High-speed ultrawideband photonically enabled compressed sensing of sparse radio frequency signals
High-speed ultrawideband photonically enabled compressed sensing of sparse radio frequency signals
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DOI：
10.1364/ol.38.004892
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发表时间：
2013-11-15
期刊：
影响因子：
3.6
通讯作者：
Foster, Mark A.
中科院分区：
文献类型：
--
作者：
Bosworth, Bryan T.;Foster, Mark A.
我们展示了一种使用超快激光脉冲进行啁啾处理的高速压缩传感新架构，目前应用于稀疏频率微波信号的测量。我们用伪随机比特序列对高啁啾超快激光脉冲进行频谱编码，使每个激光脉冲获得唯一的光谱模式。对脉冲进行部分时间压缩，使有效采样率超出电子极限，然后用稀疏的微波信号进行调制。最后对脉冲进行充分压缩和检测，有效地集成了测量结果。我们在重建的微波光谱中实现了100个点，每个模式实现了100个可用特征，并通过实验证明了900 MHz至14.76 GHz范围内的二音和三音微波信号的重建。利用500 MHz实时示波器，通过测量单次采集的23 ~ 38个连续激光脉冲的能量，重建了这些光谱。(C) 2013年美国光学学会
We demonstrate a new architecture for high-speed compressed sensing using chirp processing with ultrafast laser pulses, presently applied to the measurement of sparse-frequency microwave signals. We spectrally encode highly chirped ultrafast laser pulses with pseudorandom bit sequences such that every laser pulse acquires a unique spectral pattern. The pulses are partially compressed in time, extending the effective sampling rate beyond the electronic limit, and then modulated with a sparse microwave signal. Finally the pulses are fully compressed and detected, effectively integrating the measurement. We achieve 100 usable features per pattern allowing for 100 points in the reconstructed microwave spectra and experimentally demonstrate reconstruction of two-and three-tone microwave signals spanning from 900 MHz to 14.76 GHz. These spectra are reconstructed by measuring the energy of only 23 to 38 consecutive laser pulses acquired in a single shot with a 500 MHz real-time oscilloscope. (C) 2013 Optical Society of America