通信学报 ›› 2018, Vol. 39 ›› Issue (7): 123-131.doi: 10.11959/j.issn.1000-436x.2018122

• 学术论文 • 上一篇    下一篇

抗多普勒频偏的多天线Chirp-BOK最佳随相检测方案

仇洪冰1,2,乔新宇1,2,郑霖1,2,3(),杨超1,2,姚伟伟1,2,张静3   

  1. 1 桂林电子科技大学信息与通信学院,广西 桂林 541004
    2 桂林电子科技大学广西无线宽带通信与信号处理重点实验室,广西 桂林 541004
    3 通信网信息传输与分发技术重点实验室,河北 石家庄 050081
  • 修回日期:2018-06-07 出版日期:2018-07-01 发布日期:2018-08-08
  • 作者简介:仇洪冰(1963-),男,江苏如皋人,博士,桂林电子科技大学教授、博士生导师,主要研究方向为无线通信、超宽带通信、无线传感网络。|乔新宇(1992-),男,满族,辽宁凌源人,桂林电子科技大学硕士生,主要研究方向为MIMO无线通信。|郑霖(1973-),男,安徽祁门人,博士,桂林电子科技大学教授,主要研究方向为无线宽带通信和定位、自适应信号处理、无线传感网络。|杨超(1988-),男,陕西西安人,桂林电子科技大学博士生,主要研究方向为无线通信、通信雷达一体化。|姚伟伟(1992-),男,浙江德清人,桂林电子科技大学硕士生,主要研究方向为通信雷达一体化。|张静(1981-),男,河北石家庄人,博士,通信网信息传输与分发技术重点实验室高级工程师,主要研究方向为卫星通信、软件无线电、认知无线电。
  • 基金资助:
    国家自然科学基金资助项目(61571143);国家自然科学基金资助项目(61371107);广西无线宽带通信与信号处理重点实验室基金资助项目(GXKL061501);通信网信息传输与分发技术重点实验室开放课题资助项目(KX172600033)

Optimal detection of random phase signal with Doppler frequency offset in Chirp-BOK multi-antenna system

Hongbing QIU1,2,Xinyu QIAO1,2,Lin ZHENG1,2,3(),Chao YANG1,2,Weiwei YAO1,2,Jing ZHANG3   

  1. 1 School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China
    2 Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,Guilin University of Electronic Technology,Guilin 541004,China
    3 Science and Technology on Communication Networks Laboratory,Shijiazhuang 050081,China
  • Revised:2018-06-07 Online:2018-07-01 Published:2018-08-08
  • Supported by:
    The National Natural Science Foundation of China(61571143);The National Natural Science Foundation of China(61371107);Guangxi Key Laboratory of Wideband Wireless Communications and Signal Processing Foundation(GXKL061501);Science and Technology on Communication Networks Laboratory Foundation(KX172600033)

摘要:

当信道存在多普勒频偏和相位噪声时,采用相干检测的 MIMO-OFDM 系统需要复杂和精确的频偏估计与多普勒补偿。为此,提出了一种多天线Chirp-BOK最佳随相检测方案,在保证抗干扰和抗频偏衰落的条件下,通过空分复用提高了系统容量。经推导,多天线Chirp-BOK系统的等效MIMO信道系数矩阵为实矩阵,从而降低了信道估计的复杂度,同时,也避免了检测受随机相位的影响。最后通过NI USRP-2942R平台搭建了2×2无线收发 MIMO-Chirp-BOK 验证系统。实测和仿真验证了所提系统具有低复杂度,对相偏、频偏不敏感的优点,并通过收发双天线获得了2倍的通信容量。

关键词: MIMO通信, Chirp-BOK调制, 非相干检测, 随相检测

Abstract:

When there are Doppler frequency deviation and phase noise in channel,the MIMO-OFDM system with coherent detection requires complicated and accurate frequency offset estimation and Doppler compensation.Based on this,an optimal random phase detection was proposed in multi-antenna Chirp-BOK system,which improved the system capacity by space division multiplexing in the condition of anti-interference and anti-frequency deviation.The equivalent MIMO channel coefficient matrix of multi-antenna Chirp-BOK system was derived as a real matrix,so as to reduce the complexity of channel estimation and avoid to be affected by random phase.A two plus two wireless transceiver system was built on the NI USRP-2942R platform.Simulation and experiment results show that the MIMO-Chirp-BOK system inherits the advantages of low complexity,insensitivity to phase shift and frequency offset of Chirp-BOK communication system.It achieves multiplied communication capacity by increasing the number of antennas.

Key words: MIMO communication, Chirp-BOK modulation, non-coherent detection, random phase detection

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