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PERFORMANCE OF WIRELESS OPTICAL COMMUNICATION SYSTEMS USING DPSK MODULATION

Platform : vlsi

IEEE Projects Years : 2009

This paper appears in: Advanced Communication Technology, 2009. ICACT 2009. 11th International Conference on Issue Date: 15-18 Feb. 2009 AIM: IMPLEMENTATION OF WIRELESS OPTICAL COMMUNICATION SYSTEMS USING DPSK MODULATION VIA VHDL ABSTRACT A coherent differential phase-shift keying (DPSK) transmission system is presented to improve the receiver sensitivity for wireless optical communications. The error probability expression over atmospheric channels is derived under the assumption of log-normal distributed scintillation, and then the performance of DPSK system is compared with that of a most commonly used on-off keying (OOK) system under the same channel conditions. Theory analysis and numerical results illustrate that with the same bandwidth, DPSK system has a higher sensitivity than OOK, and to a certain extent DPSK format can reduce the impairment from turbulence-induced scintillation for its threshold being signal intensity insensitive, and hence, DPSK format is very suitable for atmosphere channels and has a broad prospect in wireless optical communications. LEARNING OBJECTIVE: To understand about differential phase-shift keying (DPSK) transmission system via VHDL INPUT: Data / information about differential phase-shift keying (DPSK) transmission system via VHDL OUTPUT : Simulated output of differential phase-shift keying (DPSK) transmission system via VHDL APPLICATIONS: Very high speed integrated circuit hardware description language design, VLSI Design SOSFTWARE TOOL USED: XLINX81I

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