Design Of Pi/4-Shift DQPSK Transmitter For Wireless Personal Communication

Felix Ho, Feng Nam (2006) Design Of Pi/4-Shift DQPSK Transmitter For Wireless Personal Communication. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project deals with the design of transmitter for wireless personal communication. The type of modulation for the transmitted signal is in the form of Quadrature Phase Shift Keying (QPSK). which has been differentially shifted by 45 °. leading it to be called n/4 -shift Differential Quadrature Phase Shift (DQPSK). n/4 - shift Differential Quadrature Phase Shift (DQPSK) is a four level modulation which a form of Phase Shift Keying (PSK) digital modulation scheme. This report will consist of 3 major parts. Firstly, the comparison and analysis between n/4 -shift DQPSK modulation scheme and its counter part QPSK modulation scheme. The comparison wi ll be in a form of simulation using Matlab software to simulate the ' performance on both transmitted signal schemes along the communication channel. Secondly, software implementation is developed using PIC16F84A to produce an algorithm which performs the Differential Phase Encoding. Lastly. this report will reveal the hardware development of the n/4-shift Differential Quadrature Phase Shjft (DQPSK) transmitter.

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