In an optimal power control scheme for a Code Division Multiple Access (CDMA) system all mobile stations signals should arrive to the base station at equal power. If not, stronger singals may cause Continue reading
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Tag: CDMA
Towards efficient legacy test evaluations at Ericsson AB, Linköping (Computer Project)
3Gsim is a load generator for traffic simulation in a WCDMA (Wideband Code Division Multiple Access) network. It is developed at Ericsson AB in Linköping. Tests are run daily and the results are Continue reading
Cross-layer Optimization Protocols in Ad-hoc Networks: Analysis and Practical Implementation of Transport and Network Layers (Electronics Project)
Ad-hoc wireless networks use multi-hop transmissions to communicate, without exploiting any infrastructure. Logical links create unreliable connections between nodes: the capacity of the channel can unpredictably change due to the Continue reading
Wireless Network Cocast: Cooperative Communications with Space-Time Network Coding (ECE/EEE Project)
Traditional cooperative communications can greatly improve communication performance. However, transmissions from multiple relay nodes are challenging in practice. Single transmissions using time-division multiple access cause large transmission delay, but simultaneous transmissions from two or more nodes using frequency-division multiple access (FDMA), code-division multiple access (CDMA), or Continue reading
Energy Optimization Mechanism for Mobile Terminals using Vertical Handoff between WLAN and CDMA2000 Networks (Electronics Project)
This paper presents energy optimization mechanism for mobile terminals (MTs) using vertical handoff between Wireless LAN (WLAN) and CDMA2000 networks. Several techniques for optimizing the power consumption of MTs have been Continue reading
DS-CDMA and MC-CDMA with Per-User MMSE Frequency Domain Equalization (Electronics Project)
The future wireless mobile communication systems will be required to support high-speed transmission rate. Direct sequence code-division multiple access (DS-CDMA) and Continue reading
Coexistence of Real Time and Best Effort Services in Enhanced Uplink WCDMA (Electronics Project)
The increasing use of data services and the importance of IP basedservices in third generation mobile communication system (3G), requires the transmission from the cell phone to the base station, i.e. uplink, to manage high speed data rates. In the air interface for Continue reading
Simulation of a CDMA System Based on Optical Orthogonal Codes (Electronics Project)
ABSTRACT
To take advantage of the high speed in an optic fiber, one of the basic concept in fiber optic communication is to allow several users to simultaneously transmit data over the channel. One technique that provides multiple access is it fiber optic-code Continue reading
An Evolutionary Approach to Designing Complex Spreading Codes for DS-CDMA (IEEE Paper)
This paper proposes a novel evolutionary approach to spreading code design in direct sequence code division multiple access (DS-CDMA). Specifically, a multiobjective evolutionary algorithm (EA) is used to generate Continue reading