Photonics-Based Broadband RF Spectrum Measurement With Sliced Coherent Detection and Spectrum Stitching Technique
oleh: Guangyu Gao, Lihua Lei
| Format: | Article |
|---|---|
| Diterbitkan: | IEEE 2017-01-01 |
Deskripsi
A novel photonics-based channelization approach is proposed for broadband radio frequency (RF) spectrum measurement with a single optical frequency comb, sliced coherent detection (SCD), and improved fast fourier transform-based digital signal processing. Through SCD, channel estimation and spectrum stitching, a broadband and complex RF spectrum can be detected and reconstructed with vector information in a high fidelity. A two-channel architecture as a proof of concept is characterized numerically with up to 40 GHz operation bandwidth, ≤12.5 GHz analysis bandwidth per channel, 113 dB·Hz<sup>2/3</sup> spurious free dynamic range, and 161 dB·Hz linear dynamic range. The potentials for further system developments in practice are also discussed.