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作者： Huang, Bei You, Kaidi Chen, Yun Yu, Zhiyi Zeng, Xiaoyang State Key Lab of ASIC and System Fudan University China

Reed-Solomon (RS) codes are widely used in digital communication and storage systems. Unlike usual VLSI approaches, this paper presents a high throughput fully programmable Reed-Solomon decoder on a multi-core processor. The multi-core processor platform is a 2-Dimension mesh array of Single Instruction Multiple Data (SIMD) cores, and it is well suited for digital communication applications. By fully extracting the parallelizable operations of the RS decoding process, we propose multiple optimization techniques to improve system throughput, including: task level parallelism on different cores, data level parallelism on each SIMD core, minimizing memory access, and route length minimized task mapping techniques. For RS(255, 239, 8), experimental results show that our 12-core implementation achieve a throughput of 4.35 Gbps, which is much better than several other published implementations. From the results, it is predictable that the throughput is linear with the number of cores by our approach. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.

关键词： Parallel processing systems

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MCVP-NoC: Many-Core Virtual Platform with Networks-on-Chip support

MCVP-NoC: Many-Core Virtual Platform with Networks-on-Chip s...

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International Conference on asic

作者： Dexue Zhang Xiaoyang Zeng Zongyan Wang Weike Wang Xinhua Chen State Key Lab. of ASIC & System Fudan University Shanghai China College of Information Science and Engineering Shandong University of Science and Technology Qingdao China Qingdao ShanHai Microelectronics Co. Ltd. Qingdao China

Many-core SoC (MCSoC) design is one of chip design trends and challenges. Modeling and simulation for large scale MCSoC design is the key to get it right the first time. NoC is the most important component of future MCSoC. A novel modeling tool, MCVP-NoC (Many-Core Virtual Platform with Networks-on-Chip support) was designed for large scale MCSoC modeling, and can be used in design space exploration, early software development and system verification. MCVP-NoC was built on systemC, OVP(Open Virtual Platform) and TLM2.0, integrated with Orion2.0 for power and area estimation. MCVP-NoC can run real software code, and can be used to evaluate the performance of the MCSoC design under real application load.

关键词： Decoding Software Computer architecture Analytical models system-on-chip Estimation Nickel

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An efficient packing algorithm based on constraint satisfaction problem technique

An efficient packing algorithm based on constraint satisfact...

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8th Southern Programmable Logic Conference, SPL 2012

作者： Yang, M. Tong, Jiarong State Key Lab. of ASIC and System Fudan University Shanghai China

ISBN: (纸本)9781467301862

In this paper, an efficient packing algorithm based on constraint satisfaction problem technique is proposed for contemporary FPGA CLB architecture. No matter how complex the architecture is, there are a limited number of patterns, which can implement all functionalities of FPGA CLB logic. All the patterns are pre-designed and known as reference circuits. The proposed algorithm then matches the reference circuits from the given user logic circuit using specific constraints. Due to complex architecture of FPGA, to enumerate all the reference circuits in a fine-grain manner is impractical. Consequently, coarse-grain manner is adapted in the paper to overcome this problem. The experimental results show that the proposed algorithm achieves comparable performance in area and speed compared with literatures. © 2012 IEEE.

关键词： Field programmable gate arrays (FPGA)

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A unified 4/8/16/32-point integer IDCT architecture for multiple video coding standards

A unified 4/8/16/32-point integer IDCT architecture for mult...

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2012 13th IEEE International Conference on Multimedia and Expo, ICME 2012

作者： Shen, Sha Shen, Weiwei Fan, Yibo Zeng, Xiaoyang State Key Lab. of ASIC and System Fudan University Shanghai China

ISBN: (纸本)9781467316590

4 or 8-point IDCT are widely used in traditional video coding standards. However larger size (16/32-point) IDCT has been proposed in the next generation video standard such as HEVC. To fulfill this requirement, this work proposes a fast computational algorithm of large size integer IDCT. A unified VLSI architecture for 4/8/16/32-point integer IDCT is also proposed accordingly. It can support the following video standards: MPEG-2/4, H.264, AVS, VC-1 and HEVC. Multiplier less MCM (Multiple Constant Multiplication) is used for 4/8-point IDCT. The regular multipliers and sharing technique are used for 16/32-point IDCT. The transpose memory uses SRAM instead of the traditional register array in order to further reduce the hardware overhead. It can support real-time decoding of 4Kx2K (4096x2048) 30fps video sequence at 191MHz working frequency, with 93K gate count and 18944-bit SRAM. We suggest a normalized criterion called design efficiency to compare with previous works. It shows that this design is 31% more efficient than previous work. © 2012 IEEE.

