| 105 | 2 | 14 |
| 下载次数 | 被引频次 | 阅读次数 |
针对现有卫星转发器带宽资源紧张的问题,在对成对载波多址技术(Paired Carrier Multiple Access,PCMA)的工作原理、关键技术和实现方式研究的基础之上,提出了一种基于FPGA的PCMA信号解调器实现方案。详细介绍了干扰抵消过程中所采用的参数估计等关键技术,并且利用迟早门电路进行了简化设计,给出了相应的Model Sim仿真和实现资源占用情况。通过卫星通信测试验证了该方案的可行性。
Abstract：Considering the spectrum resource shortage of transponders in satellite communication,a demodulator design based on FPGA is proposed by analyzing the operating principle,key technologies and implementing methods of Paired Carrier Multiple Access(PCMA).A detailed description of parameter estimation for interference cancelling is given.The early-late gates loop is introduced for simplifying this design.The Model Sim simulation and hardware resource occupation of this design are shown in this paper.Finally,the effectiveness of this design is verified by a series of satellite communication tests.
[1]DANKBERG M.Paired Carrier Multiple Access(PCMA)for Satellite Communication[C]∥First Presented At Pacific Telecommunication Conference,Honolulum Hawaii,1998:787-791.
[2]汪春霆,潘申富,易克初.一种双向链路频谱重叠共享频带的卫星通信系统[J].微波学报,2011,27(1):83-86.
[3]姚莳霖,陈惠民.卫星通信系统成对载波多址技术的应用[J].上海大学学报,2004,10(3):241-243.
[4]马计刚,刘同佩,陆健峰.PCMA卫星系统中信号抑制与同步技术[J].电讯技术,2005(3):152-154.
[5]潘申富.三种PCMA返回信号捕获方案分析与比较[J].无线电工程,2011,41(2):13-15.
[6]刘征,汪春霆.一种实现PCMA信号快速捕获的方法[J].无线电工程,2006,36(2):17-19.
[7]曾兴雯,刘乃安,孙献璞.扩展频谱通信及其多址技术[M].西安:西安电子科技大学出版社,2004.
[8]邵淑媛,张扬.成对载波多址系统中干扰信号延时的估计[J].信息与电子工程,2006,4(1):49-52.
[9]BIAN Dong-ming,ZHANG Geng-xin.A Maximum Likelihood Based Carrier Frequency Estimation Algorithm[C]∥Signal Processing Proceedings,WCCC-ICSP,5th International Conference,2000:185-188.
[10]公博,郭庆.PCMA系统自干扰频率估计新算法[J].通信技术,2010,43(11):37-39.
[11]CAOURAS N,MORAWSKI R,LE-NGOC T.Fast Carrier Recovery for Burst-mode Coherent Demodulation Using Feed-forward Phase and Frequency Estimation Techniques[C]∥Electrical and Computer Engineering,IEEE Canadian Conference,1999:79-83.
[12]付迪,高勇.非对称PCMA卫星信号的截获方法[J].现代电子技术,2007(7):28-30.
[13]潘申富,白栋,依那.成对载波多址系统中干扰信号幅度的估计[J].真空电子技术,2003(2):21-24.
[14]刘文峰.PCMA干扰抵消性能仿真[D].西安:西安电子科技大学,2008.
[15]田耘,徐文波,张延伟.无线通信FPGA设计[M].北京:电子工业出版社,2008.
基本信息:
DOI：
中图分类号:TN763;TN927.2
引用信息:
[1]权安,刘春冉.基于FPGA的PCMA解调器设计与实现[J].无线电工程,2017,47(05):111-114.
基金信息:
国家部委基金资助项目