Non-binary ldpc (nb-ldpc) codes has inherent parallelism and excellent error correcting performance. By comparing with other traditional algorithm, FFT-SPA based non-binary ldpc code gives reduced computation complexi...
详细信息
ISBN:
(纸本)9781467348669;9781467348652
Non-binary ldpc (nb-ldpc) codes has inherent parallelism and excellent error correcting performance. By comparing with other traditional algorithm, FFT-SPA based non-binary ldpc code gives reduced computation complexity with better decoding performance. In this paper, FFT-SPA based nb-ldpc decoding performance is analyzed for the specification of IEEE 802.11n standard. Parity check matrix (PCM) defines the strength of the ldpc codes. By retaining the properties of the PCM structures, in this paper we propose two modified parity check matrices to reduce the computation strength. For various order of Galois Field with different PCM structures, non-binary ldpc codes performances are analyzed.
In this paper, we propose a low-complexity decoding message truncation technique for nonbinary ldpcdecoders by exploiting the extended min-sum algorithm. The proposed technique dynamically adjusts the decoding messag...
详细信息
ISBN:
(纸本)9781467396042
In this paper, we propose a low-complexity decoding message truncation technique for nonbinary ldpcdecoders by exploiting the extended min-sum algorithm. The proposed technique dynamically adjusts the decoding message length according to channel conditions, thereby reducing the decoding complexity while conforming to the desired level of decoding performance. Utilizing the proposed technique, the decoding operations as well as the power consumption of the non-binary ldpcdecoder can be greatly reduced. Simulation results demonstrate that the proposed technique can achieve a better power-performance tradeoff over conventional techniques.
In this paper, an efficient iterative receiver for digital communication systems is investigated. It combines a Non-Binary Low Density Parity-Check (nb-ldpc) decoder with a high-order constellation demapper and a Mult...
详细信息
ISBN:
(纸本)9781479930838
In this paper, an efficient iterative receiver for digital communication systems is investigated. It combines a Non-Binary Low Density Parity-Check (nb-ldpc) decoder with a high-order constellation demapper and a Multiple-Input Multiple-Output (MIMO) detector. A suboptimal MIMO detector based on the Belief Propagation (BP) algorithm is investigated as an alternative to a Maximum Likelihood (ML) detector. Extrinsic information is exchanged between the detector and the decoder thanks to an iterative process. EXtrinsic Information Transfer (EXIT) charts enable to analyze the convergence behaviour of the proposed MIMO-BP detector. A suitable schedule for the different types of iterations is finally proposed to reduce the receiver latency and improve its error correction performance.
Non-binary ldpc (nb-ldpc) codes has inherent parallelism and excellent error correcting performance. By comparing with other traditional algorithm, FFT-SPA based non-binary ldpc code gives reduced computation complexi...
详细信息
ISBN:
(纸本)9781467348652
Non-binary ldpc (nb-ldpc) codes has inherent parallelism and excellent error correcting performance. By comparing with other traditional algorithm, FFT-SPA based non-binary ldpc code gives reduced computation complexity with better decoding performance. In this paper, FFT-SPA based nb-ldpc decoding performance is analyzed for the specification of IEEE 802.11n standard. Parity check matrix (PCM) defines the strength of the ldpc codes. By retaining the properties of the PCM structures, in this paper we propose two modified parity check matrices to reduce the computation strength. For various order of Galois Field with different PCM structures, non-binary ldpc codes performances are analyzed.
暂无评论