Photonic generation of bipolar direct-sequence UWB signals based on optical spectral shaping and incoherent frequency-to-time conversion
Abstract
A novel technology to obtain binary phase-coded ultrawideband (UWB) signals for direct-sequence spread-spectrum communication systems is investigated by using a cost-effective incoherent source. The bipolar encoding is performed based on an all-fiber spectrum shaper composed of two FBG arrays to tailor the optical spectrum, and a section of single-mode fiber to achieve incoherent frequency-to-time conversion. We demonstrate a 1.325-Gb/s UWB encoding system by the use of binary spreading codes of 4-chip length via computer simulations. The proposed bipolar UWB encoding technology can be applied to high-speed UWB-over-fiber communication systems.
- Publication:
-
Optics Communications
- Pub Date:
- June 2016
- DOI:
- 10.1016/j.optcom.2016.02.032
- Bibcode:
- 2016OptCo.369..120M
- Keywords:
-
- Microwave photonics;
- Ultrawideband (UWB);
- Direct-sequence (DS);
- Phase coding;
- Frequency-to-time conversion;
- Optical spectral shaping