Now showing items 1-20 of 23

    • 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 ...
    • Baseband Signal Compression in Wireless Base Stations 

      Vosoughi, Aida; Wu, Michael; Cavallaro, Joseph R. (2012-12-01)
      To comply with the evolving wireless standards, base stations must provide greater data rates over the serial data link between base station processor and RF unit. This link is especially important in distributed antenna ...
    • 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 ...
    • Data Compression in Base Transceiver Systems 

      Vosoughi, Aida; Cavallaro, Joseph R.; Wu, Michael (2012-10)
    • A Fast and Efficient Sift Detector Using The Mobile GPU 

      Rister, Blaine; Wang, Guohui; Wu, Michael; Cavallaro, Joseph R. (2013-06)
      Emerging mobile applications, such as augmented reality, demand robust feature detection at high frame rates. We present an implementation of the popular Scale-Invariant Feature Transform (SIFT) feature detection algorithm ...
    • Flexible N-Way MIMO Detector on GPU 

      Wu, Michael; Yin, Bei; Cavallaro, Joseph R. (2012-10-17)
      This paper proposes a flexible Multiple-Input Multiple-Output (MIMO) detector on graphics processing units (GPU). MIMO detection is a key technology in broadband wireless system such as LTE,WiMAX, and 802.11n. Existing ...
    • 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 ...
    • GPU Accelerated Scalable Parallel Decoding of LDPC Codes 

      Wang, Guohui; Wu, Michael; Sun, Yang (2011-11-01)
      This paper proposes a flexible low-density parity-check (LDPC) decoder which leverages graphic processor units (GPU) to provide high decoding throughput. LDPC codes are widely adopted by the new emerging standards for ...
    • A GPU Implementation of a Real-Time MIMO Detector 

      Wu, Michael; Gupta, Siddharth; Sun, Yang; Cavallaro, Joseph R. (2009-10-01)
      Multiple-input multiple-output (MIMO) is an existing technique that can significantly increase throughput of the system by employing multiple antennas at the transmitter and the receiver. Realizing maximum benefit from ...
    • High-Throughput Data Detection for Massive MU-MIMO-OFDM Using Coordinate Descent 

      Wu, Michael; Dick, Chris; Cavallaro, Joseph R.; Studer, Christoph (2016)
      Data detection in massive multi-user (MU) multiple-input multiple-output (MIMO) wireless systems is among the most critical tasks due to the excessively high implementation complexity. In this paper, we propose a novel, ...
    • Implementation of a 3GPP LTE Turbo Decoder Accelerator on GPU 

      Wu, Michael; Cavallaro, Joseph R. (2010-10-01)
      This paper presents a 3GPP LTE compliant turbo decoder accelerator on GPU. The challenge of implementing a turbo decoder is finding an efficient mapping of the decoder algorithm on GPU, e.g. finding a good way to parallelize ...
    • Implementation of a High Throughput 3GPP Turbo Decoder on GPU 

      Wu, Michael; Sun, Yang; Wang, Guohui; Cavallaro, Joseph R. (2011-11-01)
      Turbo code is a computationally intensive channel code that is widely used in current and upcoming wireless standards. General-purpose graphics processor unit (GPGPU) is a programmable commodity processor that achieves ...
    • Implementation of a High Throughput Soft MIMO Detector on GPU 

      Wu, Michael; Sun, Yang; Gupta, Siddharth; Cavallaro, Joseph R. (2011-07-01)
      Multiple-input multiple-output (MIMO) significantly increases the throughput of a communication system by employing multiple antennas at the transmitter and the receiver. To extract maximum performance from a MIMO system, ...
    • Implementation Trade-Offs For Linear Detection In Large-Scale MIMO Systems 

      Yin, Bei; Wu, Michael; Studer, Christoph; Cavallaro, Joseph R.; Dick, Chris (2013-06)
      In this paper, we analyze the VLSI implementation tradeoffs for linear data detection in the uplink of large-scale multiple-input multiple-output (MIMO) wireless systems. Specifically, we analyze the error incurred by ...
    • Improving MIMO Sphere Detection Through Antenna Detection Order Scheduling 

      Wu, Michael; Dick, Chris; Cavallaro, Joseph R. (2011-12-01)
      This paper proposes a novel scalable Multiple-Input Multiple-Output (MIMO) detector that does not require preprocessing to achieve good bit error rate (BER) performance. MIMO processing is a key technology in broadband ...
    • Improving TLB Miss Handling with Page Table Pointer Caches 

      Wu, Michael; Zwaenepoel, Willy (1997-12-16)
      Page table pointer caches are a hardware supplement for TLBs that cache pointers to pages of page table entries rather than page table entries themselves. A PTPC traps and handles most TLB misses in hardware with low ...
    • Low Complexity Opportunistic Decoder for Network Coding 

      Yin, Bei; Wu, Michael; Wang, Guohui; Cavallaro, Joseph R. (2012-12-01)
      In this paper, we propose a novel opportunistic decoding scheme for network coding decoder which significantly reduces the decoder complexity and increases the throughput. Network coding was proposed to improve the ...
    • Low complexity scalable MIMO sphere detection through antenna detection reordering 

      Wu, Michael; Dick, Chris; Sun, Yang; Cavallaro, Joseph R. (2012-07-01)
      This paper describes a novel low complexity scalable multiple-input multiple-output (MIMO) detector that does not require preprocessing and the optimal squared l2-norm computations to achieve good bit error (BER) performance. ...
    • A Massively Parallel Implementation of QC-LDPC Decoder on GPU 

      Wang, Guohui; Wu, Michael; Sun, Yang; Cavallaro, Joseph R. (2011-06-01)
      The graphics processor unit (GPU) is able to provide a low-cost and flexible software-based multi-core architecture for high performance computing. However, it is still very challenging to efficiently map the real-world ...
    • On the application of graphics processor to wireless receiver design 

      Wu, Michael (2010)
      In many wireless systems, a Turbo decoder is often combined with a soft-output multiple-input and multiple-output (MIMO) detector at the receiver to maximize performance in many 4G and beyond wireless standards. Although ...