Title :
A New Channel Reliability Value for Iterative MAP Turbo Decoder
Author :
Lee, Keunhyung ; Lee, Huisoo ; Lee, Yongwook ; Lee, Jihyun ; Oh, Wangrok
Author_Institution :
Div. of Electr. & Inf. Eng., Chungnam Nat. Univ., Daejeon
Abstract :
The performance of turbo code is optimized when a slightly under estimated channel signal-to-noise ratio (SNR) is used within an iterative maximum a posteriori probability (MAP) turbo decoder. We investigate the behavior of iterative MAP turbo decoder under the channel SNR estimation offset and propose a new scheme for setting the channel reliability value for iterative MAP turbo decoders which is not a function of the channel SNR. Simulation results show that the new scheme provides better error performance compared to the traditional method in addition to not requiring an SNR estimator.
Keywords :
channel estimation; maximum likelihood decoding; telecommunication network reliability; turbo codes; channel estimation; channel reliability value; iterative MAP turbo decoder; maximum a posteriori probability; signal-to-noise ratio; turbo code; Bit error rate; Computer networks; Information analysis; Iterative decoding; Mobile communication; Mobile computing; Performance analysis; Reliability engineering; Telecommunication network reliability; Turbo codes; Channel reliability value; iterative MAP decoder; turbo codes;
Conference_Titel :
Networking and Communications, 2008. WIMOB '08. IEEE International Conference on Wireless and Mobile Computing,
Conference_Location :
Avignon
Print_ISBN :
978-0-7695-3393-3
Electronic_ISBN :
978-0-7695-3393-3
DOI :
10.1109/WiMob.2008.97
