Title :
SIR estimation in CDMA cellular systems using subspace tracking
Author :
Ramakrishna, Deepa ; Mandayam, Narayan B. ; Yates, Roy D.
Author_Institution :
Wireless Inf. Network Lab., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Several radio resource management algorithms such as power control and handoff use the signal-to-interference ratio (SIR) as a control parameter. We address the problem on how to obtain fast and accurate measurements of this quantity in the context of a time varying channel. We develop, a subspace based SIR tracking algorithm for CDMA cellular systems. Analysis and simulation results for an IS-95 like system show that the SIR can be estimated to within 80 percent of the actual SIR after less than 7 frames, or within 90 percent of the actual SIR after less than 15 frames.
Keywords :
cellular radio; code division multiple access; land mobile radio; power control; radiofrequency interference; telecommunication control; time-varying channels; tracking; CDMA cellular systems; IS-95 like system; SIR estimation; control parameter; eigenvalue decomposition; handoff; measurements; power control; radio resource management algorithms; signal-to-interference ratio; simulation results; subspace based SIR tracking algorithm; time varying channel; Binary search trees; Computer networks; Diversity reception; Intelligent networks; Interference; Laboratories; Multiaccess communication; Power control; Propagation delay; Resource management;
Conference_Titel :
Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on
Print_ISBN :
0-8186-8316-3
DOI :
10.1109/ACSSC.1997.680046
