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Awqpsk : An Optimum Modulation Technique For Spread Spectrum Communication, Madjid A. Belkerdid
Awqpsk : An Optimum Modulation Technique For Spread Spectrum Communication, Madjid A. Belkerdid
Retrospective Theses and Dissertations
Quadrature phase shift keying (QPSK) and minimum shift keying (MSK) are the two most used M-ary modulation techniques in Direct-Sequence (DS) Spread Spectrum Communication systems. This thesis introduces a new modulation technique that can compete well with QPSK and MSK in many applications. This new modulation technique, made up of a superposition of one QPSK signal and two amplitude weighted QPSK signals, is called Amplitude Weighted Quadrature Phase Shift Keying (AWQPSK). It is found to have the same probability of error as QPSK and MSK techniques. It has a higher bandwidth efficiency in bits/sec/Hz than QPSK and MSK. It has …