室内无线电信道延迟密度与自适应均衡

T. Sexton, K. Pahlavan
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引用次数: 2

摘要

作者分析了在室内无线电环境中使用决策反馈均衡器(DFE)的好处,并检查了不同信道建模的性能预测结果。具有二阶分集的QPSK/DFE调制解调器可以以比没有均衡的QPSK调制解调器高一个数量级的数据速率运行。一组给定的测量剖面的通道脉冲响应是解释使用两种不同的通道模型:连续和离散。在性能分析中,连续信道模型由唯一的延迟功率谱表示,而在离散信道建模中,信道由延迟功率谱的包络和路径的到达率表示
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Delay densities and adaptive equalization of indoor radio channels
The authors analyze the benefits of using a decision feedback equalizer (DFE) in the indoor radio environment and examine the results of performance predictions for different channel modelings. A QPSK/DFE modem with second-order diversity can operate at a data rate that is an order of magnitude higher than that of a QPSK modem without equalization. A given set of measured profiles of the channel impulse response is interpreted using two different channel models: continuous and discrete. In the performance analysis, the continuous channel model is represented by a unique delay power spectrum while in the discrete channel modeling the channel is represented by the envelope of the delay power spectrum and the arrival rate of the paths.<>
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