Title :
Digital coherent detection with bandpass sampling in multiband phase-modulated radio-over-fiber links
Author :
Minghua Cao ; Jianqiang Li ; Feifei Yin ; Yitang Dai ; Kun Xu
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Univ. of Posts & Telecommun., Beijing, China
Abstract :
The performance of using bandpass sampling technique in optical phase-modulated and coherent detection (PM-CD) radio-over-fiber (RoF) links is analyzed. Additionally, a method to select aliasing-free bandpass sampling frequency is derived. This method is suitable for subcarrier multiplexing (SCM) scenario with the presence of independent free-running optical local oscillator (LO) caused frequency offset. Analytical assessment and simulations are used to determine the ultimate performance with respect to ADC bits resolution and laser linewidth. The simulation result shows that 8 bit resolution and narrow laser linewidth (less than 100kHz) are expected to achieve high performance link for undersampling applications in the PM-CD RoF links.
Keywords :
optical modulation; optical signal detection; phase modulation; radio-over-fibre; subcarrier multiplexing; ADC bits resolution; PM-CD; RoF links; SCM; bandpass sampling frequency; bandpass sampling technique; digital coherent detection; frequency offset; narrow laser linewidth; optical local oscillator; optical phase-modulated and coherent detection; radio-over-fiber links; subcarrier multiplexing; Lasers; Optical fiber communication; Optical fibers; Optical receivers; RF signals; Signal resolution; Bandpass Sampling; Coherent Communication; Multiband Signals; Radio-over-Fiber;
Conference_Titel :
Optical Communications and Networks (ICOCN), 2014 13th International Conference on
Conference_Location :
Suzhou
DOI :
10.1109/ICOCN.2014.6987142
