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Vincent K.N. Lau

  1. Decentralized Dynamic Hop Selection and Power Control in Cognitive Multi-hop Relay Systems.

    Чт, 07/29/2010 - 15:01 — SomNambul
    Authors: Vincent K.N. Lau, Liangzhong Ruan
    Subjects: Information Theory
    Abstract

    In this paper, we consider a cognitive multi-hop relay secondary user (SU)
    system sharing the spectrum with some primary users (PU). The transmit power as
    well as the hop selection of the cognitive relays can be dynamically adapted
    according to the local (and causal) knowledge of the instantaneous channel
    state information (CSI) in the multi-hop SU system. We shall determine a low
    complexity, decentralized algorithm to maximize the average end-to-end
    throughput of the SU system with dynamic spatial reuse.

  2. Design and Analysis of Multi-User SDMA Systems with Noisy Limited CSIT Feedback.

    Втр, 01/19/2010 - 16:01 — SomNambul
    Authors: Tianyu Wu, Vincent K.N. Lau
    Subjects: Information Theory
    Abstract

    In this paper, we consider spatial-division multiple-access (SDMA) systems
    with one base station with multiple antennae and a number of single antenna
    mobiles under noisy limited CSIT feedback. We propose a robust noisy limited
    feedback design for SDMA systems. The solution consists of a real-time robust
    SDMA precoding, user selection and rate adaptation as well as an offline
    feedback index assignment algorithm. The index assignment problem is cast into
    a Traveling Sales Man problem (TSP).

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