Articles Joint optimisation of spreading factor and outerloop power control for DS-CDMA November 12, 2025 / November 30, 2025 by mrkadmin 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 multiuser interference (MUI) imposes an […] Read more » f zarringhalam f.zarringhalam farhad zarringhalam zarrin ghalam
Articles Adaptive Resource Allocation for Spectral Efficiency Maximization in Uplink WCDMA November 12, 2025 / November 30, 2025 by mrkadmin 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 an average transmit power constraint. […] Read more » f zarringhalam f.zarringhalam farhad zarringhalam zarrin ghalam
Articles Adaptive Power and Rate Transmission with Single and Multi-User Detection November 12, 2025 / November 30, 2025 by mrkadmin 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 SNR-target, the SNR that results […] Read more » f zarringhalam f.zarringhalam farhad zarringhalam zarrin ghalam
Articles Jointly optimized rate and outer loop power control with single- and multi-user detection November 12, 2025 / November 30, 2025 by mrkadmin 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 spreading factors (VSFs). The optimality […] Read more » f zarringhalam f.zarringhalam farhad zarringhalam zarrin ghalam
Articles Joint Physical Layer and Data Link Layer Optimization of CDMA-Based Networks November 12, 2025 / November 30, 2025 by mrkadmin 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 to determine the optimum outer […] Read more » f zarringhalam f.zarringhalam farhad zarringhalam zarrin ghalam
Articles Throughput-optimal cross-layer resource allocation in DS-CDMA systems with Nakagami multipath fading November 12, 2025 / November 30, 2025 by mrkadmin 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 single cell conventional cellular DS-CDMA […] Read more » f.zarringhalam farhad zarringhalam
