论文标题
部分可观测时空混沌系统的无模型预测
Analog Compressed Sensing for Sparse Frequency Shift Keying Modulation Schemes
论文作者
论文摘要
由于拥挤的频谱，对在宽带状态下运行的信号方案的兴趣越来越大。但是，宽带制度的缺点是获得通道状态信息的昂贵，并且先前使用的调制方案的能力（例如代码分割多重访问和正交频施加）的能力开始与无通道状态信息的容量绑定的能力分歧。冲动频移键合和宽带时间频率编码已显示在没有通道状态信息的情况下在宽带状态下表现良好，从而避免了与获取通道状态信息相关的成本和挑战。但是，最大似然接收器是一组频率选择的过滤器，由于大量过滤器，实施非常昂贵。在这项工作中，我们旨在通过使用带有芯片序列的模拟压缩感应接收器来简化接收器，以将信号与检测稀疏信号相关。我们的结果表明，使用压缩传感接收器可以简化模拟接收器，而恢复性能的略有降解也可以减少。对于固定的频率分离，符号时间和峰值SNR，对于相关信号数与频率数的固定比率，性能损失保持不变。
There is a growing interest in signaling schemes that operate in the wideband regime due to the crowded frequency spectrum. However, a downside of the wideband regime is that obtaining channel state information is costly, and the capacity of previously used modulation schemes such as code division multiple access and orthogonal frequency division multiplexing begins to diverge from the capacity bound without channel state information. Impulsive frequency shift keying and wideband time frequency coding have been shown to perform well in the wideband regime without channel state information, thus avoiding the costs and challenges associated with obtaining channel state information. However, the maximum likelihood receiver is a bank of frequency-selective filters, which is very costly to implement due to the large number of filters. In this work, we aim to simplify the receiver by using an analog compressed sensing receiver with chipping sequences as correlating signals to detect the sparse signals. Our results show that using a compressed sensing receiver allows for the simplification of the analog receiver with the trade off of a slight degradation in recovery performance. For a fixed frequency separation, symbol time, and peak SNR, the performance loss remains the same for a fixed ratio of number of correlating signals to the number of frequencies.
