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    Using binary-reflected gray coding for crosstalk mitigation of network on chip

    , Article Proceedings - 17th CSI International Symposium on Computer Architecture and Digital Systems, CADS 2013 ; 2013 , Pages 81-86 ; 9781479905621 (ISBN) Shirmohammadi, Z ; Miremadi, S. G ; Sharif University of Technology
    IEEE Computer Society  2013
    Abstract
    This paper proposes an efficient crosstalk mitigation method for Network-on-Chips. This method uses the binary-reflected Gray coding to send the proper code word into a channel. As the Gray code has reflective and unit distance properties, based on these facts, content of every flit is selected so that to minimize the number of forbidden transition patterns in the channel. A VHDL-based simulation is carried out for several channel widths. Simulation results show that the proposed method reduces the forbidden transitions up to 26% and can save power in NoC links  

    Analytical modelling of the interpixel thermal crosstalk in superconducting edge-transition bolometer arrays

    , Article Superconductor Science and Technology ; Volume 19, Issue 6 , 2006 , Pages 606-611 ; 09532048 (ISSN) Bozbey, A ; Fardmanesh, M ; Schubert, J ; Banzet, M ; Sharif University of Technology
    2006
    Abstract
    We present an analytical thermal model to explain the crosstalk in YBCO edge-transition bolometer arrays. The verification of the model was tested on sample array devices made of 200 and 400 nm YBCO films on LaAlO3 and SrTiO3 substrates. The model presented was able to explain the effects of the various physical parameters of the devices, such as the film thickness, operating temperature, and the device separation, which cause different response behaviours based on the variation of the related thermal crosstalk characteristics. In addition, the model is valid above the crosstalk-free modulation frequencies, where the effects of the thermal crosstalk on the response of the devices are... 

    On designing an efficient numerical-based forbidden pattern free crosstalk avoidance codec for reliable data transfer of NoCs

    , Article Microelectronics Reliability ; Volume 63 , 2016 , Pages 304-313 ; 00262714 (ISSN) Shirmohammadi, Z ; Miremadi, S. G ; Sharif University of Technology
    Elsevier Ltd 
    Abstract
    Inter-wire coupling capacitances can lead to crosstalk fault that is strongly dependent on the transition patterns appearing on the wires. These transition patterns can cause mutual influences between adjacent wires of NoCs and as a result threaten the reliability of data transfer seriously. To increase the reliability of NoCs against the crosstalk fault, Forbidden Pattern Free (FPFs) codes are used. To generate FPF codes, numerical systems are among the overhead-efficient mechanisms. The algorithms of numerical systems have direct effect on the amounts of the codec overheads including power consumption, area occupation and performance of NoCs. To find an overhead-efficient numerical system,... 

    S2AP: An efficient numerical-based crosstalk avoidance code for reliable data transfer of NoCs

    , Article 10th International Symposium on Reconfigurable and Communication-centric Systems-on-Chip,, 29 June 2015 through 1 July 2015 ; June , 2015 , Page(s): 1 - 6 ; 9781467379427 (ISBN) Shirmohammadi, Z ; Miremadi, S. G ; Janssen K ; DFG ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2015
    Abstract
    Data traversal in Network-on-Chips (NoCs) is threated by crosstalk fault seriously. Crosstalk fault leads to mutual influence between adjacent wires of NoCs and as a result endangers the reliability of data in NoCs. Crosstalk fault is strongly dependent on the transition patterns appearing on the wires of NoCs. Among these transitions, Triplet Opposite Directions (TODs) impose the worse crosstalk effects to the wires of NoCs. This paper proposes an efficient numerical-based coding mechanism called Summation-based-Subtracted-Added-Penultimate (S2AP) which alleviates crosstalk faults. This is done by completely removing TODs which are the main source of crosstalk faults in the channels of... 

    Addressing NoC reliability through an efficient fibonacci-based crosstalk avoidance codec design

    , Article Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 18 November 2015 through 20 November 2015 ; Volume 9530 , 2015 , Pages 756-770 ; 03029743 (ISSN); 9783319271361 (ISBN) Shirmohammadi, Z ; Miremadi, S. G ; Wang, G ; Perez, G. M ; Zomaya, A ; Li, K ; Sharif University of Technology
    Springer Verlag  2015
    Abstract
    The reliable transfer in Network on Chips (NoCs) can be threatened by crosstalk fault occurring in wires. Crossstalk fault is due to inter-wire coupling capacitance that based on the patterns of transitions appearing on the wires, significantly limits the reliability of NoCs. Among these transitions, 101 and 010 bit patterns impose the worst crosstalk effects to wires. This work intends to increase the reliability of NoCs against crosstalk faults by applying an improved Fibonacci-based numeral system, called Doubled-Penultimate Fibonacci (DP-Fibo). In the DP-Fibo coding algorithm, code words without ‘101’ and ‘010’ bit patterns are produced to reduce crosstalk faults. Experimental results... 

