Abstract:
Performance of free-space optical (FSO) links employed quadrature phase shift keying (QPSK) modulation with phase compensation error over Gamma-Gamma turbulent channel is...Show MoreMetadata
Abstract:
Performance of free-space optical (FSO) links employed quadrature phase shift keying (QPSK) modulation with phase compensation error over Gamma-Gamma turbulent channel is investigated in this paper. By considering the key factors of weather condition, additional noise and phase noise, the closed-form expressions of symbol error rate (SER) are derived by employing the hyper-geometric functions substitution method. Numerical results show that for FSO system, SER must be the trade off between transmission distance and weather condition, but it suffers more from the weather condition. The effects of imperfect phase compensation on system performance are also studied. Phase noise, which is described by phase compensation error variance parameter σΔφ2, will lead to great degradation to system SER. Increased system signal to noise rate (SNR) helps to increase the system tolerance to σΔφ2 and the maximum tolerable σΔφ2 is around 10° for all weather conditions.
Published in: 2013 22nd Wireless and Optical Communication Conference
Date of Conference: 16-18 May 2013
Date Added to IEEE Xplore: 02 December 2013
ISBN Information: