Title :
Dynamic signal enumeration algorithm for smart antennas
Author :
Green, Peter J. ; Taylor, Desmond P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Canterbury Univ., Christchurch, New Zealand
fDate :
6/1/2002 12:00:00 AM
Abstract :
This paper develops a method to enumerate the incident signals impinging on a uniform linear array (ULA) independent of the extent of their correlation in a Rayleigh flat fading channel environment. The method also minimizes the number of antennas to the number of signals and adapts continuously to maintain performance in a mobile environment where users (signals) come and go. It ensures that the amount of computation is kept to a minimum and, in a practical system, can reallocate computational resources to other applications. The technique is a modification of the matrix decomposition method of Cozzens and Sousa (1994). A new set of stability, stopping, and adaptive control criteria is presented. An algorithm is formulated, and simulation results are presented, showing performance and behavior at various signal-to-noise ratios (SNRs). Limitations of the algorithm in enumerating closely spaced signals are also presented
Keywords :
Rayleigh channels; adaptive antenna arrays; adaptive control; array signal processing; land mobile radio; linear antenna arrays; matrix decomposition; noise; telecommunication control; Rayleigh flat fading channel; SNR; adaptive control; antenna array processing; closely spaced signals; dynamic signal enumeration algorithm; high-resolution parameter estimation algorithms; matrix decomposition method; mobile environment; signal-to-noise ratios; simulation results; smart antennas; stability criteria; stopping criteria; uniform linear array; Adaptive arrays; Adaptive control; Computational modeling; Fading; Heuristic algorithms; Linear antenna arrays; Matrix decomposition; Mobile antennas; Signal to noise ratio; Stability criteria;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2002.1003056