Analysis and Design of Serially Concatenated Turbo-coded Systems [microform]

Download or read book Analysis and Design of Serially Concatenated Turbo-coded Systems [microform] written by Weixiong Lin and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we develop two joint channel estimation and serial turbo decoding methods. Both of the methods have low computational complexity and excellent performance. Although they are pilot-symbol assisted, we propose a method of pilot insertion that does not result in bandwidth expansion. Simulation shows that our designs are better in the areas of computational complexity, flexibility, and performance compared to the noncoherent decoding system developed by Marsland and Mathiopoulos in 2000. The bit error rate (BER) of the serial turbo decoding systems cannot be determined directly from the Extrinsic Information Transfer (EXIT) chart. Therefore, we propose a method to map the mutual information trajectory of the iterative decoding from the EXIT chart onto the BER characteristic of the outer convolutional code. In this way, the BER at each iteration can be determined without performing time-consuming iterative simulations, if the BER characteristic of the outer code is available.