一种符号间干扰下的超宽带发射参考接收机
doi: 10.3724/SP.J.1146.2006.01518
A Ultra-wideband Transmitted-Reference Receiver under Inter-symbol Interference
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摘要: 该文在超宽带传统发射参考接收机的基础上，对时分多址方式下高数据传输速率时参考接收脉冲与数据接收脉冲波形都受到脉冲间干扰污染的相关接收机进行了分析，在此模型的基础上利用超宽带室内信道慢衰落的特点，采用少量无重叠的导频脉冲对模型系数进行估计，并用Volterra系统下的LMS算法进行跟踪。采用求根法对存在二阶符号间干扰的系统进行非线性均衡。用IEEE802.15.3a的室内多径信道模型仿真结果表明，采用该非线性均衡算法下接收机比线性均衡能更有效地克服符号间干扰。Abstract: Based on Ultra-WideBand (UWB) conventional Transmitted Reference (TR) technology, the interference model which reference and data receive waveforms are both contaminated by inter-pulse interference is analyzed relying on Time Division Multiple Access. On account of the slow varying character of the UWB channel, some non-overlapped pilot pulses are utilized to estimate the model coefficients, and the coefficients are tracked by Volterra LMS algorithm. A root method is adopted to equalize the second-order non-linear inter-symbol interference. Simulation result in IEEE 802.15.3as indoor multipath channel model shows that the non-linear equalization receiver can eliminate the ISI better than linear equalization receiver.
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