Design and Verification of Area Efficient Of PSK Modulation for Long Distance Communication

Bhavesh Kumar Mishra

Abstract


The Research Paper studies communications using phase shift keying (PSK) intensity modulation through at-morphemic turbulence channels. A methodology for PSK realization of signal processing algorithms for wireless communications is presented that optimizes architecture for reduced power and area. When power is limited, optimal architecture represents a point on the best power-area tradeoff curve that is obtained by balancing the algorithm throughput with the power-performance tradeoff of the underlying building blocks. Architectural optimization is done in the graphical Matlab/Simulink environment, which is also used for algorithm verification. The bit error rate (BER) is derived for   communication systems employing either on/off key (OOK) or subcarrier PSK intensity modulation. It is shown that at BER = 106 and a scintillation level of σ = 0.1, an   communication system employing subcarrier BPSK is 3 dB bet-ter than a comparable system using fixed-threshold OOK. When σ = 0.2, an   communication system employing subcarrier BPSK achieves a BER = 106 at SNR = 13.7 dB, while the BER of a comparable system employing OOK can never be less than 104. Convolution codes are discussed for communication through atmospheric turbulence channels.


Keywords


coding; laser; scintillation; architecture; adaptive signal processing; matrix decomposition

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