关键词： Static random access storage

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Effective Radius Models of Nanoscale Elliptical Surrounding-Gate MOSFETs

Effective Radius Models of Nanoscale Elliptical Surrounding-...

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2012 IEEE 11th International Conference on Solid-state and Integrated Circuit Technology(ICSICT-2012)

作者： Ping Xiang Guangxi Hu Guanghui Mei Ran Liu Lingli Wang Tingao Tang State Key Lab of ASIC&System Department of MicroelectronicsFudan University

Effective radius models for the nanoscale elliptical Surrounding-Gate(SG)metal-oxide-semiconductor field-effect transistor(MOSFET)are *** characteristics of the elliptical SG MOSFET are simulated with TCAD simulation tools,the electric potential,drain to source current,and the subthreshold swing are *** simple effective radius models can be implanted in circuit simulations,and facilitate the practical use of the device.

关键词： MOSFET Effective Radius Models of Nanoscale Elliptical Surrounding-Gate MOSFETs

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The intrinsic coercive field for P(VDF-TrFE) thin-films with different thicknesses

The intrinsic coercive field for P(VDF-TrFE) thin-films with...

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International Symposium on Integrated Functionalities, ISIF 2011

作者： Liu, X.B. Jiang, A.Q. Tang, T.A. State Key Lab. of ASIC and System Fudan University Shanghai 200433 China

Generally, the organic ferroelectric P(VDF-TrFE) thin film is partially crystallized with a mixture of ferroelectric crystallites, non-crystalline molecules, and additional non-ferroelectric crystallites, e.g., Trifluoroethylene, in the copolymers. Therefore, it is almost impossible for the domains to switch under a normal field without incurring of charge injection across these non-ferroelectric phases. In this paper, we use an equivalent-circuit description of the film consisting of a non-ferroelectric layer in series with a ferroelectric layer. Based on the polynomial fitting of polarization switching/nonswitching results, we extract the intrinsic coercive field across the ferroelectric layer in the films with different thicknesses. Copyright © Taylor & Francis Group, LLC.

关键词： Equivalent circuits

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Mixed-signal system verification by systemC/systemC-AMS and HSIM-VCS in near field communication tag design

Mixed-signal system verification by SystemC/SystemC-AMS and ...

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International Conference on asic

作者： Zhaori Bi Wei Li Dian Zhou Xuan Zeng Sheng-Guo Wang Eric Jonsson School The University of Texas at Dallas Richardson U.S.A. State Key Lab. of ASIC & System Fudan University Shanghai China College of Engineering University of North Carolina at Charlotte Charlotte NC U.S.A.

Traditional circuit description languages such as SPICE, VHDL, and Verilog have limited capability of designing and verifying large scale mixed-signal systems, because they can only deal with analog or digital circuits and lack of flexibility of modeling complicated mixed-signal stimulus. This paper presents a verification method combining systemC/systemC-AMS and HSIM-VCS verification platforms to design a Near Field Communication (NFC) tag and verify its function under certain noise conditions.

关键词： Noise Modulation Integrated circuit modeling Clocks Load modeling Educational institutions Decoding

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FSK Modulation Scheme for High-Speed Optical Transmission

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ZTE Communications 2012年第3期10卷 2-11页

作者： Nan Chi Wuliang Fang Yufeng Shao Junwen Zhang Li Tao State Key Lab of ASIC&System and Department of Communication Science and EngineeringFudan UniversityShanghai 200433China

