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Browsing by Author "Arli, A. Cagri"

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    Article
    Noise-Aided Belief Propagation List Decoding of Polar Codes
    (Ieee-inst Electrical Electronics Engineers inc, 2019) Arli, A. Cagri; Gazi, Orhan; Gazi, Orhan; 102896; 206005
    Noise can help weak information bearing signal to be detected in nonlinear systems by the use of stochastic perturbation. In this letter, we propose a novel belief propagation list (BPL) decoder that relies on artificial noise. The proposed decoder is constructed by using parallel independent BP decoders. Noise with different powers are added to different BP decoders that runs in parallel, and the output of the decoder that pass the early detection and termination criteria check is considered as the recovered data. Adding small amount of noise enables the decoder to handle un-converged errors. The obtained results show that the performance of noise-aided BPL decoder is much better than the performances of BP, successive cancelation (SC), and successive cancelation list (SCL) decoders, and it is a bit behind of cyclic redundancy check aided SCL in terms of bit-error rate performance.
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    Conference Object
    Successive papr reduction of OFDM systems via rotation of optimally selected information symbols
    (2018) Gazi, Orhan; Gazi, Orhan
    High peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems is one of the vital degrading factors for the performance of communication systems. In this paper, a new PAPR reduction technique called successive reduction of PAPR (SRP) is introduced. It uses a novel approach that high PAPR may be caused by the characteristics of inverse fast Fourier transform operation. Performance and complexity analysis of the SRP method is also investigated.