共查询到20条相似文献,搜索用时 0 毫秒
1.
In this work novel results concerning Network-on-Chip-based turbo decoder architectures are presented. Stemming from previous publications, this work concentrates first on improving the throughput by exploiting adaptive-bandwidth-reduction techniques. This technique shows in the best case an improvement of more than 60 Mb/s. Moreover, it is known that double-binary turbo decoders require higher area than binary ones. This characteristic has the negative effect of increasing the data width of the network nodes. Thus, the second contribution of this work is to reduce the network complexity to support double-binary codes, by exploiting bit-level and pseudo-floating-point representation of the extrinsic information. These two techniques allow for an area reduction of up to more than the 40 % with a performance degradation of about 0.2 dB. 相似文献
2.
Cheng-Hung Lin Chun-Yu Chen En-Jui Chang An-Yeu Wu 《Journal of Signal Processing Systems》2013,73(2):109-122
For high-mobility 4G applications of LTE-A and WiMAX-2 systems, this paper presents a dual-standard turbo decoder design with the following three techniques. 1) Circular parallel decoding reduces decoding latency and improves throughput rate. 2) Collision-free vectorizable dual-standard parallel interleaver enhances hardware utilization of the interleaving address generator. 3) One-bank extrinsic buffer design with bit-level extrinsic information exchange reduces size of the extrinsic buffer compared with the two-bank extrinsic buffer design. Furthermore, a multi-standard turbo decoder chip is fabricated in a core area of 3.38 mm2 by 90 nm CMOS process. This chip is maximally measured at 152 MHz with 186.1 Mbps for LTE-A standard and 179.3 Mbps for WiMAX-2 standard. 相似文献
3.
4.
分析了交织器在Turbo码中的作用,指出了现有的几种交织器的缺点.设计了两种新型的基于块交织的S随机交织器和基于伪随机交织的S随机交织器.仿真结果表明,与现有的几种交织器相比,这两种交织器在Turbo码译码迭代次数及延时方面性能更好,更适合于分布式视频编码系统. 相似文献
5.
6.
Contention-Free Interleavers for High-Throughput Turbo Decoding 总被引:1,自引:0,他引:1
Nimbalker A. Blankenship T.K. Classon B. Fuja T.E. Costello D.J. 《Communications, IEEE Transactions on》2008,56(8):1258-1267
7.
Wong C.-C. Lai M.-W. Lin C.-C. Chang H.-C. Lee C.-Y. 《Solid-State Circuits, IEEE Journal of》2010,45(2):422-432
8.
9.
Zhang Li Fu Weihong Shi Fan Zhou Chunhua Liu Yongyuan 《Wireless Personal Communications》2022,126(2):975-993
Wireless Personal Communications - A neural network-based decoder, based on a long short-term memory (LSTM) network, is proposed to solve the problem that large decoding delay and performance... 相似文献
10.
Turbo码高速译码器设计 总被引:1,自引:0,他引:1
Turbo码具有优良的纠错性能,被认为是最接近香农限的纠错码之一,并被多个通信行业标准所采用。Turbo码译码算法相比于编码算法要复杂得多,同时其采用迭代译码方式,以上2个原因使得Turbo码译码器硬件实现复杂,而且译码速度非常有限。从Turbo码高速译码器硬件实现出发,介绍Turbo码迭代译码的硬件快速实现算法以及流水线译码方式,并介绍利用Altera的Flex10k10E芯片实现该高速译码器硬件架构。测试和仿真结果表明,该高速译码器具有较高的译码速度和良好的译码性能。 相似文献
11.
12.
Inter-window shuffle (IWS) interleavers are a class of collision-free (CF) interleavers that have been applied to parallel turbo decoding. In this paper, we present modified IWS (M-IWS) interleavers that can further increase turbo decoding throughput only at the expense of slight performance degradation. By deriving the number of M-IWS interleavers, we demonstrate that the number is much smaller than that of IWS interleavers, whereas they both have a very simple algebraic representation. Further, it is shown by analysis that under given conditions, storage requirements of M-IWS interleavers can be reduced to only 368 storage bits for variable interleaving lengths. In order to realize parallel outputs of the on-line interleaving addresses, a low-complexity architecture design of M-IWS interleavers for parallel turbo decoding is proposed, which also supports variable interleaving lengths. Therefore, the M-IWS interleavers are very suitable for the turbo decoder in next generation communication systems with the high data rate and low latency requirements. 相似文献
13.
14.
提出了基于高次多项式无冲突交织器的Turbo码并行解码的优化实现方法,解码器采用MAX-Log-MAP算法,完成了从Matlab算法设计验证到RTL设计、FPGA验证,并在LTE无线通信链路中验证.设计的Turbo并行高速解码器半次迭代的效率为6.9 bit/cycle,在最高迭代为5.5次、时钟频率为309MHz下,达到207Mb/s的吞吐率,满足高速无线通信系统的要求,交织和解交织采用存储器映射方法.该设计节约了计算电路和存储量. 相似文献
15.
基于FPGA的Turbo译码交织器设计 总被引:1,自引:0,他引:1
介绍了一种Turbo译码交织器的现场可编程门阵列(Field Programmable Gate Array,FPGA)硬件实现方案,将交织算法的软件编程和FPGA内部的硬件存储块相结合,有效地降低了译码器的硬件实现复杂度,减小了译码延时,并且给出了具体的译码器内交织器FPGA实现原理框图。 相似文献
16.
In this paper we present a low complexity algorithm based on the bubble search sorting method that can be used to generate Turbo code interleavers that fulfill several criteria like spreading (s-randomness), code matched criteria and even the odd–even property for Turbo Trellis Coded Modulation. Simulation results show that for \(s < \sqrt{N/2}\) the algorithm is extremely efficient for short to medium interleaver lengths. 相似文献
17.
Benkeser C. Burg A. Cupaiuolo T. Qiuting Huang 《Solid-State Circuits, IEEE Journal of》2009,44(1):98-106
The turbo decoder is the most challenging component in a digital HSDPA receiver in terms of computation requirement and power consumption, where large block size and recursive algorithm prevent pipelining or parallelism to be effectively deployed. This paper addresses the complexity and power consumption issues at algorithmic, arithmetic and gate levels of ASIC design, in order to bring power consumption and die area of turbo decoders to a level commensurate with wireless application. Realized in 0.13 mum CMOS technology, the turbo decoder ASIC measures 1.2 mm2 excluding pads, and can achieve 10.8 Mb/s throughput while consuming only 32 mW. 相似文献
18.
19.
本文介绍了码率可配置 Turbo 译码器的 FPGA 设计与实现。可配置 Turbo 译码器可灵活支持 1/3、1/6、1/10 三种码率,减少了器件使用规模和资源,并支持固定迭代次数译码和动态迭代译码。码率可配置 Turbo 译码器最终在 Xilinx 公司的 XC7K325T-2FFG900I 芯片上实现。 相似文献
20.
We propose a novel iterative decoder for block turbo codes (BTCs). The proposed decoder combines soft-input/softoutput (SISO) and hard-input/hard-output (HIHO) constituent decoders in order to obtain better error performance and reduce the computational complexity compared to classical BTC decoders. We show that the new decoder, called ?hybrid decoder?, offers a better complexity/performance tradeoff than a classical BTC decoder. 相似文献