Performance of Punctured Convolutional Codes in A-CDMA Systems with Accurately Modelled Multiple Access Interference Under Perfect Phase Tracking Conditions
In this paper, a simplified expression for Improved Gaussian Approximation is considered to model multiple access interference in an A-CDMA system. Punctured convolutional codes, which are one of the subclasses of convolutional codes, are employed to provide error protection to the information transmitted over the wireless channel. A detailed theoretical analysis is made initially and then compared with the simulated results for various code rates. The simulated performance of the codes is then compared for different power levels and different number of interferers of the desired user. A perfect phase reference is assumed to be available for the information signal of the desired user throughout this paper.
KeywordsPunctured convolutional codes Maximum likelihood decoding Asynchronous Code Division Multiple Access system Multi User Interference Perfect phase tracking Improved Gaussian Approximation
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