摘要
针对多微型飞行器的通信测控问题,研究了采用时空调制技术的MT-CDMA(Multitone CDMA)系统。设计了载有二维方向信息的信号,由地面基站激励一种8元稀疏阵列天线来发射。利用信号空间的特性,微型飞行器只需单天线接收便能解调出各自的通信和方向信息,从而该系统具有对多个微型飞行器同时实现通信、跟踪与测向功能,且具有测距、抗多径、抗多用户干扰的潜力。最后分析了该系统单用户在高斯信道下的误比特率和测向性能,并给出了仿真结果。
Aimed at the problem of communication and TTC （tracking telemetering and command） for multi-targets, a system of space-time modulation MT-CDMA is proposed. The designed signal, carrying 2-dimensional direction information, was transmitted by stimulating the eight-element sparse antenna array from a ground base.According to the characteristics of signal-space, a micro aerial vehicle only with signal antenna can accomplish communication and direction-finding by demodulating signals. So the system has the capacity of communicating, tracking and direction-finding with multi-target. What＇s more, this system has the potential of ranging, anti-multipath interference and multiuser interference. Finally the performance of bit-error-rate and direction-finding for single user were analyzed in AWGN channel.
出处
《苏州科技学院学报（自然科学版）》
CAS
2010年第1期47-51,共5页
Journal of Suzhou University of Science and Technology （Natural Science Edition）
基金
国家自然科学基金资助项目(60572108)
航空科学基金资助项目(20060152003)
