Experimental Demonstration of DFT-Precoded Guard-Band OSSB-OFDM Signal Reception With ADC Undersampling Technique

Abstract

Guard-band optical single-side-band orthogonal frequency-division multiplexing (GB-OSSB-OFDM) is a good solution to achieve long-haul transmission as well as high receiver sensitivity. A lowcomplexity receiver with ADC undersampling technique is experimentally demonstrated in a GB-OSSB-OFDM transmission system. The principle of the proposed ADC undersampling technique and the constraint conditions on the use of such a technique are presented and discussed in detail. Besides, the discrete Fourier transform (DFT) precoding technique is also applied to reduce the peak-to-average power ratio (PAPR) of the baseband GB-OFDM signal as well as improve bit error rate (BER) performance. By using the DFT precoding technique, it exhibits that the PAPR of the GB-OFDM signal can be reduced by about 6 dB at the complementary cumulative distribution function (CCDF) of 1×10 −3. After 100 km standard singlemode fiber (SSMF) transmission, the results show that the ADC undersampled low-complexity receiver has similar BER performance with the conventional oversampled GB-OFDM receiver. At the BER of 3.8×10 −3 , the receiver sensitivity in terms of received optical power can be improved by about 2 dB with the DFT precoding technique. INDEX TERMS Guard-band orthogonal frequency-division multiplexing (GB-OFDM), undersampling technique, optical single-sideband (OSSB), discrete Fourier transform (DFT) precoding.

Developing a two‐stage stochastic programming model in tolerance optimization using a guard band approach

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