变速率基带脉冲成形滤波技术
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摘要
无线信道带宽资源有限,为了抑制码间干扰并提高频带利用率,必须对基带脉冲信号进行成形滤波。针对常规的查表法和可变插值滤波器法存在硬件资源消耗大和无法适应数据速率连续变化的问题,给出了一种改进方法;首先对待成形滤波的数据进行变速率降采样处理,经过FIR成形滤波器,最后通过变速率线性内插完成上采样处理。理论推导和仿真均验证了方法的有效性。该方法易于FPGA实现,相对常规方法降低了实现复杂度和硬件资源,通过实测验证了方法可行性,并成功应用于某空间型号。
he wireless channel bandwidth resources are limited. In order to restrain inter-symbol interference and increase the spectral efficiency,the shaping filtering of baseband pulse signal is necessary.Be directed against the problem that conventional techniques have the disadvantage of occupying massive resource and inflexibility,a modified technique is proposed. The data is down sampled and filtered by a FIR. The data are up sampled through variable rate linear interpolation. This method is easy to implement in FPGA. Compared with conventional methods,it reduces the complexity of implementation and hardware resources. The feasibility of this method is verified by actual measurement,and applied to some spaceflight simulator successfully.
he wireless channel bandwidth resources are limited. In order to restrain inter-symbol interference and increase the spectral efficiency,the shaping filtering of baseband pulse signal is necessary.Be directed against the problem that conventional techniques have the disadvantage of occupying massive resource and inflexibility,a modified technique is proposed. The data is down sampled and filtered by a FIR. The data are up sampled through variable rate linear interpolation. This method is easy to implement in FPGA. Compared with conventional methods,it reduces the complexity of implementation and hardware resources. The feasibility of this method is verified by actual measurement,and applied to some spaceflight simulator successfully.
引文
[1]罗常青,沈业兵,王爱华.基带内插脉冲成形滤波器的FPGA实现[J].电光与控制,2007,14(4):147-150.LUO Chang-qing,SHEN Ye-bing,WANG Ai-hua. FPGA Realization of Based Band Interpolator Pulse Shaping Filters[J]. Electronics Optics and Control,2007,14(4):147-150.
[2]朱敏.卫星数据采集系统远端站的设计与实现[D].上海:上海交通大学,2005.ZHU Min. The Research and Implementation of Remote Station in Satellite Data Collection System[D]. Shanghai:Shanghai Jiaotong University,2005.
[3]习郑虎.多制式数字基带信号发生技术[D].太原:中北大学,2011.XI Zheng-hu. Multi-Standard Digital Baseband Signal Generate Technology Abstract[D]. Taiyuan:North University of China,2011.
[4]郑应强,张振仁.基于多相结构的内插脉冲成形滤波器的DSP实现[J].电力系统及其自动化学报,2004,16(5):66-69.ZHENG Ying-qiang,ZHANG Zhen-ren. Implementation of Pulse Shaping Filter Based on Multi-Phase Structure[J]. Proceedings of the CSU 2EPSA,2004,16(5):66-69.
[5]赵林军.根升余弦脉冲成形滤波器FPGA实现[J].现代电子技术,2011,34(1):23-25.ZHAO Lin-jun. FPGA Implementation of Square Root Raised Cosine Pulse Shaping Filter[J]. Modern Electronics Technique,2011,34(1):23-25.
[6]陈婷.基于FPGA的高速并行多速率信号处理技术[D].西安:西安电子科技大学,2013.CHEN Ting. High-Speed Parallel Multi-Rate Signal Processing Techniques Based on FPGA[D]. Xi'an:Xidian University,2013.
[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):90-93.LI Ai-hong,XIAO Shan-zhu,ZHANG Chen,et al. Design and Implementation of High Speed Pulse Shaped Filter[J]. Journal of Circuits and Systems,2006,11(5):90-93.
[8]喻应芝,王爱华,周荣花.基于现场可编程器件的全数字成形滤波器实现[J].北京理工大学学报,2003,23(5):609-612.YU Ying-zhi,WANG Ai-hua,ZHOU Rong-hua. Implementation of Digital Shaping Filters with Field Programmable Gate Arrays[J]. Journal of Beijing Institute of Technology,2003,23(5):609-612.
[9]刘红宇,朱江,张尔扬.卫星高速8PSK调制器中成形滤波器设计及其基于并行查表的FPGA实现查表法[J].飞行器测控学报,2006,25(1):57-60.LIU Hong-yu,ZHU Jiang,ZHANG Er-yang. Design of Shaping Filter for High Speed 8PSK Modulator and FPGA Implementation Based on Parallel Look-up Table[J]. Journal of Spacecraft TT&C Technology,2006,25(1):57-60.
[10]刘瑞强,景新幸.一种升余弦成形滤波器的设计[J].现代电子技术,2006(13):51-53.LIU Rui-qiang,JING Xin-xing. A Sort of Raise Cosine Filter Design[J]. Modern Electronics Technique,2006(13):51-53.
[11]山蕊,蒋林,杜慧敏.平方根升余弦滤波器的设计与FPGA实现[J].西安邮电学院学报,2011,16(3):30-33.SHAN Rui,JIANG Lin,DU Hui-min. Two Square-Root Raised Cosine Filter Based on FPGA[J]. Journal of Xi'an University of Posts and Telecommunications,2011,16(3):30-33.
[12]张旭,熊建林,郑戈.星载多体制变速率高速数字成形滤波器设计[J].遥测遥控,2016,37(2):6-12.ZHANG Xu,XIONG Jian-lin,ZHENG Ge. Design of Space Borne High-Speed Digital Shaping Filter for MultiModulation and Variable-Rate Signals[J]. Journal of Telemetry,Tracking and Command,2016,37(2):6-12.
