Now showing items 1-20 of 23

    • Application-Specific Accelerators for Communications 

      Sun, Yang; Amiri, Kiarash; Brogioli, Michael; Cavallaro, Joseph R. (2010-01-01)
      For computation-intensive digital signal processing algorithms, complexity is exceeding the processing capabilities of general-purpose digital signal processors (DSPs). In some of these applications, DSP hardware accelerators ...
    • Architecture and Algorithm for a Stochastic Soft-output MIMO Detector 

      Amiri, Kiarash; Radosavljevic, Predrag; Cavallaro, Joseph R. (2007-11-04)
      In this paper, we propose a novel architecture for a soft-output stochastic detector in multiple-input, multiple-output (MIMO) systems. The stochastic properties of this detector are studied and derived in this work, ...
    • Architecture and Algorithm for a Stochastic Soft-output MIMO Detector 

      Amiri, Kiarash; Radosavljevic, Predrag; Cavallaro, Joseph R. (2007-11-01)
      In this paper, we propose a novel architecture for a soft-output stochastic detector in multiple-input, multiple-output (MIMO) systems. The stochastic properties of this detector are studied and derived in this work, and ...
    • Architecture for detection in MIMO wireless systems 

      Amiri, Kiarash (2007)
      In this work, we study two main classes of detectors for spatially multiplexed Multiple-input Multiple-output (MIMO) systems. For the first group, i.e. hard-decision detectors, we study sphere detectors, and propose novel ...
    • Architectures for Cognitive Radio Testbeds and Demonstrators – An Overview 

      Gustafsson, Oscar; Amiri, Kiarash; Andersson, Dennis; Blad, Anton; Bonner, Christian; Cavallaro, Joseph R.; Declerck, Jeroen; Dejonghe, Antoine; Eliardsson, Patrik; Glasse, Miguel; Hayar, Aawatif; Hollevoet, Lieven; Hunter, Chris; Joshi, Madhura; Kaltenberger, Florian; Knopp, Raymond; Le, Khanh; Miljanic, Zoran; Murphy, Patrick; Naessens, Frederik; Nikaein, Navid; Nussbaum, Dominique; Pacalet, Renaud; Raghavan, Praveen; Sabharwal, Ashutosh; Sarode, Onkar; Spasojevic, Predrag; Sun, Yang; Tullberg, Hugo M.; Vander Aa, Tom; Van der Perre, Liesbet; Wetterwald, Michelle; Wu, Michael (2010-06-01)
      Wireless communication standards are developed at an ever-increasing rate of pace, and significant amounts of effort is put into research for new communication methods and concepts. On the physical layer, such topics include ...
    • Cooperative Partial Detection for MIMO Relay Networks 

      Amiri, Kiarash (2011)
      Cooperative communication has recently re-emerged as a possible paradigm shift to realize the promises of the ever increasing wireless communication market; how- ever, there have been few, if any, studies to translate ...
    • Cooperative Partial Detection for MIMO Relay Networks 

      Amiri, Kiarash (2011)
      Cooperative communication has recently re-emerged as a possible paradigm shift to realize the promises of the ever increasing wireless communication market; however, there have been few, if any, studies to translate ...
    • Cooperative Partial Detection Using MIMO Relays 

      Amiri, Kiarash; Wu, Michael; Cavallaro, Joseph R.; Lilleberg, Jorma (2011-10-01)
      Using multiple-input multiple-output (MIMO) relays in cooperative communication improves the data rate and reliability of the communication. The MIMO transmission, however, requires considerable resources for the detection ...
    • Design and Architecture of Spatial Multiplexing MIMO Decoders for FPGAs 

      Dick, Chris; Amiri, Kiarash; Cavallaro, Joseph R.; Rao, Raghu (2008-10-01)
      Spatial multiplexing multiple-input-multiple-output (MIMO) communication systems have recently drawn significant attention as a means to achieve tremendous gains in wireless system capacity and link reliability. The optimal ...
    • Flex-Sphere: An FPGA Configurable Sort-Free Sphere Detector For Multi-user MIMO Wireless Systems 

