA architecture, the frameworks and steps of the hardware and software were given. A MATLAB simulation was carried out for the proposed multi-channel radar transmitter system model for verifying its correctness. The structure model has been applied in the practical system and has a certain practical value in engineering application.
引文
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[2]XU Shaojian,CHEN Bing,ZHANG Ping.Radarcommunication integration based on DSSS techniques[C]//Proceedings of the 8th International Conference on Signal Processing.Beijing,China,2006:16-20.
[3]楼才义,徐建良,杨小牛.软件无线电原理与应用[M].2版.北京:电子工业出版社,2014:129-139.
[4]胡广书.现代信号处理教程[M].2版.北京:清华大学出版社,2015:131-140.
[5]邓志民.多信道软件无线电发射机实现技术研究[D].哈尔滨:哈尔滨工程大学,2006:46-51.
[6]LIU Qing,CAO Kai,LAI Yingyong.FPGA software architecture for software defined radio[J].Procedia engineering,2012,29:2133–2139.
[7]WU Juhong,YANG Dong,CHEN Zengping.Design and application of multi-stage reconfigurable signal processing flow on FPGA[J].Computers and electrical engineering,2015,42:1–11.
[8]谭翔.基于SCA架构的So PC设计与实现[D].长沙:国防科学技术大学,2011:1-8.
[9]范建华,王晓波,李云洲.基于软件通信体系结构的软件定义无线电系统[J].清华大学学报:自然科学版,2011,52(8):1031–1037.
[10]许磊,苏涛.信道化发射机的FPGA实现[J].火控雷达技术,2010,39(4):36–41.
[11]西瑞克斯(北京)通信设备有限公司.无线通信中的MATLAB和FPGA实现[M].北京:人民邮电出版社,2009:54-78.
[12]潘玮.LPI雷达信号波形设计与分析[D].郑州:解放军信息工程大学,2012:1-15.
[13]张诚.宽带复杂雷达信号合成技术研究[D].西安:西安电子科技大学,2014:49-51.
[14]朱华,黄辉宁,李永庆,等.随机信号分析[M].北京:北京理工大学出版社,1990:186-187.