Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)最新文献_第9页

Design and Analysis of LDPC Decoders for Software Defined Radio 软件无线电LDPC解码器的设计与分析

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387546

Sangwon Seo, T. Mudge, Yuming Zhu, C. Chakrabarti

引用次数: 30

Energy Efficient Turbo Decoder with Reduced State Metric Quantization 节能涡轮解码器与减少状态度量量化

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387551

Haisheng Liu, J. Diguet, C. Jégo, M. Jézéquel, E. Boutillon

{"title":"Energy Efficient Turbo Decoder with Reduced State Metric Quantization","authors":"Haisheng Liu, J. Diguet, C. Jégo, M. Jézéquel, E. Boutillon","doi":"10.1109/SIPS.2007.4387551","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387551","url":null,"abstract":"In the field of mobile communications, the energy issue of a turbo decoder becomes an equivalent constraint as through-put and performance. This paper describes a technique to reduce the internal bitwidth of the state metrics, and hence, to decrease the entire energy dissipation of a turbo decoder. This approach is based on the saturation of the state metrics. Two cases are investigated: saturation outside the ACS recursion loop and saturation inside the ACS recursion loop. The targeted system is the Universal Mobile Telecommunications System (UMTS) with an 8-state turbo decoder using the Max-Log-MAP algorithm. When received symbols and extrinsic informations are respectively 4-bit and 6-bit quantized, the internal bitwidth of the state metrics can be reduced from 7 bits downto 4 bits. This reduction is paid by a loss of 0.1 dB at a Bit Error Rate (BER) of 1-6. In addition, when 40 SISO decoders perform in parallel, the proposed optimization yields to a reduction of memory area by 10% and leads to an energy reduction of 24% for a 70 nm technology.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"260 3","pages":"237-242"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/SIPS.2007.4387551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72401106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Efficient Function Evaluations with Lookup Tables for Structured Matrix Operations 结构化矩阵操作的高效函数求值与查找表

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387592

K. Sobti, L. Deng, C. Chakrabarti, N. Pitsianis, Xiaobai Sun, Jungsub Kim, P. Mangalagiri, K. Irick, M. Kandemir, N. Vijaykrishnan

引用次数: 13

Joint Precoding and Equalisation Design Using Oversampled Filter Banks for Dispersive Channels with Correlated Noise 带有相关噪声的色散信道的过采样滤波器组联合预编码和均衡设计

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387550

Chunguang Liu, C. Ta, Stephan Weiss

引用次数: 5

Multilevel Linc System Design for Power Efficiency Enhancement 提高功率效率的多电平直线系统设计

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387512

Kai-Yuan Jheng, Yuan-Jyue Chen, A. Wu

引用次数: 8

Architecture Design of the Double-Mode Binarization for High-Profile H.264/AVC Compression H.264/AVC压缩双模二值化体系结构设计

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387540

G. Pastuszak

引用次数: 0

Achieving Maximum Possible Download Speed on ADSL Systems 在ADSL系统上实现最大可能的下载速度

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387582

O. Ndili, T. Ogunfunmi

引用次数: 7

Adaptive frame recovery based on motion activity 基于运动活动的自适应帧恢复

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387633

Tian-sheng Tang, Jin Wang, Yunqiang Liu, Yizhi Gao, Songyu Yu

{"title":"Adaptive frame recovery based on motion activity","authors":"Tian-sheng Tang, Jin Wang, Yunqiang Liu, Yizhi Gao, Songyu Yu","doi":"10.1109/SIPS.2007.4387633","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387633","url":null,"abstract":"Whole-frame loss of the compressed video is very common in transmission over error-prone networks since each coded picture is usually packetized into one single packet in order to reduce the bitstream overhead for transmission. In this paper we present an adaptive frame recovery algorithm which innovatively introduces the three-dimensional recursive search (3DRS) motion estimation method into fram reovr (FR), and dynamically selects between 3DRS based recovery and motion vector copy (MVC) based recovery according to the statistics of motion activity of previous frames. If the motion activity of the frame is large, we adopt 3DRS-based frame recovery. Otherwise MVC-based FR is used. For the former method, we first perform the modfief 3DRS to re-estimate the motion vectors (MVs) of the previous frame considering that the available motion information of previous frames is not close to the true motion trajectory. Then the MVs are extrapolated and refined as the MVs of the lost frame. The missing frame is recovered using motion compensation. For MVC-based FR, motion information of previous frames, derived from the decoder is reused. Experimental results show that our proposed solutions can achieve significant improvements in both PSNR and visual quality.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"16 1","pages":"692-697"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82884024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Auto Focusing Under Microscopic Views 在显微镜下自动对焦

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387604

K. Lin

引用次数: 4

Embedded Reconfigurable Solution for OFDM Detection Over Fast Fading Radio Channels 快速衰落无线电信道上OFDM检测的嵌入式可重构解决方案

Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014) Pub Date : 2007-11-21 DOI: 10.1109/SIPS.2007.4387509

M. Sima, M. McGuire

{"title":"Embedded Reconfigurable Solution for OFDM Detection Over Fast Fading Radio Channels","authors":"M. Sima, M. McGuire","doi":"10.1109/SIPS.2007.4387509","DOIUrl":"https://doi.org/10.1109/SIPS.2007.4387509","url":null,"abstract":"OFDM demodulation under fast fading radio channels is very computationally demanding, making the implementation of Software Defined Radio (SDR) solutions problematic. A sub-optimal demodulation algorithm based on QR decomposition of blocks of the channel transfer matrix offers near optimal performance at lower computational cost, but hardware support is still needed. We first propose a COordinate Rotation DIgital Computer (CORDIC) rotator in reconfigurable hardware to expose and then exploit at software level the intra-block paralellism of the QR decomposition. In particular, we show that although the rotator is deeply pipelined, the scale factor inherent to CORDIC algorithm can still be distributedly compensated throughout the pipeline at no additional cycle time penalty. Then, for a Nios II processor augmented with a Reconfigurable Functional Unit (RFU) that incorporates the proposed CORDIC rotator, we also propose a computing scenario that keeps all the data to be processed inside the RFU, to minimize overhead of the data trafic between the Register File and the CORDIC rotator. Overall, we show that OFDM demodulation under fast-fading can be performed in fixed-point arithmetic and in real-time on a Nios II reconfigurable embedded system, proving that an SDR solution for OFDM demodulation under fast fading is possible.","PeriodicalId":93225,"journal":{"name":"Proceedings. IEEE Workshop on Signal Processing Systems (2007-2014)","volume":"28 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83530663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5