摘要
随着城市轨道交通无线通信技术的发展,现有的测试仪器正面临着全面测试新需求的实时挑战。针对国内城市轨道交通无线局域网(WLAN)设备测试平台中多普勒效应测试的需求,以及信道仿真器带宽小且时延大的缺陷,提出了多普勒效应实时信道仿真的新方法。利用双路多普勒信道仿真模块构建了测试平台,并配合路径损耗电路实现WLAN系统在高速移动下的性能综合测试。通过实测得到结论:相同信噪比下,随着速度增加吞吐量略有下降;随着信噪比降低,吞吐量下降幅度越大。
With the development of railway transit wireless communication technology, the existing test platforms are facing challenges of real- time comprehensive experiment. Aiming at the demand for Doppler Effect testing in domes- tic railway transit WLAN equipment, the flaw of small bandwidth and large delay of the channel emulator, a novel approach for the real- time simulation of Doppler Effect channel is proposed. The Dual - Doppler channel emulators are used to build a testing platform, and then combined with the path loss circuit to implement the comprehensive performance test of WLAN system in high - speed environ- ment. The platform provides an integrated solution for sys- tem access test of WLAN system applied in railway transit.
出处
《城市轨道交通研究》
北大核心
2013年第2期34-37,共4页
Urban Mass Transit
基金
国家自然科学基金项目(61132003)
上海市重点学科项目(S30108)
