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An Experimental Investigation of Interference Suppression in Direct Optical Switching CDM Radio-on-Fiber System
Takeshi HIGASHINO Katsutoshi TSUKAMOTO Shozo KOMAKI
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/07/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Microwave and Millimeter-wave Photonics Technologies)
Category: Photonic Links for Wireless Communications
microwave photonics, radio on fiber (ROF), CDM, interference suppression, optical polarity reversing correlator,
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This paper describes the experimental approach of the Direct Optical Switching (DOS) CDM Radio-on-Fiber (RoF) system. Improved carrier-to-interference ratio (CIR) performance by using an Optical Polarity Reversing Correlator (OPRC) in comparison to using a single switch decoder is experimentally obtained. In addition, CIR performance deterioration due to degradation of the extinction ratio of the optical switch decoder is clarified from the theoretical and experimental viewpoints. Finally, we confirmed that CIR performance is improved more by using an M-sequence whose weight is even numbered than by using an odd numbered one.