Ramin Baghaie

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In a Code Division Multiple Access system operating in a multipath fading channel, a bank of RAKE receivers is needed for each active user at the base station. In this paper, low-power RAKE receivers are proposed that utilize the Strength Reduction (SR) transformation technique. The SR transformation can result in remarkable savings in consumed power and(More)
In this paper, we consider the implementation of two iterative methods: the Gram-Schmidt Conjugate Direction (GSCD) and Conjugate Gradient (CG) algorithm. We first study the convergence properties of the algorithms. Furthermore, the fixed-point implementation of both CG and GSCD are presented. For the simulations purposes, the algorithms are applied to a(More)
Pipelined implementation of an adaptive Direct-Sequence Code Division Multiple Access (DS-CDMA) receiver is proposed when multiple antennas are utilized for mobile communications. Adaptive multiple-antenna receivers can provide insensitivity to the interfering powers and room for more users or require smaller number of antennas than the matched filter(More)
OBJECTIVES The present study was aimed to identify the preoperative, intraoperative, and postoperative predictors of AF in a pure cohort of the patients with coronary artery disease who underwent CABG surgery. METHODS Between November 2005 and May 2006, 302 consecutive patients were included in this prospective study. All the relevant clinical,(More)
Adaptive multiple-antenna receivers can provide insensitivity to the interfering powers and room for more users or they require smaller number of antennas compared to the matched filter solution. In this paper, pipelined implementation of an adaptive Direct-Sequence Code Division Multiple Access receiver is proposed when multiple antennas are utilized for(More)
This paper considers the implementation of a signal subspace based mobile user tracking system that utilizes an efficient Conjugate Gradient (CG) based step-by-step adaptation scheme. First, we estimate the computational complexity of different units of the tracking system. Based on these estimations, we partition the implementation task into two parts:(More)