The present paper has considered multithreshold decoders for self-orthogonal codes providing a near-optimal efficiency of the error correction under linear computational complexity. New divergence principle used withi...
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ISBN:
(纸本)9781538605851
The present paper has considered multithreshold decoders for self-orthogonal codes providing a near-optimal efficiency of the error correction under linear computational complexity. New divergence principle used within construction and decoding convolutional codes has been discussed. The paper has shown that usage of such principle allows significantly approximating an area of the decoder effective operation to the channel capacity. Application of obtained self-orthogonal codes within construction of concatenated convolutional codes where parity-check codes are used as the outer codes has been indicated, as well as simulation results for the obtained concatenated construction have been represented.
We consider the trade-off between identification and secret-key binding capacities in biometric systems. We propose the use of linear codes to achieve optimal trade-off for general source and noise models. We relate t...
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ISBN:
(纸本)9781457705953
We consider the trade-off between identification and secret-key binding capacities in biometric systems. We propose the use of linear codes to achieve optimal trade-off for general source and noise models. We relate the problem to classical point to point communication problems, and two system designs based on linear codes are discussed. One design is proven to achieve optimal trade-off by using good linear codes and good decoders. The other design can be proven to achieve slightly suboptimal performance with lower decoder complexity, which is proper for many practical situations. Based on these results, we are also able to extend previous achievable rate region results to general source and noise models that have dependency within and across source and noise elements.
A study of reduced complexity concatenated coding schemes, for commercial digital satellite systems with low-cost earth terminals, is reported. The study explored trade-offs between coding gain, overall rate and decod...
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A study of reduced complexity concatenated coding schemes, for commercial digital satellite systems with low-cost earth terminals, is reported. The study explored trade-offs between coding gain, overall rate and decoder complexity, and compared concatenated schemes with single codes. It concentrated on short block and constraint length inner codes, with soft decision decoding, concatenated with a range of Reed-Solomon outer codes. The dimension of the inner code was matched to the outer code symbol size, and appropriate interleaving between the inner and outer codes was used. Very useful coding gains were achieved with relatively high-rate, low-complexity schemes. For example, concatenating the soft decision decoded (9,8) single parity check inner code with the CCSDS recommended standard Reed-Solomon outer code gives a coding gain of 4.8dB at a bit error probability of 10 −5 , with an overall rate of 0-78.
In this paper, a trade-off analysis between concatenated codes consisting of a convolutional (CC) followed by a Reed-Solomon (RS) code versus low-density parity-check (LDPC) codes is presented. The analysis is based o...
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ISBN:
(纸本)9781467325660
In this paper, a trade-off analysis between concatenated codes consisting of a convolutional (CC) followed by a Reed-Solomon (RS) code versus low-density parity-check (LDPC) codes is presented. The analysis is based on a twofold criterion: coding gain for a target bit error rate (BER) of 10-6 and required decoder hardware complexity for a target data throughput of 10 Gbps. Furthermore, we have investigated relevant parameters which directly impact an efficient hardware implementation as well as the error correction performance of the LDPC decoder. These parameters include an attenuation factor in the min-sum layered (MSL) decoding algorithm, the finite word length of soft information and an early-termination (ET) strategy. The error correction performances are evaluated for 16-QAM modulation over an independent Rayleigh fading channel. The complexity of the RS-CC and LDPC decoders is estimated based on synthesis results using an Infineon 40 nm CMOS design kit.
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