A Novel Stopping Criterion for LTE-A High Speed Turbo Decoder

Since turbo code is adopted as a channel coding scheme by the LTE-A system, how to improve the decoding speed of turbo codes to match the high data rate requirement of LTE-A has become an important issue. In this paper, we present a novel stopping criterion which uses the statistics value of a set of multiple minimum soft decision values as a measure to stop the iterating process of turbo decoder. Simulation results show that our proposed criterion saves more iterations with little loss in BER when compared with several well-known existing criteria, which indicates it is suitable for designing high speed turbo decoder required by LTE-A systems.

[1]  Ibrahim Al-Mohandes,et al.  Iteration reduction of turbo decoders using an efficient stopping/cancellation technique , 2002, 2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353).

[2]  An-Yeu Wu,et al.  On the New Stopping Criteria of Iterative Turbo Decoding by Using Decoding Threshold , 2007, IEEE Transactions on Signal Processing.

[3]  Shu Lin,et al.  Two simple stopping criteria for turbo decoding , 1999, IEEE Trans. Commun..

[4]  A. Glavieux,et al.  Near Shannon limit error-correcting coding and decoding: Turbo-codes. 1 , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[5]  Fumiyuki Adachi,et al.  Reducing average number of turbo decoding iterations , 1999 .

[6]  Chia-Chun Tsai,et al.  A new low-power turbo decoder using HDA-DHDD stopping iteration , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[7]  Zhen-chuan Zhang,et al.  Research and Improvement on Stopping Criterion of Turbo Iterative Decoding , 2010, 2010 6th International Conference on Wireless Communications Networking and Mobile Computing (WiCOM).

[8]  Yufei W. Blankenship,et al.  A simple stopping criterion for turbo decoding , 2000, IEEE Communications Letters.

[9]  I. J. Fair,et al.  New error detection techniques and stopping criteria for turbo decoding , 2000, 2000 Canadian Conference on Electrical and Computer Engineering. Conference Proceedings. Navigating to a New Era (Cat. No.00TH8492).

[10]  Fabrizio Pollara,et al.  Stopping Rules for Turbo Decoders , 2000 .

[11]  Jing Chen,et al.  Average-entropy variation in iterative decoding of turbo codes and its application , 2008 .

[12]  Joachim Hagenauer,et al.  Iterative decoding of binary block and convolutional codes , 1996, IEEE Trans. Inf. Theory.