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

fYear

2008

fDate

12-14 Oct. 2008

Firstpage

333

Lastpage

334

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/WiMob.2008.97

Filename

4654258