    3D-DPS: An efficient 3D-CAC for reliable data transfer in 3D ICs

    , Article Proceedings - 2016 12th European Dependable Computing Conference, EDCC 2016, 5 September 2016 through 9 September 2016 ; 2016 , Pages 97-107 ; 9781509015825 (ISBN) Shirmohammadi, Z ; Rohbani, N ; Miremadi, S. G ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2016
    Abstract
    Migration to Three Dimensional Integrated Circuits (3D ICs) can provide higher scalability, higher throughput, and lower power consumption with respect to Two Dimensional Integrated Circuits (2D ICs). Also, the latency bottleneck of interconnections in 2D ICs is efficiently solved in 3D ICs. This is due to the use of Through-Silicon-Vias (TSVs) in the communication structure of 3D ICs. TSVs are among the efficient fabrication mechanisms that connect stacked layers in 3D ICs. However, proximity and large size of TSVs make them highly prone to crosstalk faults. Crosstalk faults can cause mutual undesired influences between TSVs and thus seriously threat the reliability of data transfer on... 

    Crosstalk avoidance coding for reliable data transmission of network on chips

    , Article 2013 International Symposium on System-on-Chip, SoC 2013 - Proceedings ; 2013 Shirmohammadi, Z ; Miremadi, S. G ; Sharif University of Technology
    2013
    Abstract
    Inter-wire coupling capacitance may lead to crosstalk faults that significantly limits the reliability of NoCs. In this paper, we propose a numerical-based crosstalk avoidance code that can omit the Triplet Opposite Direction (TOD) transitions produced by crosstalk faults. The proposed coding does not have ambiguity and uses all of the codeword space. Simulations using VHDL for different channel widths show that the proposed method can reduce crosstalk fault in the NoC links with negligible power and area overheads  

    Crosstalk modeling to predict channel delay in Network-on-Chips

    , Article Proceedings - IEEE International Conference on Computer Design: VLSI in Computers and Processors, 3 October 2010 through 6 October 2010 ; October , 2010 , Pages 396-401 ; 10636404 (ISSN) ; 9781424489350 (ISBN) Patooghy, A ; Miremadi, S. G ; Shafaei, M ; Sharif University of Technology
    2010
    Abstract
    Communication channels in Network-on-Chips (NoCs) are highly susceptible to crosstalk faults due to the use of nano-scale VLSI technologies in the fabrication of NoCs. Crosstalk faults cause variable timing delay in NoC channels based on the patterns of transitions appearing on the channels. This paper proposes an analytical model to estimate the timing delay of an NoC channel in the presence of crosstalk faults. The model calculates expected number of 4C, 3C, 2C, and 1C transition patterns to predict delay of a K-bit communication channel. The model is applicable for both non-protected channels and channels which are protected by crosstalk mitigation methods. Spice simulations are done in a... 

    FiRot: An efficient crosstalk mitigation method for Network-on-Chips

    , Article Proceedings - 16th IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2010, 13 December 2010 through 15 December 2010 ; December , 2010 , Pages 55-61 ; 9780769542898 (ISBN) Patooghy, A ; Shafaei, M ; Miremadi, S. G ; Falahati, H ; Taheri, S ; Sharif University of Technology
    2010
    Abstract
    This paper proposes an efficient crosstalk mitigation method for Network-on-Chips (NoCs). The proposed method investigates flits in each packet to minimize the number of harmful transition patterns appearing on the communication channels of NoC. To do this, the content of every flit is rotated with respect to the previously flit sent through the channel. Rotation is done to find a rotated version of the flit which minimizes the number of harmful transition patterns. A tag field is added into the rotated flit to enable the receiving side to recover the original flit. Maximum number of rotations is bounded by a fixed value to minimize the timing and power overheads of the proposed method.... 

    Crosstalk reduction in hybrid quantum-classical networks

    , Article Scientia Iranica ; Volume 23, Issue 6 , 2016 , Pages 2898-2907 ; 10263098 (ISSN) Bahrani, S ; Razavi, M ; Salehi, J. A ; Sharif University of Technology
    Sharif University of Technology  2016
    Abstract
    In this paper, we propose and investigate several crosstalk reduction techniques for hybrid quantum-classical dense-wavelength-division-multiplexing systems. The transmission of intense classical signals alongside weak quantum ones on the same fiber introduces some crosstalk noise, mainly due to Raman scattering and non-ideal channel isolation, that may severely affect the performance of quantum key distribution systems. We examine the conventional methods of suppressing this crosstalk noise, and enhance them by proposing an appropriate channel allocation method that reduces the background crosstalk effectively. Another approach proposed in this paper is the usage of orthogonal frequency... 

