非信令测试下TD-LTE上行参数捕获方法
首发时间:2014-12-15
摘要:随着TD-LTE的商用和普及,其终端的快速测试显得愈发重要。目前,非信令测试已成为主流的终端测试技术。然而,在非信令测试下,上行信号同步、RB资源配比和调制方式等关键参数不能直接获取,使得EVM等关键指标的测试难以进行。本文在分析TD-LTE上行信号的子帧结构和特征基础上,提出了一种在非信令测试下捕获上行信号关键参数的方法,为后续测试提供了基础。在该方法中,使用了基于滑动相关的方法获得同步,通过D-spaced算法估计频偏,并采用了基于统计量的算法识别上行调制方式。最后,通过实际测试验证了方法的性能。
关键词: 非信令测试 上行参数捕获 同步 频偏估计 调制方式识别
For information in English, please click here
A capture method of TD-LTE Uplink Parameters Under Non-signaling Test
Abstract:With the commercialization of TD-LTE, the efficient test of TD-LET terminal is becoming increasing important. However, using current non-signaling test method, key parameters including resource block (RB) allocation and modulation format can not be obtained directly, making it hard to meature key performance indexes such as error vectro magnitude (EVM). In this paper, a series of algorithms are designed to acquire key parameters under non-signaling test considering LTE frame structure. Synchronization is realizd by a method based on correlation peak, frequency offset is estimated using D-spaced agorithm and modulation format recognition is conducted using a statistical moments based algorithm. Moreover, performance vadidation on pratical testbed is also provided.
Keywords: non-signaling test uplink parameter acquisition synchronization freqency offset estimation modulation recognition
基金:
论文图表:
引用
No.4622143101080014****
同行评议
勘误表
非信令测试下TD-LTE上行参数捕获方法
评论
全部评论