Farhad Zarringhalam received a BEng degree in Electronics and Ph.D. in Wireless Communications from King’s College London, in 2003 and 2007, respectively. During his PhD he worked with Nokia, UK, on adaptive methods of resource allocation and optimisation in cellular networks and published several journal and conference papers. He currently works for Quod Financial, London.
Published in: VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, 2005. Date of Conference: 28-28 September 2005 Date Added to IEEE Xplore: 16 January 2006 Print ISBN:0-7803-9152-7 Print ISSN: 1090-3038 Introduction CDMA systems are capacity limited by the maximum tolerable level of interference received at the cellular base station (BS). This multiple access interference (MAI) or
In this contribution we examine the joint optimization of the outer-loop power control (OLPC) and spreading factor in order to improve the spectral efficiency in the uplink of wideband code-division multiple-access (WCDMA) systems, in the presence of additive white Gaussian noise (AWGN) and multiple access interference (MAI), and while maintaining
We propose a technique for enhancing the achievable spectral efficiency of multiuser direct-sequence code-division multiple-access (DS-CDMA) channels in the presence of additive white Gaussian noise (AWGN) and multiple access interference (MAI). The proposed scheme is the joint optimization of outer loop power control and variable spreading factors (VSFs). The optimum
We propose a technique for enhancing the achievable spectral efficiency of multiuser direct-sequence code-division multiple-access (DS-CDMA) fading channels in the presence of additive white Gaussian noise (AWGN) and multiple access interference (MAI). The proposed scheme involves the joint optimization of outer loop power control (OLPC) and rate control using variable
In CDMA systems, outer loop power control (OLPC) determines the target value of SNR at the receiver, mostly by using look-up tables to map bit error rates (BERs) to SNR-targets. In this contribution, transmission delay and packet loss rate constraints in the data link layer (DLL) are invoked in order
In CDMA systems, outer loop power control (OLPC) determines the target value of SNR at the receiver, mostly by using look-up tables to map bit error rates (BERs) to SNRtargets. In this contribution, transmission delay and packet loss rate constraints in the data link layer (DLL) are invoked in order
Joint optimization of outer loop power control (OLPC) signal to noise ratio-target (SNR-target) and variable spreading factor (VSF), at the physical(PHY)-layer, with truncated automatic repeat request (ARQ), at data link layer (DLL), in accordance to the number of active users in the cell is considered. This investigation is on a