共查询到20条相似文献,搜索用时 15 毫秒
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Mark Woh Yuan Lin Sangwon Seo Scott Mahlke Trevor Mudge 《Journal of Signal Processing Systems》2011,63(1):83-94
Commercial and research work in the field of software defined radio (SDR) has produced designs which have been able to deliver
the efficiency and computational power needed to process 3G wireless technologies. Though efficient 3G processing has been
achieved by these designs, next generation 4G SDR technology requires 10–1000x more computational performance but limits the
power budget increase to 2–5x. In this paper, we present a breakdown of the major 4G kernels and analyze two methods of increasing
performance and reducing power consumption. Specifically, we consider the effect of SIMD width and reduction in number of
register file accesses on the performance and energy consumption of a SDR architecture, SODA. We show that by increasing SIMD
width we can gain almost 2–8x performance increase while increasing total energy used by 1–2x for different SIMD widths. We
also show that by reducing SIMD register accesses we can reduce the total energy used by 5–20% for the 4G kernels. 相似文献
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Instruction Set Extensions for MPEG-4 Video 总被引:2,自引:0,他引:2
Mladen Berekovic Hans-Joachim Stolberg Mark B. Kulaczewski Peter Pirsch Henning Möller Holger Runge Johannes Kneip Benno Stabernack 《The Journal of VLSI Signal Processing》1999,23(1):27-49
This paper describes instruction set extensions for the acceleration of MPEG-4 algorithms on programmable (RISC-) CPUs. MPEG-4 standardizes audio and video compression schemes for a variety of bit rates and scenarios. As MPEG-4 targets a much broader range of different applications than previously defined hybrid video coding standards like H.263 or MPEG-2, it employs a much higher number of different algorithms and coding modes. Therefore, MPEG-4 implementations will require a more software-oriented approach to be efficient. However, the total computational load for an optimized implementation of an MPEG-4 video codec is expected to exceed the performance levels of today's multimedia signal processors, making further hardware acceleration a necessity. For that purpose, we propose a number of instruction set extensions that add function-specific blocks to the data path of a CPU. These dedicated modules are highly adapted to the most computation-intensive processing schemes of MPEG-4, such as DCT, motion compensation, padding, shape coding, or bitstream parsing. The increased functionality of basic instructions results in a significant speed-up over standard RISC instruction sets, thus making MPEG-4 implementations feasible on programmable processor platforms. Possible target architectures include VLIW multimedia processors, MIMD-style multiprocessors, or coprocessor architectures 相似文献
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本简单介绍了软件无线电技术的产生原因及其优越性,分析了制约软件无线电技术发展的几个因素,同时介绍了软件无线电技术在第三代移动通信中的应用,最后的指出软件无线电技术的美好前途。 相似文献
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尽管SDR概念已经在军用领域使用多年,但直到近期,成本敏感产品如汽车收音机和手机的设计者才得以认真考虑基于SDR的解决方案.摩尔定律和相应的利用数百万晶体管来制造高计算密集性信号处理芯片的能力是一项重大进展.NXP半导体的工程师已经创造了一种高度灵活的SDR概念,其中信号处理模块成为可以在不同标准之间共享的功能.本文中的汽车无线电接收机解决方案采用NXP及其合作伙伴拥有的嵌入式数字信号处理内核尖端技术,可立即适应目前在汽车中使用的一系列无线电标准,甚至可以利用软件来适应新的标准. 相似文献
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适用于软件无线电的下载技术探讨 总被引:2,自引:0,他引:2
软件无线电设备具有很大灵活性,它的功能主要由软件进行定义和配置,因而修改其软件就能对设备功能进行升级甚至重新定义。在无线网络环境中,无线电软件下载能够动态士也要新设备软件,然而它本身是一个非常复杂的过程。本文对这个问题展开了讨论,包括无线电软件下载的定义、范畴、分类方法以及具体的下载步骤;同时,也详细地论述了重配置管理以及安全性下载两个关键问题。 相似文献
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软件无线电中的调制方式识别 总被引:4,自引:0,他引:4
本文研究了一种应用于软件无线电系统中的数字信号调制方式的自动识别算法,特别适用于可以用正交解调的调制方式的识别,在解调的同时识别调制方式的方法.还给出了计算机的仿真,结果表明效果良好. 相似文献
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Michael Schulte John Glossner Sanjay Jinturkar Mayan Moudgill Suman Mamidi Stamatis Vassiliadis 《The Journal of VLSI Signal Processing》2006,43(2-3):143-159
Embedded digital signal processors for software defined radio have stringent design constraints including high computational
bandwidth, low power consumption, and low interrupt latency. Furthermore, due to rapidly evolving communication standards
with increasing code complexity, these processors must be compiler-friendly, so that code for them can quickly be developed
in a high-level language. In this paper, we present the design of the Sandblaster Processor, a low-power multithreaded digital
