... method to design allotted LDPCcodes for DMT channels. The method is general and can beused for every nonuniform channel. This method allows for design of optimized LDPC codes which outperform conven-tional ... systems with nonuniform channels.This paper is organized as follows. In Section 2,webrieflyreview the required background of nonuniform channelsand LDPC coding for uniform and nonunifor m channels.Section ... parameters. We propose a coding sys-tem for discrete multitone channels that allows for using a single code over a nonuniform channel. The number of code parameters for the proposed system is much greater...
... power [11]. The existingCBT methods are not suitable for low- power VLSI realiza-tion because of the high computation complexity and highhardware complexity. Therefore, there is a need to design ... with the Center for Signal Processing, NTU as a Research Engi-neer. His research interests include digital IC design, VLSI architec-tures for digital signal processing, low- power design, and embed-ded ... and R. W. Brodersen, Low- power CMOS digital design, ” IEEE Journal of Solid-State Cir-cuits, vol. 27, no. 4, pp. 473–484, 1992.[18] B. M. Bass, “A low- power, high-performance, 1024-points...
... large variable gain ranges under low supply voltage. II.2 Comparison of the commonly used VGA structures The design requirements impose challenges on lowpower consumption, very large bandwidth, ... suitable forlowpower applications. (3) Summary of analog-multiplier-based VGA In summary, the multiplier-based VGA has good linearity and large gain tuning range, but it is not power efficient ... generated by the subtraction between gmp1 and gmp2. And hence, it is not suitable for low- power VGA design. II.1.3 Differential pair with source degeneration Another commonly used VGA...
... to proposals on other levels in the design flow and to future work. Keywords: Low- power design, dynamic power reduction, leakage power reduction, ultra- low- Vth devices, multi-Vdd, multi-Vth, ... of dynamic power consumption is a concern for almost all IC products today. For battery-powered products, reduced power consumption directly results in longer operating time for the product, ... search for optimization of power consumption. For leading-edge products which need to optimize both power consumption and system performance, optimization techniques on architecture and design...
... Open AccessNovel low- PAPR parallel FSOK transceiver design for MC-CDMA system over multipath fadingchannelsJuinn-Horng Deng*and Jeng-Kuang HwangAbstractA low peak-to-average power ratio (PAPR) ... performance and outperform the con-ventional STBC MISO and MIMO systems.The rest of this article is organized as follows. In Sec-tion 2, we pre sent the SISO system block d iagram andformulate ... 2011:144http://jwcn.eurasipjournals.com/content/2011/1/144Page 2 of 14 to signal power. For performance comparisons, BERsimulations are conducted for the proposed QPS K-FSOKMC-CDMA, conventional MC-CDMA [8],...
... ultra -low- power image compressor for capsule endoscope,” BioMedicalEngineering Online, vol. 5, article 14, 2006.[15] X. Xie, G. Li, X. Chen, X. Li, and Z. Wang, “A low- power digitalIC design ... converting into one dimension for B component.Raw imageRG1G2BCompressionimage for G1Compressionimage for G2Noncompressionimage for B Compressionimage for R EntropycodingEntropycodingEntropycoding4-by-4zigzagscan4-by-4zigzagscan8-by-8zigzagscanQuantizationR-table4-by-4quantizationG-table4-by-4quantizationG-table2D8-by-8DCT2D4-by-4DCT2D4-by-4DCT2 ... 1.8 V, the powerconsumption of logic partis 3.88 mW, estimated by using PrimePower. The memoryblocks are generated by Artisan memory compiler andconsume 5.29 mW. The total power consumption...
... exact method makes it infeasible for practical applications. Therefore, it is needed to derivean approximate solution for the success probability givingacceptable performance with minimal computational ... ft+1. (11)Following the above formulation, the history of trans-mission outcomes for each channel can be written as x(t)=(it, bt, st, ft) which we call the informational state ... the trafficpatternof interfering network in each channel. For the reasons that will follow, we assume that theduration of idle intervals, for channel i, is modeled as ageometric random variable...
... averageenergy consumption per node of LPL and DW-LPL for varying sleep intervals, Tp for LPL and Tb for DW-LPL. InFigure 8(a), Tp= 100 ms is best for data generation intervalTd= 10 s. For Td= ... energymodel: (a) energy consumptionfor varying Tpin LPL (n = 10);(b) energy consumptionfor varying Tbin DW-LPL (n = 10, δ =0.01, T∗p); (c) energy consumption comparison for varying RdinLPL ... analysis.Symbol Meaning CC2420Pl Power in listening 56.4 mWPt Power in transmitting 52.2 mWPr Power in receiving 56.4 mWPa Power in awaking 670 uWPs Power in sleeping 3 uWtaTime to...
... the total powerconsumption and the finalthroughput.In this paper, we propose a dataflow oriented design ap-proach for low- power block based video processing and ap-ply it to the design of ... Bor-mans, “Algorithmic and architectural co -design of a motion-estimation engine for low- power video devices,” IEEE Trans-actions on Circuits and Systems for Video Technology, vol. 12,no. 12, pp. ... [9]. The techniques forpower aware system design [10] are grouped according to their impact on the en-ergy delay product in [4]. Our proposed design flow assignsthem to a design step and identifies...
... the joint design has a better performance than thevarious separate design schemes. Furthermore, the joint source precoder, relay for- warding matrix and destination equalizer designfor dual ... closed-form solution is the optimal solution.Chapter 3—Robust Transceiver Designfor AF MIMO-OFDM Relay Sys-tems: In this chapter, joint design of linear relay precoder and destinationequalizer for ... of cooperative protocols: amplify-and-forward (AF), decode-and-forward (DF) and compress-and-forward (CF). For AFstrategy, the relay only amplifies and forwards the received signal from the sourceto...
... Upstream DesignFor Six Sigma 302.9 Summary 313. Introduction to Service Designfor Six Sigma (DFSS) 333.1 Introduction 333.2 Why Use Service Designfor Six Sigma? 343.3 What Is Service DesignFor ... (FMEA)development Designfor serviceabilitySimulation/optimization Design scorecard4. Preliminary designDesign parameters with Design mapping (process and detailed specification functional mappings) Design ... size design to be robust for Hypothesis testingvariations in production, consumption, and disposalstages (continued)c01.qxd 4/22/2005 7:31 AM Page 9 Designfor Six Sigma focuses on design...
... to power amplifier design and includesLoad Pull measurement and design techniques and a more analytic design exampleof a broadband, efficient amplifier operating from 130 to 180 MHz. The design example ... responsibly manufactured from sustainable forestry,in which at least two trees are planted for each one used for paper production. 18 Fundamentals of RF Circuit Design ()()++++++−=sbbebebsbbTsbbebebLminoutRrrrRrCjRrrrRgVV'''''''11ω(1.49)Note ... (1.79)The low frequency value for S21 is therefore:()++=5050.2'''21bbebebmrrrgS (1.72)()77.350100250025002221=++=S(1.80)As before...