一种基于数字接收机的信号调制方式识别技术
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摘要
针对侦察接收机信号调制模式识别问题,提出一种基于全数字接收机理论的信号调制方式识别技术,结合AGC、FFT、位同步环和载波跟踪环技术,能够有效识别输入信号强度、载波频率动态变化的BPSK、QPSK和FSK信号。利用载波跟踪环路频率跟踪曲线完成FSK和PSK识别,利用解调的基带数据完成BPSK和QPSK识别。在Altera公司的Stratix II器件EP2S180F1020C4上利用该方法完成实现,并对中国电子集团提供的空口信号进行识别验证。理论分析和仿真结果表明,该方法在保证识别率的同时可降低算法复杂度,易于硬件实现。
In this paper a signal modulation pattern recognition technology based on all-digital receiver theory is proposed to solve the signal pattern recognition problem in reconnaissance receivers. The proposed method combines AGC,FFT,bit synchronization loop and carrier tracking loop technology,and can identify BPSK,QPSK,and FSK signals with dynamic input energy and carrier frequen?cy. The proposed method utilizes the frequency tracking curve of the carrier tracking loop to identify the FSK and PSK signal,and then uses the demodulated baseband data to complete the identification of BPSK and QPSK signal. The proposed method has been imple?mented on Altera's Stratix II device EP2 S180 F1020 C4,and verified the air interface signal provided by China Electronics Group. Theo?retical analysis and simulation results show that the proposed scheme reduces the complexity of the algorithm while ensuring the recog?nition rate,and it is easy to implement in hardware.
In this paper a signal modulation pattern recognition technology based on all-digital receiver theory is proposed to solve the signal pattern recognition problem in reconnaissance receivers. The proposed method combines AGC,FFT,bit synchronization loop and carrier tracking loop technology,and can identify BPSK,QPSK,and FSK signals with dynamic input energy and carrier frequen?cy. The proposed method utilizes the frequency tracking curve of the carrier tracking loop to identify the FSK and PSK signal,and then uses the demodulated baseband data to complete the identification of BPSK and QPSK signal. The proposed method has been imple?mented on Altera's Stratix II device EP2 S180 F1020 C4,and verified the air interface signal provided by China Electronics Group. Theo?retical analysis and simulation results show that the proposed scheme reduces the complexity of the algorithm while ensuring the recog?nition rate,and it is easy to implement in hardware.
引文
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[17]汪国强,曹亮,张风环,等.基于FPGA的Costas环法BPSK信号解调的设计及实现[J].黑龙江大学工程学报,2013,4(3):76-81.
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[19]周凡,郑林华,陶文祥.基于叉积鉴频器的π/4-QPSK信号数字化解调[J].遥测遥控,2017,38(2):49-55.
[20]樊昌信,曹丽娜.通信原理[M].北京:国防工业出版社,2014.
[2]郭淑霞,陈志坤,罗荣慧.频带自适应调制模式识别方法研究[J].计算机仿真,2009,26(3):26-29.
[3]程聪.基于星座点分布的TDM-OFDM自适应调制识别算法[J].系统仿真技术,2015,11(2):137-143.
[4]李世杰,郭雁,叶永杰.基于星座图的数字调制信号识别技术[J].通信对抗,2016(1):16-19.
[5]郭娟娟,尹洪东,姜璐,等.利用高阶累积量实现数字调制信号的识别[J].通信技术,2014(11):1255-1260.
[6]李彦栓,罗明,李霞.基于高阶累积量的OFDM信号调制识别技术[J].电子信息对抗技术,2012,27(4):1-4.
[7]伍丹,吴玉成,刘阳,等.数字接收机中自动增益控制技术设计[J].微计算机信息,2010,26(19):138-139.
[8]蒋亚武,季晓勇.一种用于软件无线电中的AGC技术[J].微处理机,2007,28(4):73-74.
[9]马恒.认知无线电中频谱检测技术研究[J].无线电工程,2014(3):77-80.
[10]刘伟,姚远程,秦明伟.一种改进的Gardner定时同步算法[J].计算机工程,2013,39(11):299-302.
[11]吉翠钗.高速(6Mbit/s)位同步器的研究与实现[D].成都:电子科技大学,2005.
[12]邱致和,王万义.GPS原理与应用[M].北京:电子工业出版社,2002.
[13]凌康,王亮,周祖成.一种QPSK位同步电路的设计[J].微计算机信息,2007,23(29):233-235.
[14]杜勇.锁相环技术原理及FPGA实现[M].北京:电子工业出版社,2016.
[15]宋文姝,张天骐,林孝康.一种QPSK全数字化载波频偏估计算法[J].电路与系统学报,2008,13(4):112-115.
[16]陈荣,管吉兴,张喜明.数字Costas环的设计与实现[J].无线电工程,2010,40(3):24-26.
[17]汪国强,曹亮,张风环,等.基于FPGA的Costas环法BPSK信号解调的设计及实现[J].黑龙江大学工程学报,2013,4(3):76-81.
[18]楼才义,徐建良,杨小牛.软件无线电原理与应用[M].北京:电子工业出版社,2014.
[19]周凡,郑林华,陶文祥.基于叉积鉴频器的π/4-QPSK信号数字化解调[J].遥测遥控,2017,38(2):49-55.
[20]樊昌信,曹丽娜.通信原理[M].北京:国防工业出版社,2014.