signal processor for software defined radio. The processor uses a unique combination of token triggered threading, powerful
compound instructions, and SIMD vector operations to provide real-time baseband processing capabilities with very low power
consumption. We describe the processor’s architecture and microarchitecture, along with various techniques for achieving high
performance and low power dissipation. We also describe the processor’s programming environment and the SB3010 platform, a
complete system-on-chip solution for software defined radio. Using a super-computer class vectorizing compiler, the SB3010
achieves real-time performance in software on a variety of communication protocols including 802.11b, GPS, AM/FM radio, Bluetooth,
GPRS, and WCDMA. In addition to providing a programmable platform for SDR, the processor also provides efficient support for
a wide variety of digital signal processing and multimedia applications.
Michael Schulte received a B.S. degree in Electrical Engineering from the University of Wisconsin-Madison in 1991, and M.S. and Ph.D. degrees
in Electrical Engineering from the University of Texas at Austin in 1992 and 1996, respectively. From 1996 to 2002, he was
an assistant and associate professor at Lehigh University, where he directed the Computer Architecture and Arithmetic Research
Laboratory. He is currently an assistant professor at the University of Wisconsin-Madison, where he leads the Madison Embedded
Systems and Architectures Group. His research interests include high-performance embedded processors, computer architecture,
domain-specific systems, computer arithmetic, and wireless systems. He is a senior member of the IEEE and the IEEE Computer
Society, and an associate editor for the IEEE Transactions on Computers and the Journal of VLSI Signal Processing.
John Glossner is CTO & Executive Vice President at Sandbridge Technologies. Prior to co-founding Sandbridge, John managed the Advanced
DSP Technology group, Broadband Transmission Systems group, and was Access Aggregation Business Development manager at IBM’s
T.J. Watson Research Center. Prior to IBM, John managed the software effort in Lucent/Motorola’s Starcore DSP design center.
John received a Ph.D. in Computer Architecture from TU Delft in the Netherlands for his work on a Multithreaded Java processor
with DSP capability. He also received an M.S. degree in Engineering Management and an M.S.E.E. from NTU. John also holds a
B.S.E.E. degree from Penn State. John has more than 60 publications and 12 issued patents.
Dr. Sanjay Jinturkar is the Director of Software at Sandbridge and manages the systems software and communications software groups. Previously,
he managed the software tools group at StarCore. He has a Ph.D in Computer Science from University of Virginia and holds 20
publications and 4 patents.
Mayan Moudgill obtained a Ph.D. in Computer Science from Cornell University in 1994, after which he joined IBM at the Thomas J. Watson Research
Center. He worked on a variety of computer architecture and compiler related projects, including the VLIW research compiler,
Linux ports for the 40x series embedded processors and simulators for the Power 4. In 2001, he co-founded Sandbridge Technologies,
a start-up that is developing digital signal processors targeted at 3G wireless phones.
Suman Mamidi is a graduate student in the Department of Electrical and Computer Engineering at the University of Wisconsin-Madison. He
received his M.S. degree from the University of Wisconsin-Madison in December, 2003 and is currently working towards his PhD.
His research interests include low-power processors, hardware accelerators, multithreaded processors, reconfigurable hardware,
and embedded systems.
Stamatis Vassiliadis was born in Manolates, Samos, Greece, in 1951. He is currently a Chair Professor in the Electrical Engineering, Mathematics,
and Computer Science (EEMCS) department of Delft University of Technology (TU Delft), The Netherlands. He previously served
in the Electrical and Computer Engineering faculties of Cornell University, Ithaca, NY and the State University of New York
(S.U.N.Y.), Binghamton, NY. For a decade, he worked with IBM, where he was involved in a number of advanced research and development
projects. He received numerous awards for his work, including 24 publication awards, 15 invention awards, and an outstanding
innovation award for engineering/scientific hardware design. His 73 USA patents rank him as the top all time IBM inventor.
