Title :
Theoretical analysis of phase diversity optical homodyne receiver with FSK demodulation
Author :
Tsao, Hen-Wai ; Kuo, Ching-Chih ; Yang, Shien-Chi ; Wu, Jingshown ; Lee, Yang-Han
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/1992 12:00:00 AM
Abstract :
A detailed analysis of optical coherent phase diversity single-filtered and dual-filtered frequency-shift keying (FSK) receivers corrupted by shot and phase noise is presented. With delay and cross-product detection, the effect of various parameters, including bandwidths of filters, delay time, frequency deviation and noises, are investigated. The tolerance of phase noise is quite large, when small time delay in the demodulator and appropriately large frequency deviation is selected. It is also shown that there exists an optimal bandwidth for the first filter in the dual-filtered FSK receiver. For a total linewidth equal to half of the bit rate, the power penalty incurred (at BER=10-9) is 1.92 dB when the modulation index is 4, provided that an optimal filter bandwidth and a frequency deviation-delay product of 0.25 are used
Keywords :
filtering and prediction theory; frequency shift keying; optical communication; random noise; receivers; BER; FSK demodulation; bit rate; coherent optical receiver; cross-product detection; delay time; delay-product detection; dual-filtered FSK; filter bandwidth; frequency deviation; modulation index; optimal bandwidth; phase diversity optical homodyne receiver; phase noise; power penalty; shot noise; single-filtered FSK; total linewidth; Bandwidth; Bit rate; Delay effects; Demodulation; Diversity methods; Frequency shift keying; Optical filters; Optical noise; Optical receivers; Phase noise;
Journal_Title :
Communications, IEEE Transactions on