    ST-CAC: a low-cost crosstalk avoidance coding mechanism based on three-valued numerical system

    , Article Journal of Supercomputing ; Volume 77, Issue 7 , 2021 , Pages 6692-6713 ; 09208542 (ISSN) Shirmohammadi, Z ; Khorami, A ; Omana, M. E ; Sharif University of Technology
    Springer  2021
    Abstract
    Appearances of specific transition patterns during data transfer in bus lines of modern high-performance computing systems, such as communicating structures of accelerators for deep convolutional neural networks, commercial Network on Chips, and memories, can lead to crosstalk faults. With the shrinkage of technology size, crosstalk faults occurrence boosts and leads to degradation of reliability and performance, as well as the increasing power consumption of lines. One effective way to alleviate crosstalk faults is to avoid the appearance of these specific transition patterns by using numerical-based crosstalk avoidance codes (CACs). However, a serious problem with numerical-based CACs is... 

    Crosstalk elimination in the detection of dual-beam optical tweezers by spatial filtering

    , Article Review of Scientific Instruments ; Volume 85, Issue 5 , May , 2014 ; ISSN: 00346748 Ott, D ; Reihani, S. N. S ; Oddershede, L. B ; Sharif University of Technology
    Abstract
    In dual-beam optical tweezers, the accuracy of position and force measurements is often compromised by crosstalk between the two detected signals, this crosstalk leading to systematic and significant errors on the measured forces and distances. This is true both for dual-beam optical traps where the splitting of the two traps is done by polarization optics and for dual optical traps constructed by other methods, e.g., holographic tweezers. If the two traps are orthogonally polarized, most often crosstalk is minimized by inserting polarization optics in front of the detector; however, this method is not perfect because of the de-polarization of the trapping beam introduced by the required... 

    Efficient elimination of cross-talk in dual-beam optical tweezers by spatial filtering

    , Article Optical Molecular Probes, Imaging and Drug Delivery, OMP 2013, Waikoloa Beach, HI ; 14-18 April , 2013 ; 9781557529664 (ISBN) Ott, D ; Reihani, S. N. S ; Oddershede, L. B ; Sharif University of Technology
    2013
    Abstract
    In dual-beam optical traps, the precision of position/force measurements is often compromised by crosstalk, i.e. imperfect separation of the two signals. We devise a simple yet very efficient method to perform crosstalk eliminating spatial filtering  

    ACM: Accurate crosstalk modeling to predict channel delay in Network-on-Chips

    , Article 2016 IEEE 22nd International Symposium on On-Line Testing and Robust System Design, IOLTS 2016, 4 July 2016 through 6 July 2016 ; 2016 , Pages 7-8 ; 9781509015061 (ISBN) Mahdavi, Z ; Shirmohammadi, Z ; Miremadi, S. G ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2016
    Abstract
    The severity of timing delay in the communication channels of Network on Chip (NoC) depends on the transition patterns appearing on the wires. An analytical model can estimate the timing delay in NoC channels in the presence of crosstalk faults. However, recently proposed analytical model does not have enough accuracy and is based on 3-wire delay model. In this paper, an Accurate Crosstalk Model (ACM) based on 5-wire delay model is proposed to estimate the delay of communication channels in the presence of crosstalk faults. ACM is more accurate due to considering more wires in the delay model and also considering the overlaps between locations of transition patterns  

    AM3D: An accurate crosstalk probability modeling to predict channel delay in 3D ICs

    , Article Microelectronics Reliability ; Volume 102 , 2019 ; 00262714 (ISSN) Shirmohammadi, Z ; Nikoofard, A ; Ershadi, G ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Migration from Two Dimensional Integrated Circuits (2D ICs) to Three Dimensional Integrated Circuits (3D ICs) reduces the delay due to the shorter wire length between sender and receiver. However, Through-Silicon-Vias (TSVs) that connect layers in the structure of 3D ICs can seriously increase the delay due to capacitance coupling between TSVs and lead to crosstalk fault. The severity of crosstalk faults depends on transitions appearing on TSVs that is called transition patterns. To propose an efficient crosstalk tackling mechanisms in 3D ICs, an accurate probability analytical model is required to predict the delay caused by TSVs (3D ICs) in the attendance of these transition patterns. In... 

