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Cellular communication systems are the most widely used wireless communication systems. It is the people primary need today to achieve the higher data rates in limited spectrum bandwidth to improve the performance of signals. The authors know digital communication system outperforms analog ones in terms of noise performance and flexibility. Hence, there has been great deal of search for a digital communication system that is bandwidth efficient and has low bit error rate at a relatively low signal to noise ratio. Various digital modulation schemes are incorporated but they are not feasible or cannot fulfill actual requirement varying in different kind of environment.
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