Time-stretched short-time Fourier transform

被引：24
|
作者：
Nuruzzaman, A [1 ]
Boyraz, O
Jalali, B
机构：
[1] Univ Calif Los Angeles, Dept Elect Engn, Optoelect Circuits & Syst Lab, Los Angeles, CA 90095 USA
[2] Univ Calif Irvine, Dept Elect Engn & Comp Sci, Irvine, CA USA
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2006年 / 55卷 / 02期
关键词：
analog-digital converter (ADC); optical analog-digital conversion; optical quantization; optical sampling; optical signal processing; photonic time stretching; short-time Fourier transform (STFT); time stretch;
D O I：
10.1109/TIM.2006.864246
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The authors propose and demonstrate the time-stretched short-time Fourier transform (TS-STFT) technique to overcome the limitation of an analog-digital converter (ADC) in the time-frequency analysis of ultrafast signals. Experimentally, the time-frequency analysis of highly chirped RF signals, with a chirp rate as high as 350 GHz/ns, is demonstrated. An effective real-time sampling rate of 320 GSa/s is achieved. Time stretching enhances the analog bandwidth and the effective sampling rate of the ADC and enables measurement of the instantaneous behavior of highly nonstationary ultrawideband signals.
引用
收藏
页码：598 / 602
页数：5
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