    Iterative multi-user power allocation: Performance evaluation & modification

    , Article IEEE TENCON 2004 - 2004 IEEE Region 10 Conference: Analog and Digital Techniques in Electrical Engineering, Chiang Mai, 21 November 2004 through 24 November 2004 ; Volume C , 2004 , Pages C216-C219 Bagheri, H ; Pakravan, M. R ; Khalaj, B. H ; IEEE Region 10 ; Sharif University of Technology
    2004
    Abstract
    Crosstalk is the major limiting factor in DSL systems in terms of bit-rate or service coverage. Multiuser power control algorithms can be used to combat crosstalk degrading effects. The best ever known distributed power control solution is Iterative Water-filling (IWF). In this paper the performance of IWF in an ADSL system is considered in terms of offered rate-region and convergence speed. Then two novel modifications are proposed to accelerate convergence (usually 100-400%) without any performance loss. Therefore it suits better in practical applications, since each iteration needs re-initialization of the modem. © 2004IEEE  

    A reliable and power efficient flow-control method to eliminate crosstalk faults in network-on-chips

    , Article Microprocessors and Microsystems ; Volume 35, Issue 8 , 2011 , Pages 766-778 ; 01419331 (ISSN) Patooghy, A ; Miremadi, S. G ; Tabkhi, H ; Sharif University of Technology
    Abstract
    This paper proposes a power-efficient flow-control method to tackle the problem of crosstalk faults in Network-on-Chips (NoCs). The method, called FRR (Flit Reordering/Rotation), combines three coding mechanisms to entirely eliminate opposite direction transitions (OD transitions) as the source of crosstalk faults in NoC communication channels. The first mechanism, called flit-reordering, reorders flits of every packet to find a flit sequence which produces the lowest number of OD transitions on NoC channels. The second mechanism called flit-rotation, logically rotates the content of every flit of the packet with respect to previously sent flit to achieve even more reduction in the number of... 

    PAM: A packet manipulation mechanism for mitigating crosstalk faults in NoCs

    , Article Proceedings - 15th IEEE International Conference on Computer and Information Technology, CIT 2015, 14th IEEE International Conference on Ubiquitous Computing and Communications, IUCC 2015, 13th IEEE International Conference on Dependable, Autonomic and Secure Computing, DASC 2015 and 13th IEEE International Conference on Pervasive Intelligence and Computing, PICom 2015, 26 October 2015 through 28 October 2015 ; October , 2015 , Pages 1895-1902 ; 9781509001545 (ISBN) Shirmohammadi, Z ; Ansari, M ; Abharian, S. K ; Safari, S ; Miremadi, S. G ; Atzori L ; Jin X ; Jarvis S ; Liu L ; Calvo R. A ; Hu J ; Min G ; Georgalas N ; Wu Y ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2015
    Abstract
    This paper proposes an efficient mechanism that mitigates crosstalk faults in Network-on-Chips (NoCs). This is done by using a Packet Manipulating mechanism called PAM for reliable data transfer of NoCs. PAM investigates the transitions of a packet to minimize the forbidden transition patterns appearing during the flit traversal in NoCs. To do this, the content of a packet is manipulated using three different manipulating mechanisms. In other words, PAM manipulates the content of packet in three manipulating modes including: vertical, horizontal and diagonal modes. Then, comparing the transitions of these manipulating mechanisms, a packet with minimum numbers of transitions is selected to be... 

    Significant crosstalk reduction using all-dielectric CMOS-compatible metamaterials

    , Article IEEE Photonics Technology Letters ; Volume 28, Issue 24 , 2016 , Pages 2787-2790 ; 10411135 (ISSN) Khavasi, A ; Chrostowski, L ; Lu, Z ; Bojko, R ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2016
    Abstract
    A recent computational result suggests that highly confined modes can be realized by all-dielectric metamaterials. This substantially decreases crosstalk between dielectric waveguides, paving the way for high-density photonic circuits. Here, we experimentally demonstrate, on a standard silicon-on-insulator platform, that using a simple metamaterial between two silicon strip waveguides results in about a tenfold increase in coupling length. The proposed structure may lead to significant reduction in the size of devices in silicon photonics  

    Substrate and device pattern dependence of the thermal crosstalk in y Ba 2Cu 3O 7-δ transition edge bolometer arrays

    , Article IEEE Transactions on Applied Superconductivity ; Volume 16, Issue 4 , 2006 , Pages 1953-1958 ; 10518223 (ISSN) Bozbey, A ; Fardmanesh, M ; Schubert, J ; Banzet, M ; Sharif University of Technology
    2006
    Abstract
    Using YBa 2Cu 3O 7-δ (YBCO) thin films, pulsed laser deposited on 1-mm-thick LaAlO 3 or SrTiO 3 substrates, we made 4 × 1 pixel arrays of transition edge bolometers with separations between neighboring pixels ranging from 40 μm to 170 μm for testing purposes. We investigated the effects of the YBCO film thickness (200 and 400 nm), substrate material, and back-etching of the substrate, on the crosstalk between the pixels of the arrays. The investigation was based on the analysis of the voltage response of the dc current biased bolometers versus the modulation frequency of a near-infrared laser source. We observed that the bolometer arrays made of 400-nm-thick films had less interpixel thermal...