      Amiri, Kiarash; Dick, Chris; Rao, Raghu; Cavallaro, Joseph R. (2008-10-01)
      Spatial division multiplexing (SDM) in MIMO technology significantly increases the spectral efficiency, and hence capacity, of a wireless communication system: it is a core component of the next generation wireless systems, ...
    • FPGA Implementation of Dynamic Threshold Sphere Detection for MIMO Systems 

      Amiri, Kiarash; Cavallaro, Joseph R. (2006-11-01)
      In this paper, we consider the FPGA implementation of a modified sphere detection algorithm. We analyze breadth-first and depth-first search in sphere detection, and compare the relative performance and complexity. Based ...
    • FPGA in Wireless Communications Applications 

      Amiri, Kiarash; Duarte, Melissa; Cavallaro, Joseph R.; Dick, Chris; Rao, Raghu; Sabharwal, Ashutosh (2012-07-12)
      In the past decade we have witnessed explosive growth in the wireless communications industry with over 4 billion subscribers worldwide. While first and second generation systems focused on voice communications, third ...
    • FPGA Prototyping of A High Data Rate LTE Uplink Baseband Receiver 

      Wang, Guohui; Yin, Bei; Amiri, Kiarash; Sun, Yang; Wu, Michael; Cavallaro, Joseph R. (2009-11-01)
      The Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard is becoming the appropriate choice to pave the way for the next generation wireless and cellular standards. While the popular OFDM ...
    • A High Throughput Configurable SDR Detector for Multi-user MIMO Wireless Systems 

      Amiri, Kiarash; Cavallaro, Joseph R.; Dick, Chris; Rao, Raghu Mysore (2011-02-01)
      Spatial division multiplexing (SDM) in MIMO technology significantly increases the spectral efficiency, and hence capacity, of a wireless communication system: it is a core component of the next generation wireless systems, ...
    • A High Throughput Configurable SDR Detector for Multi-user MIMO Wireless Systems 

      Amiri, Kiarash; Cavallaro, Joseph R.; Dick, Chris; Rao, Raghu Mysore (2009-04-08)
      Spatial division multiplexing (SDM) in MIMO technology significantly increases the spectral efficiency, and hence capacity, of a wireless communication system: it is a core component of the next generation wireless ...
    • High-Level Design Tools for Complex DSP Applications 

      Sun, Yang; Amiri, Kiarash; Wang, Guohui; Yin, Bei; Cavallaro, Joseph R.; Ly, Tai (2012-07-12)
      High-level synthesis design methodology - High level synthesis (HLS) [1], also known as behavioral synthesis and algorithmic synthesis, is a design process in which a high level, functional description of a design is ...
    • Novel Sort-Free Detector with Modified Real-Valued Decomposition (M-RVD) Ordering in MIMO Systems 

      Amiri, Kiarash; Dick, Chris; Rao, Raghu; Cavallaro, Joseph R. (2008-11-01)
      K-best MIMO detection technique is the prominent method of simplifying the detection complexity in MIMO systems while maintaining BER performance comparable with the optimum maximum-likelihood (ML) detection technique. ...
    • Partial Detection for Multiple Antenna Cooperation 

      Amiri, Kiarash; Cavallaro, Joseph R. (2009-03-01)
      Multi-antenna relays can significantly increase the speed and reliability of wireless systems. However, because of the complexity of MIMO detection, there is considerable overhead in implementing a MIMO relay if the ...
    • Physical Layer Algorithm and Hardware Verification of MIMO Relays Using Cooperative Partial Detection 

      Amiri, Kiarash; Wu, Michael; Duarte, Melissa; Cavallaro, Joseph R. (2010-03-01)
      Cooperative communication with multi-antenna relays can significantly increase the reliability and speed. However, cooperative MIMO detection would impose considerable complexity overhead onto the relay if a full ...
    • Reconfigurable Multi-Standard Uplink MIMO Receiver with Partial Interference Cancellation 

      Yin, Bei; Amiri, Kiarash; Cavallaro, Joseph R.; Guo, Yuanbin (2012-06-01)
      As HSPA/HSPA+ and LTE/LTE-A evolve in parallel, the reconfigurability of a receiver to support multiple standards has become more and more important, especially for small cells. In this paper, we first suggest a reconfigurable ...