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| A Method to Improve the Iterative Detection Convergence of SCCPM |
| Han Zhi-xue①; Bi Wen-bin②; Zhang Xing-zhou① |
①College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China;
②China Ship Research and Development Academy, Beijing 100085, China |
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Abstract Convergence of Serially Concatenated Continuous Phase Modulation (SCCPM) is studied. Based on the theory of dynamic system, phenomena of positive feedback during iterative detection are analyzed, and improved methods are proposed from the views of decrease and detection of positive feedback. An iterative method based on weighed extrinsic information exchange is proposed, which can improve the convergence of SCCPM effectively. A dynamic iterative method based on the number of change of hard decision is designed; which can detect the positive feedback as well as reduce the average number of iteration. Simulation results show the proposed methods can decrease positive feedback and improve the performance of SCCPM effectively.
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Received: 05 December 2005
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2007, Vol. 29 