Dr. Vassiliadis is an ACM fellow, an IEEE fellow and a member of the Royal Netherlands Academy of Arts and Sciences (KNAW). 相似文献
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This paper presents an RF front-end architecture for wideband software defined radio to function in 400 MHz to 3.5 GHz frequency
range. The frequency range covers almost all the existing standards (like GSM, UMYS, CDMA, WiFi etc.) as well as future standards
(like WiMax which is still to be deployed). Although the 400 MHz–3.5 GHz band is taken, the architecture allows designers
to design the front-end for any range of frequencies. In wideband front-ends, devices with high linearity are used to lower
the level of intermodulation products. There are different front-end architectures available for catering to wideband operation.
However, some of these, particularly the wideband ones suffer with intermodulation problem. This paper presents a partitioning
mechanism that uses multiple medium bands to limit the intermodulation problem. The proposed frequency-partitioning scheme
makes it possible to suppress intermodulation products further for front-end using devices of given linearity. Thus this helps
in achieving better performance along with relaxing the linearity requirement of devices. 相似文献
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Hiroyasu Ishikawa 《Wireless Personal Communications》2012,64(3):461-472
This paper introduces the concept of highly dependable wireless communications for wireless robotics based on software defined
radio (SDR) technologies. The features and advantages of SDR technologies are initially explained, whereupon the research
and development activities of KDDI R&D Laboratories are presented. Advanced applications of SDR for telerobotic control, which
require highly reliable wireless communications and for multi-mode wireless sensor networks are proposed as potential markets
for wireless robotics and machine to machine communication. Finally, the current status and research issues of SDR are summarized
and this paper is concluded. 相似文献
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R. Mahesh A. P. Vinod Edmund M-K. Lai Amos Omondi 《Journal of Signal Processing Systems》2011,62(2):157-171
The ability to support multiple channels of different communication standards, in the available bandwidth, is of importance
in modern software defined radio (SDR) receivers. An SDR receiver typically employs a channelizer to extract multiple narrowband
channels from the received wideband signal using digital filter banks. Since the filter bank channelizer is placed immediately
after the analog-to-digital converter (ADC), it must operate at the highest sampling rate in the digital front-end of the
receiver. Therefore, computationally efficient low complexity architectures are required for the implementation of the channelizer.
The compatibility of the filter bank with different communication standards requires dynamic reconfigurability. The design
and realization of dynamically reconfigurable, low complexity filter banks for SDR receivers is a challenging task. This paper
reviews some of the existing digital filter bank designs and investigates the potential of these filter banks for channelization
in multi-standard SDR receivers. We also review two low complexity, reconfigurable filter bank architectures for SDR channelizers
based respectively on the frequency response masking technique and a novel coefficient decimation technique, proposed by us
recently. These filter bank architectures outperform existing ones in terms of both dynamic reconfigurability and complexity. 相似文献
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软件无线电技术及其应用探讨 总被引:1,自引:0,他引:1
软件无线电的出现是无线电通信从模拟到数字、从固定到移动后,由硬件到软件的第三次变革,被认为是继模拟通信技术、数字通信技术之后的第三代无线通信技术。软件无线电以其极强的灵活性和开放性代表着无线通信系统的发展趋势。本文分别从软件无线电技术特点、关键技术、应用等方面分别进行了阐述。 相似文献
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该文介绍了软件无线电(Software Defined Radio)的定义,给出了软件无线电台的模型和解决方案。结合联合战术电台系统(JTRS)对软件无线电台的要求,论述了发展SDR电台需要解决的技术难题,并给出了软件无线电台的实例。 相似文献
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数字通信信号的产生主要是基带信号对载波进行调制,本文是通过软件无线电的思想来完成对基带信号可选择式的调制.本文设计中将2ASK、2FSK、2PSK三种调制方式集中于同一硬件平台之中,可以根据不同的要求采用不同的调制方式,改变了以往单一的调制方式,具有更大的灵活性. 相似文献