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High Order Modulation and Turbo Coding for GSM/EDGE
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This thesis evaluates enhancements for the existing global system for§mobile communications (GSM) data service enhanced data rates for GSM§evolution (EDGE). The development goal for further evolution of EDGE is to§provide enhanced maximum data rates. This can only be achieved by applying§higher order modulation schemes. The therefore evaluated modulation§schemes 16 symbol quadrature amplitude modulation (16QAM) and 32QAM will§be compared to 8 symbol phase shift keying (8PSK), which is already§employed for EDGE. All decisive parts of the GSM/EDGE transmission chain§were taken into account with the accomplished simulations and§different realizations for the components have been compared.§Decision--feedback equalization algorithms were extensively investigated§by performance with respect to the given scenario and as well by means of§complexity.§The simulation model is further extended by channel coding, where§convolutional as well as turbo coding is regarded and compared. A possible§iterative concatenation of equalizer and decoder to turbo equalization is§also examined.
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