Improved Turbo Decoding Using Soft Combining Principle

One great challenge in wireless communication systems is to ensure reliable communications. Turbo codes are known by their interesting capabilities to deal with transmission errors. In this paper, we present a novel turbo decoding scheme based on soft combining principle. Our method improves decodin...

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Bibliographic Details
Published in:Wireless personal communications 2014-09, Vol.78 (2), p.1115-1127
Main Authors: El Makhtari, Salima, Moussaoui, Mohamed, Samadi, Hassan
Format: Article
Language:English
Subjects:
Algorithmics. Computability. Computer arithmetics
Applied sciences
Coding, codes
Communications Engineering
Computer Communication Networks
Computer science
control theory
systems
Computer systems and distributed systems. User interface
Engineering
Exact sciences and technology
Information, signal and communications theory
Networks
Radiocommunications
Signal and communications theory
Signal,Image and Speech Processing
Software
Telecommunications
Telecommunications and information theory
Theoretical computing
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Summary:One great challenge in wireless communication systems is to ensure reliable communications. Turbo codes are known by their interesting capabilities to deal with transmission errors. In this paper, we present a novel turbo decoding scheme based on soft combining principle. Our method improves decoding performance using soft combining technique inside the turbo decoder. Working on Max-Log-Maximum a Posteriori (Max-Log-MAP) turbo decoding algorithm and using an Additive White Gaussian Noise (AWGN) channel model and 16 Quadrature Amplitude Modulation (16QAM), simulation results show that the suggested solution is efficient and outperforms the conventional Max-Log-MAP algorithm in terms of Bit Error Rate (BER). The performance analysis is carried out in terms of BER by varying parameters such as the Energy per bit to Noise power spectral density ratio ( E b / N o ), and decoding iterations number. We call our proposed solution Soft Combined Turbo Codes.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-014-1805-0