Design Architecture

Download Turbo Decoder Architecture for Beyond-4G Applications by Cheng-Chi Wong, Hsie-Chia Chang PDF

By Cheng-Chi Wong, Hsie-Chia Chang

This ebook describes the newest ideas for rapid decoder implementation, specially for 4G and past 4G purposes. The authors show concepts for the layout of high-throughput decoders for destiny telecommunication structures, permitting designers to minimize expense and shorten processing time. insurance contains a proof of VLSI implementation of the rapid decoder, from uncomplicated sensible devices to complicated parallel structure. The authors talk about either structure suggestions and experimental effects, displaying the diversities in area/throughput/performance with recognize to a number of innovations. This publication additionally illustrates faster decoders for 3GPP-LTE/LTE-A and IEEE 802.16e/m criteria, which offer a low-complexity yet high-flexibility circuit constitution to help those criteria in a number of parallel modes. in addition, a few strategies that may triumph over the challenge upon the speedup of parallel structure by means of amendment to faster codec are provided right here. in comparison to the normal designs, those equipment may end up in at such a lot 33% achieve in throughput with related functionality and related cost.

Show description

Read Online or Download Turbo Decoder Architecture for Beyond-4G Applications PDF

Similar design & architecture books

Mathematics and the Divine: A Historical Study

Arithmetic and the Divine appear to correspond to diametrically adverse developments of the human brain. Does the mathematician no longer search what's accurately outlined, and do the items meant by way of the mystic and the theologian no longer lie past definition? Is arithmetic no longer Man's look for a degree, and is not the Divine that that's immeasurable ?

Agile Portfolio Management

Learn how your organization s complete venture portfolio can enjoy the rules of agility from knowledgeable on agile tactics. Agile software program improvement is now extra renowned than ever, yet agility doesn t have to cease there. This advisor takes a big-picture examine how portfolio managers and undertaking managers could make use of confirmed agile improvement the right way to bring up organizational potency.

Analysis of Neural Networks

The aim of this paintings is a unified and normal remedy of task in neural networks from a mathematical standpoint. attainable purposes of the idea awarded are indica­ ted during the textual content. besides the fact that, they aren't explored in de­ tail for 2 purposes : first, the common personality of n- ral task in approximately all animals calls for a few kind of a common process~ secondly, the mathematical perspicuity could endure if too many experimental information and empirical peculiarities have been interspersed one of the mathematical research.

Heterogeneous System Architecture. A New Compute Platform Infrastructure

Heterogeneous structures structure - a brand new compute platform infrastructure offers a next-generation platform, and linked software program, that permits processors of alternative kinds to paintings successfully and cooperatively in shared reminiscence from a unmarried resource software. HSA additionally defines a digital ISA for parallel exercises or kernels, that is seller and ISA self sufficient therefore permitting unmarried resource courses to execute throughout any HSA compliant heterogeneous processer from these utilized in smartphones to supercomputers.

Additional resources for Turbo Decoder Architecture for Beyond-4G Applications

Sample text

15) Modulo 10;11 11;12 2:7 2:7 270:0 275:2 19:9 19:9 18:1 16:7 74:0 45:2 28:4 35:7 32:2 40:3 92:6 112:3 the cost of these extra registers is also determined by the CMOS technology and memory structure. As either the design objective or available resource varies, it is still possible to use the SISO decoder in Fig. 7 to get the best operating efficiency at relatively lower cost. Chapter 3 Turbo Decoder with Parallel Processing The operating frequency F is the decisive factor in throughput calculation of conventional turbo decoders.

It is still easy to perform these modified equations. With the alternative address generation, the hardware consists primarily of adders and subtractors. The addition of each equation has two operands whose values are both less than N, so the upper bound of their summation is 2N. For those summations greater than N, the modulo operation is carried out easily by subtracting N from them. We can complete all calculations of every recursion step within one cycle. Consequently, the address generator is able to output the interleaving indexes on the fly.

3 Techniques for Efficient Decoding Process 25 The decoding algorithm based on the above three equations is named the Log-MAP algorithm. For the Log-MAP algorithm, a lookup table with high accuracy can lead to the same performance as the MAP algorithm, but it also means the requirement of larger memory. A further simplification can be achieved by completely discarding the lookup table. The correction term will be omitted from the max . 67) This approximation leads to the Max-Log-MAP algorithm that involves only the additions and the max.

Download PDF sample

Rated 4.14 of 5 – based on 25 votes