穿戴式超宽带接收机误码率性能分析
发布时间：2019-04-22 15:23
【摘要】：为研究不同接收机的架构、收发天线的角度和判决方式对穿戴式超宽带(UWB)信道RAKE接收机误码率(BER)的影响,利用数字抽样示波器获取时域接收信号,使用CLEAN算法去卷积,得到体表-体表和体表-体外环境下人体信道冲激响应;并采用不同结构不同分支数的RAKE接收机对含有加性高斯噪声的跳时信号进行接收,以分析其对BER的影响。仿真结果表明,包含所有分支的RAKE接收机BER最低但结构复杂;在相同分支数下,包含部分分支的RAKE接收机的BER损失要比选择性RAKE接收机高3 d B,但复杂度较低。对收发天线不同角度的研究表明,收发天线应避免垂直,否则体表反射作用带来的多径分量增多,容易出现码间干扰,从而增加BER。在重复编码情况下,软判决的BER性能要优于硬判决0.2~0.4 d B。该信道模型和误码率分析研究可对穿戴式UWB收发机的架构设计和性能研究提供参考。
[Abstract]:In order to study the influence of receiving and receiving antenna angle and decision mode on bit error rate (BER) of wearable ultra-wideband (UWB) RAKE receiver, digital sampling oscilloscope is used to obtain received signal in time domain, and CLEAN algorithm is used to deconvolution. Body surface-body surface and body surface-in vitro environment to obtain the human channel impulse response; The RAKE receiver with different structure and number of branches is used to receive the time-hopping signal with additive Gao Si noise in order to analyze its influence on BER. The simulation results show that the BER of the RAKE receiver with all branches is the lowest but the structure is complex, and the BER loss of the RAKE receiver with partial branches is 3 dB higher than that of the selective RAKE receiver under the same number of branches, but the complexity is lower. The research on different angles of receiving and transmitting antenna shows that the receiving and transmitting antenna should avoid vertical, otherwise the multi-path component caused by body surface reflection is increased, and the inter-symbol interference is easy to appear, thus increasing the BER.. In the case of repeated coding, the BER performance of soft decision is better than that of hard decision 0.2 脳 0.4 dB. The channel model and bit error rate analysis can provide a reference for the architecture design and performance research of wearable UWB transceivers.
【作者单位】： 桂林电子科技大学信息与通信学院;
【基金】：国家自然科学基金资助项目(61264001,61166004,61161003) 广西自然科学基金资助项目(2013GXNSFAA019333) 桂林电子科技大学博士启动基金项目(UF12001Y) 桂林电子科技大学研究生教育创新计划资助项目(GDYCSZ201457)~~
【分类号】：TN851
本文编号：2462950
[Abstract]:In order to study the influence of receiving and receiving antenna angle and decision mode on bit error rate (BER) of wearable ultra-wideband (UWB) RAKE receiver, digital sampling oscilloscope is used to obtain received signal in time domain, and CLEAN algorithm is used to deconvolution. Body surface-body surface and body surface-in vitro environment to obtain the human channel impulse response; The RAKE receiver with different structure and number of branches is used to receive the time-hopping signal with additive Gao Si noise in order to analyze its influence on BER. The simulation results show that the BER of the RAKE receiver with all branches is the lowest but the structure is complex, and the BER loss of the RAKE receiver with partial branches is 3 dB higher than that of the selective RAKE receiver under the same number of branches, but the complexity is lower. The research on different angles of receiving and transmitting antenna shows that the receiving and transmitting antenna should avoid vertical, otherwise the multi-path component caused by body surface reflection is increased, and the inter-symbol interference is easy to appear, thus increasing the BER.. In the case of repeated coding, the BER performance of soft decision is better than that of hard decision 0.2 脳 0.4 dB. The channel model and bit error rate analysis can provide a reference for the architecture design and performance research of wearable UWB transceivers.
【作者单位】： 桂林电子科技大学信息与通信学院;
【基金】：国家自然科学基金资助项目(61264001,61166004,61161003) 广西自然科学基金资助项目(2013GXNSFAA019333) 桂林电子科技大学博士启动基金项目(UF12001Y) 桂林电子科技大学研究生教育创新计划资助项目(GDYCSZ201457)~~
【分类号】：TN851
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