Non-Binary Low-Density Parity-Check coded Cyclic Code-Shift Keying

Abassi, Oussama; Conde-Canencia, Laura; Mansour, Mohammad M.; Boutillon, Emmanuel

doi:10.1109/wcnc.2013.6555196

Cited by 12 publications

(13 citation statements)

References 10 publications

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“…Meanwhile, the BER of the investigated scheme has the highest convergence speed with the increase in SNR, which is helpful in reaching a low BER order of magnitude. The investigated scheme earns gains of at least 0.3, 0.95 and 1.05 dB in the region of BER = 10 −5 against CC-CPM with (11,06,11), CC-CPM with (13,06,16) and BLDPC-CPM schemes, respectively. In the region of BER = 10 −4 , an approximate 1.5 dB gain is attained by the investigated scheme compared with turbo-CPM.…”

Section: Simulation Resultsmentioning

confidence: 95%

“…The turbo-CPM scheme is discussed in [10], where a constituent encoder with the generator polynomial (10,04,15) in octal representation is employed by turbo. Convolutional coded CPM (CC-CPM) schemes are studied in [23] and [34], where the generator polynomials of CC are (13,06,16) [23] and (11,06,16) [34], respectively. The binary LDPC-coded CPM (BLDPC-CPM) scheme is considered in [35] with the same variable node degree distribution λ (x) = 0.1290x + Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…These characteristics make CPM an ideal choice, with applications in different stringent communication systems employing nonlinear power amplifiers, such as satellite communication [2,3], satellite mesh networks [4,5] and satellite navigation [6,7]. Rimoldi [8] presented a CPM modulator that can be decomposed into a cascade of a time-invariant convolutional encoder conversion from symbol probabilities to bit probabilities and its inversion in the process of transferring extrinsic information [13]. In addition, the convergence threshold of binary LDPC-coded CPM is higher than the Shannon limit.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic iteration stopping algorithm for non-binary LDPC-coded high-order PRCPM in the Rayleigh fading channel

Xue

Sun

Wei

2016

J Wireless Com Network

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This paper mainly studies the association between non-binary low-density parity-check codes and high-order partial response continuous phase modulation, which prevents information loss in the mutual conversion of bit and symbol probabilities. Although the iterative detection and decoding technique applied in this system can obtain good performance/complexity tradeoff, the iterative process still encounters the problems of positive feedback and relatively large decoding delay, similar to other iterative coded modulation systems. The inhibitory effects of different extrinsic information exchange methods on positive feedback under different signal-to-noise ratio (SNR) conditions are investigated in this work to address this issue. Two dynamic iterative stopping algorithms, namely, cross entropy and hard decision aided combined with weighted extrinsic information exchange for cases with medium and high SNRs, are then proposed. Extrinsic information exchange between the demodulator and the decoder is conducted in the two algorithms through weighted processing. Iterative detection is subsequently performed based on two stopping criteria of dynamic iterative decoding. Theoretic analysis and simulation results for the Rayleigh fading channel show that the combination of weighted extrinsic information exchange and the two dynamic iterative stopping algorithms effectively resists positive feedback and improves the convergence of iterative detection and bit error rate performance. Such a combination also reduces the average iteration number to improve the real-time performance of iterative detection and decoding.

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Section: Simulation Resultsmentioning

confidence: 95%

Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic iteration stopping algorithm for non-binary LDPC-coded high-order PRCPM in the Rayleigh fading channel

Xue

Sun

Wei

2016

J Wireless Com Network

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“…The simulation is based on an AWGN channel with BPSK modulation, which is a widely used channel modulation [12]. We calculated the raw bit error rate (BER) rather than directly used the SNR to represent the actual information of channel.…”

Section: Simulation Resultsmentioning

confidence: 99%

An algorithmic error-resilient scheme for robust LDPC decoding

Lee

Chen

2015

VLSI Design, Automation and Test(VLSI-Dat)

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To fit into multiple communication standards, flexible Low-Density Parity-Check (LDPC) decoding is desirable to be implemented in a chip multiprocessor (CMP) system. However, reliability issues, such as soft errors and timing errors, are severer in future advanced CMP systems when CMOS technology scale. Therefore, enhancing error resilience for a CMP system becomes an important design issue. In this paper, we propose a design methodology to achieve a robust LDPC decoding based on algorithmic error-resilient method. We firstly analyze the performance degradation caused by the soft errors which occur in the computing units (check node units and bit node units), and then explore the inherent error-tolerant characteristic of LDPC decoding algorithm. In our proposed method, we exploit some characteristic distribution or behavior in the operations of the LDPC decoding algorithm to validate the computing results. The experimental results show that the proposed algorithmic error resilience can approach the errorfree decoder while facing high injected soft-error rate of 10 -3 in computing units, but with only 6.07% computational overhead. To the best of our knowledge, this is the first discussion about the LDPC decoding algorithm in terms of soft errors in computing units.

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“…Furthermore, this task is performed in the frequency domain using Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) blocks, which reduces the receiver complexity [4]. The association of CCSK and non-binary codes is straightforward and does not add hardware complexity to the transmitter [5].…”

Section: Introductionmentioning

confidence: 99%

Non-binary coded CCSK and Frequency-Domain Equalization with simplified LLR generation

Abassi¹,

Conde-Canencia²,

Mansour

et al. 2013

2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)

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In this paper, we investigate the performance of Single-Carrier (SC) transmission with Non-Binary Low-Density Parity-Check (NB-LDPC) coded Cyclic Code-Shift Keying (CCSK) signaling in a multipath environment and we show that the combination of CCSK signaling and non-binary codes results in two key advantages, namely, improved Log-Likelihood Ratio (LLR) generation via correlations and reduced implementation complexity. We demonstrate that Maximum Likelihood (ML) demodulation can be expressed by two circular convolution operations and thus it can be processed in the frequency domain. Then, we propose a joint Frequency-Domain Equalization (FDE) and LLR generation scheme that aims at reducing the complexity of the receiver. Finally, we demonstrate through Monte-Carlo simulations and histogram analysis that this proposed CCSK signaling scheme gives more robustness to SC-FDE systems than commonly employed Hadamard signaling schemes (a gap of ≈ 1.5dB in favor of CCSK signaling is observed at BER = 10 −5 , assuming perfect Channel State Information).

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Non-Binary Low-Density Parity-Check coded Cyclic Code-Shift Keying

Cited by 12 publications

References 10 publications

Dynamic iteration stopping algorithm for non-binary LDPC-coded high-order PRCPM in the Rayleigh fading channel

Dynamic iteration stopping algorithm for non-binary LDPC-coded high-order PRCPM in the Rayleigh fading channel

An algorithmic error-resilient scheme for robust LDPC decoding

Non-binary coded CCSK and Frequency-Domain Equalization with simplified LLR generation

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