[13]刘志鹏,孙延坤,刘轶铭,等.基于多路合成的π/4QPSK的设计与实现[J].中国电子科学院学报,2016,11(6):642-648.LIU Zhi-peng,SUN Yan-kun,LIU Yi-ming,et al. Design and Realization of Multi-Channelsπ/4 QPSK[J]. Journal of CAEIT,2016,11(6):642-648.
[14]吉训生,杨永杰.滤波器多相结构的FPGA实现[J].南通工学院学报:自然科学版,2002,1(3):48-51.JI Xun-sheng,YANG Yong-jie. A Poly-phase Filter Structure Implemented by Using FPGA[J]. Journal of Nantong Institute of Technology:Natural Science ed,2002,1(3):48-51.
[15]谢旻睿,沈志博.一种基于多相滤波结构的雷达信号检测技术[J].电子科技,2012,25(6):118-124.XIE Min-rui,SHEN Zhi-bo. A Method for Radar Signal Detection Based on Poly-Phase Filtering[J]. Electronic Sci.&Tech,2012,25(6):118-124.
[2]朱敏.卫星数据采集系统远端站的设计与实现[D].上海:上海交通大学,2005.ZHU Min. The Research and Implementation of Remote Station in Satellite Data Collection System[D]. Shanghai:Shanghai Jiaotong University,2005.
[3]习郑虎.多制式数字基带信号发生技术[D].太原:中北大学,2011.XI Zheng-hu. Multi-Standard Digital Baseband Signal Generate Technology Abstract[D]. Taiyuan:North University of China,2011.
[4]郑应强,张振仁.基于多相结构的内插脉冲成形滤波器的DSP实现[J].电力系统及其自动化学报,2004,16(5):66-69.ZHENG Ying-qiang,ZHANG Zhen-ren. Implementation of Pulse Shaping Filter Based on Multi-Phase Structure[J]. Proceedings of the CSU 2EPSA,2004,16(5):66-69.
[5]赵林军.根升余弦脉冲成形滤波器FPGA实现[J].现代电子技术,2011,34(1):23-25.ZHAO Lin-jun. FPGA Implementation of Square Root Raised Cosine Pulse Shaping Filter[J]. Modern Electronics Technique,2011,34(1):23-25.
[6]陈婷.基于FPGA的高速并行多速率信号处理技术[D].西安:西安电子科技大学,2013.CHEN Ting. High-Speed Parallel Multi-Rate Signal Processing Techniques Based on FPGA[D]. Xi'an:Xidian University,2013.
[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):90-93.LI Ai-hong,XIAO Shan-zhu,ZHANG Chen,et al. Design and Implementation of High Speed Pulse Shaped Filter[J]. Journal of Circuits and Systems,2006,11(5):90-93.
[8]喻应芝,王爱华,周荣花.基于现场可编程器件的全数字成形滤波器实现[J].北京理工大学学报,2003,23(5):609-612.YU Ying-zhi,WANG Ai-hua,ZHOU Rong-hua. Implementation of Digital Shaping Filters with Field Programmable Gate Arrays[J]. Journal of Beijing Institute of Technology,2003,23(5):609-612.
[9]刘红宇,朱江,张尔扬.卫星高速8PSK调制器中成形滤波器设计及其基于并行查表的FPGA实现查表法[J].飞行器测控学报,2006,25(1):57-60.LIU Hong-yu,ZHU Jiang,ZHANG Er-yang. Design of Shaping Filter for High Speed 8PSK Modulator and FPGA Implementation Based on Parallel Look-up Table[J]. Journal of Spacecraft TT&C Technology,2006,25(1):57-60.
[10]刘瑞强,景新幸.一种升余弦成形滤波器的设计[J].现代电子技术,2006(13):51-53.LIU Rui-qiang,JING Xin-xing. A Sort of Raise Cosine Filter Design[J]. Modern Electronics Technique,2006(13):51-53.
[11]山蕊,蒋林,杜慧敏.平方根升余弦滤波器的设计与FPGA实现[J].西安邮电学院学报,2011,16(3):30-33.SHAN Rui,JIANG Lin,DU Hui-min. Two Square-Root Raised Cosine Filter Based on FPGA[J]. Journal of Xi'an University of Posts and Telecommunications,2011,16(3):30-33.
[12]张旭,熊建林,郑戈.星载多体制变速率高速数字成形滤波器设计[J].遥测遥控,2016,37(2):6-12.ZHANG Xu,XIONG Jian-lin,ZHENG Ge. Design of Space Borne High-Speed Digital Shaping Filter for MultiModulation and Variable-Rate Signals[J]. Journal of Telemetry,Tracking and Command,2016,37(2):6-12.
[13]刘志鹏,孙延坤,刘轶铭,等.基于多路合成的π/4QPSK的设计与实现[J].中国电子科学院学报,2016,11(6):642-648.LIU Zhi-peng,SUN Yan-kun,LIU Yi-ming,et al. Design and Realization of Multi-Channelsπ/4 QPSK[J]. Journal of CAEIT,2016,11(6):642-648.
[14]吉训生,杨永杰.滤波器多相结构的FPGA实现[J].南通工学院学报:自然科学版,2002,1(3):48-51.JI Xun-sheng,YANG Yong-jie. A Poly-phase Filter Structure Implemented by Using FPGA[J]. Journal of Nantong Institute of Technology:Natural Science ed,2002,1(3):48-51.
[15]谢旻睿,沈志博.一种基于多相滤波结构的雷达信号检测技术[J].电子科技,2012,25(6):118-124.XIE Min-rui,SHEN Zhi-bo. A Method for Radar Signal Detection Based on Poly-Phase Filtering[J]. Electronic Sci.&Tech,2012,25(6):118-124.