Design and Verification of Area Efficient Of PSK Modulation for Long Distance Communication
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 = 10−6 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 = 10−6 at SNR = 13.7 dB, while the BER of a comparable system employing OOK can never be less than 10−4. Convolution codes are discussed for communication through atmospheric turbulence channels.
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