In this paper, we describe the generation, detection, and performance of frequency-shift keying （FSK） for high-speed optical transmission and label switching. A non-return-to-zero （NRZ） FSK signal is generated by using two continuous-wave （CW） lasers, one Mach-Zehnder modulator （MZM）, and one Mach-Zehnder delay interferometer （MZDI）. An RZ-FSK signal is generated by cascading a dual-arm MZM, which is driven by a sinusoidal voltage at half the bit rate. Demodulation can be achieved on 1 bit rate through one MZDI or an array waveguide grating （AWG） demultiplexer with balanced detection. We perform numerical simulation on two types of frequency modulation schemes using MZM or PM, and we determine the effect of frequency tone spacing （FTS） on the generated FSK signal. In the proposed scheme, a novel frequency modulation format has transmission advantages compared with traditional modulation formats such as RZ and differential phase-shift keying （DPSK）, under varying dispersion management. The performance of an RZ-FSK signal in a 4 x 40 Gb/s WDM transmission system is discussed. We experiment on transparent wavelength conversion based on four-wave mixing （FWM） in a semiconductor optical amplifier （SOA） and in a highly nonlinear dispersion shifted fiber （HNDSF） for a 40 Gb/s RZ-FSK signal. The feasibility of all-optical signal processing of a high-speed RZ-FSK signal is confirmed. We also determine the receiver power penalty for the RZ-FSK signal after a 100 km standard single-mode fiber （SMF） transmission link with matching dispersion compensating fiber （DCF）, under the post-compensation management scheme. Because the frequency modulation format is orthogonal to intensity modulation and vector modulation （polarization shift keying）, it can be used in the context of the combined modulation format to decrease the data rate or enhance the symbol rate. It can also be used in orthogonal label-switching as the modulation format for the payload or the label. As an example, we p

关键词： optical communication return-to-zero frequency shift keying Mach-Zehnder modulator Mach-Zehnder delay interferometer chromaticdispersion wavelength conversion label switching

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The effect of H2O2 and ammonia sulfate on the CMP of molybdenum

The effect of H2O2 and ammonia sulfate on the CMP of molybde...

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2012 International Conference on Planarization/CMP Technology, ICPT 2012

作者： Chen, Fei Zeng, Xu Xu, Jing-Bo Lu, Hai-Sheng Qu, Xin-Ping State key lab of ASIC and System Department of Microelectronics Fudan University Shanghai200433 China

ISBN: (纸本)9783800734528

The chemical mechanical polishing (CMP) of Molybdenum (Mo) using hydrogen peroxide based alkaline solution was investigated. The effects of pH value and the H2O2 concentration on the Mo polishing were studied. The static etching rate (SER) and polishing rate (PR) were much higher in the alkaline solution and H2O2 can greatly enhance both SER and PR of Mo. It is found that in the presence of AS, not only the PR of Mo increased, but also the ratio of PR to SER of Mo was increased. According to the electrochemical measurements and the X-ray photoelectron spectroscopy results, it is proposed that, AS can react with MoO42- to form soluble ammonium molybdate to promote the removal of Mo. © ICPT 2012 - International Conference on Planarization/CMP Technology, Proceedings. All rights reserved.

关键词： Hydrogen peroxide

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An Efficient Routing Scheme for Irregular Mesh NoCs

An Efficient Routing Scheme for Irregular Mesh NoCs

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2013 IEEE 4th International Conference on Electronics Information and Emergency Communication

作者： Qingli Xiao Hongzhou Fu Lu Zheng Dexue Zhang College of Information Science and Engineering Shandong University of Science and Technology State-Key Lab. of ASIC and System Fudan University

ISBN: (纸本)9781467349345

Topological structure is an important part of the design of network on chip systems. The majority of current NoC architectures employ mesh topology, but at some practical application, NoC systems often integrate a number of heterogeneous blocks, or some fabrication faults, reliability issues, may lead to the need of irregular topologies. Consequently, simplistic routing techniques such as XY scheme can not be employed in irregular topologies. This paper presents an efficient specific routing scheme for the irregular mesh network which can be guaranteed for the connection in irregular topologies. This paper applies routing tables (RT) to realize the algorithm and use OVP (Open Virtual Platforms)+ TLM (Transaction Level Modeling)+systemC to create a virtual platform, achieving a 16 xl6 irregular mesh topology of heterogeneous systems. Finally the routing scheme is applied to test specific real application network instances, and the result shows its connectivity and efficiency.

关键词： network on chip routing algorithms irregular mesh network.

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