Now showing items 1-11 of 11

  • Channel Estimation and Signal Detection for Multi-Carrier CDMA Systems with Pulse-Shaping Filter 

    Borran, Mohammad Jaber; Varshney, Prabodh; Vilpponen, Hannu; Papadimitriou, Panayiotis (2003-05-20)
    We consider the problem of digital communication in a fading environment using the Multi-Carrier CDMA technology. By incorporating the effect of the pulse-shaping filter in the channel estimation and signal detection ...
  • Communication Processors 

    Rajagopal, Sridhar; Cavallaro, Joseph R. (Wiley, 2005-07-01)
    Communication processors are processors with specific optimizations to support communication sys-tems. Communication processors exist in a wide variety of forms and can be categorized based on the communication system, ...
  • Computationally Efficient Multiuser Detectors 

    Das, Suman; Cavallaro, Joseph R.; Aazhang, Behnaam (1997-09-20)
    CDMA is becoming an increasingly popular multiplexing scheme in wireless communications and this has necessitated the development of efficient detection techniques. The exponential complexity of the optimal detector on ...
  • Constellations for Imperfect Channel State Information at the Receiver 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2002-10-20)
    We consider the problem of digital communication in a Rayleigh flat fading environment using a multiple antenna system. We assume that the transmitter doesn't know the channel coefficients, and that the receiver has only ...
  • Data-parallel Digital Signal Processors: Algorithm Mapping, Architecture Scaling and Workload Adaptation 

    Rajagopal, Sridhar (2004-05-01)
    Emerging applications such as high definition television (HDTV), streaming video, image processing in embedded applications and signal processing in high-speed wireless communications are driving a need for high performance ...
  • On Design Criteria and Construction of Non-coherent Space-Time Constellations 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-10-20)
    We consider the problem of digital communication in a Rayleigh flat fading environment using a multiple-antenna system, when the channel state information is available neither at the transmitter nor at the receiver. It ...
  • On Design Criteria and Construction of Non-coherent Space-Time Constellations 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam; Johnson, Don (2002-07-20)
    We consider the problem of digital communication in a Rayleigh flat fading environment using a multiple antenna system, when both the transmitter and the receiver are unaware of the channel coefficients. Using Stein's lemma ...
  • Partially Coherent Constellations for Multiple-Antenna Systems 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam; Varshney, Prabodh (2003-11-20)
    We consider the problem of digital communication in a Rayleigh flat fading environment using a multiple antenna system. We assume that the transmitter doesnâ t know the channel coefficients, and that the receiver has only ...
  • Partially Coherent Multiple Antenna Systems: Design Criterion and Construction Methods for Constellations and Coded Modulation 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-01-15)
    We consider multiple-antenna communication systems in Rayleigh fading channel, where the transmitter does not know the channel coefficients and the receiver has only an estimate of them. We further assume that the transmitter ...
  • Power-Efficient Non-coherent Space-Time Constellations 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-07-20)
    We consider the problem of digital communication in a Rayleigh flat-fading environment using a multiple-antenna system, when the channel state information is available neither at the transmitter nor at the receiver. It ...
  • A Recursive Construction for Low-Complexity Non-coherent Constellations 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-04-01)
    It is known that at high signal to noise ratio (SNR), or for large coherence interval (T), a constellations of unitary matrices can achieve the capacity of the non-coherent multiple-antenna system in block Rayleigh flat-fading ...