基于PCIe接口的多径信道实时测量设备设计方法
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摘要
针对当前商用无线多径信道测量设备结构复杂、价格昂贵、灵活性不够的问题,提出了一种基于PCIe接口的软件化无线信道实时测量设备设计方法。该方法利用PCIe接口对接收到扩频测量信号进行获取,并利用多线程方式进行相关处理,具有实时测量的能力,可对无线信道多径特性开展实时测量,具有结构通用性好、测量算法改变灵活、信息存储量内容丰富和实时性较好的特点。给出了一个实际的研制案例,测试结果表明,该设计方法对于较低带宽的测量信号具有良好的适用性。
Aiming at the shortcomings of current commercial wireless multi-path channel sounder,such as complexity on structure,costliness and lack of agility,a design method of wireless multi-path channel sounder based on PCIe is proposed here. The proposed method captures the spectrum-spread signal and correlates it with local signal via multithreading method,so the method is universal on structure,agile for altering algorithm,rich on measurement information and has good real-time characteristic. Finally,an actual development case is given,and measurement results show that the proposed method is feasible and suitable for narrow-band signals.
Aiming at the shortcomings of current commercial wireless multi-path channel sounder,such as complexity on structure,costliness and lack of agility,a design method of wireless multi-path channel sounder based on PCIe is proposed here. The proposed method captures the spectrum-spread signal and correlates it with local signal via multithreading method,so the method is universal on structure,agile for altering algorithm,rich on measurement information and has good real-time characteristic. Finally,an actual development case is given,and measurement results show that the proposed method is feasible and suitable for narrow-band signals.
引文
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[2] ANDERSON H R,SC M,ENG P. A Ray-tracing Propagation Model for Digital Broadcast Systems in Urban Areas[J]. IEEE Transactions on Broadcasting,1993,39(3):309-317.
[3]王满喜,聂皞,孙武,等.复杂环境下电波传播损耗的测试与仿真[J].无线电工程,2012,42(3):47-50.
[4] GADWALV,BARRIOS A. Channel Modeling Using the Parabolic Equation for RF Communications[C]∥Conference of Military Communications,IEEE Conf.Pub,2009:1-6.
[5]王满喜,李永成,刘国柱,等.基于抛物方程的无线信道多径传输参数估算[J].无线电工程,2015,45(7):1-5.
[6]徐松毅,姜韬.散射信道测量方法研究[J].无线电通信技术,2003,3(4):19-23.
[7]张继良,汪洋,丁丽琴.6.0-6.4 GHz室内MIMO无线信道测量与传播特性分析[J].电子学报,2012,40(6):1213-1217.
[8]蒋培刚,汪少波,李化加.宽带无线信道测量仪的设计及应用[J].电信科学,2004(4):62-65.
[9]刘留,陶成,邱佳慧,等.高速铁路宽带无线信道测量方法研究[J].铁道学报,2011,33(5):49-53.
[10]庞宗山,李小民.基于DDST频域能量最大化的频偏估计方法[J].无线电通信技术,2011,37(1):62-64.
[11] DAVID L,KENNETH S.An FPGA-Based Adaptable 200MHz Bandwidth Channel Sounder for Wireless Communication Channel Characterisation[C]∥International Journal of Reconfigurable Computing,2011:1-14.
[12] KONISHIY,KIM M,GHORAISHI M,et al. Channel Sounding Technique Using MIMO SoftwareRadio Architecture[C]∥European Conference on Antennas and Propagation,2011:2546-2550.
[13] STUCKI A,JOURDAN P.MIMO Radio Channel Parameter Estimation Using the Initialization and Search Improved SAGE(ISIS)Algorithm[C]∥MPRG Symposium on Wireless Personal Communications,2003:1-8.
[14]闯跃龙,贾金原,刘金义.基于GPU加速的TIP技术[J].计算机辅助工程,2008,17(4):12-17.
[15]索东,高建瓴,王恒.基于GPU的数字信号处理中相关性计算的研究[J].贵州大学学报(自然科学版),2014,31(6):89-93.