高速可变速率QPSK模拟源设计与实现
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摘要
通信系统带宽与速率逐步提高,要求与之匹配的模拟源速率相应提高。介绍一种高速且可变速率的QPSK调制模拟源的实现方案,数据速率为20~600 Mbps且每bit可变。详细描述了核心并行数控振荡器(NCO)及成型滤波模块的设计与实现,对工程应用以及测试结果进行了分析。结果表明模拟源各项功能指标达到了设计要求,设计灵活,可扩展性强,满足多速率通信系统的测试要求。
The bandwidth and data rate of communication systems are gradually increasing,which requires a corresponding increase in the rate of the simulating source. The implementation scheme of a high and variable data rate QPSK simulating source is introduced,in which the data rate changes from 20 to 600 Mbps with an accuracy of one bit.The design and implementation of the core module including the parallel numerical controlled oscillator and the shaping filter are described in detail.The system engineering applications and test results are analyzed.The results show that the function specifications of the simulating source meet the design requirements.The system is flexible and easily expanded,which meets the test requirements of multi-rate communication system.
The bandwidth and data rate of communication systems are gradually increasing,which requires a corresponding increase in the rate of the simulating source. The implementation scheme of a high and variable data rate QPSK simulating source is introduced,in which the data rate changes from 20 to 600 Mbps with an accuracy of one bit.The design and implementation of the core module including the parallel numerical controlled oscillator and the shaping filter are described in detail.The system engineering applications and test results are analyzed.The results show that the function specifications of the simulating source meet the design requirements.The system is flexible and easily expanded,which meets the test requirements of multi-rate communication system.
引文
[1]郝英川,吴海燕.采用FPGA实现突发QPSK调制器[J].无线电工程,2007,37(1):59-60.
[2]邓建华.高速数传系统中的直接数字射频调制解调技术[D].成都:电子科技大学,2003.
[3]费义伟.基于FPGA的调制解调器的设计[D].哈尔滨:哈尔滨工业大学,2007.
[4]窦宇洋.卫星通信中的高速数传调制技术研究[D].长沙:国防科学技术大学,2003.
[5]皇甫堪,陈建文,楼生强.现代数字信号处理[M].北京:电子工业出版社,2003:401-475.
[6]张松轶.基于FPGA的平方根升余弦滤波器设计[J].无线电通信技术,2012,38(3):43-46.
[7]李爱红,肖山竹,张琛,等.高速成形滤波器的设计与实现[J].电路与系统学报,2006,11(5):90-92.
[8]张琛,朱江,张尔扬.高速数传系统中成形滤波器的研究[J].通信技术,2002(10):18-19.
[9]杨小牛,楼才义,徐建良.软件无线电原理与应用[M].北京:电子工业出版社,2001:8-57.
[10]陈东华.升余弦滚降基带成形内插滤波器的FPGA实现[J].华侨大学学报,2006,27(3):310-312.
[11]张维良,郭兴波,潘长勇.平方根升余弦滚降FIR数字滤波器的设计[J].电讯技术,2002(6):51-55.
[12]张建伟,展雪梅.FIR数字滤波器的设计与实现[J].无线电工程,2010,40(6):54-56.
[2]邓建华.高速数传系统中的直接数字射频调制解调技术[D].成都:电子科技大学,2003.
[3]费义伟.基于FPGA的调制解调器的设计[D].哈尔滨:哈尔滨工业大学,2007.
[4]窦宇洋.卫星通信中的高速数传调制技术研究[D].长沙:国防科学技术大学,2003.
[5]皇甫堪,陈建文,楼生强.现代数字信号处理[M].北京:电子工业出版社,2003:401-475.
[6]张松轶.基于FPGA的平方根升余弦滤波器设计[J].无线电通信技术,2012,38(3):43-46.
[7]李爱红,肖山竹,张琛,等.高速成形滤波器的设计与实现[J].电路与系统学报,2006,11(5):90-92.
[8]张琛,朱江,张尔扬.高速数传系统中成形滤波器的研究[J].通信技术,2002(10):18-19.
[9]杨小牛,楼才义,徐建良.软件无线电原理与应用[M].北京:电子工业出版社,2001:8-57.
[10]陈东华.升余弦滚降基带成形内插滤波器的FPGA实现[J].华侨大学学报,2006,27(3):310-312.
[11]张维良,郭兴波,潘长勇.平方根升余弦滚降FIR数字滤波器的设计[J].电讯技术,2002(6):51-55.
[12]张建伟,展雪梅.FIR数字滤波器的设计与实现[J].无线电工程,2010,40(6):54-56.