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This paper is an overview of the approaches to modelling coexistence of different wireless systems based on OFDM, particularly in the ISM spectrum. In addition to problem statement and motivation, it lists a general interference model. A simulation of interpolation model is presented.
This paper deals with the transmission of channel state information in the Long Term Evolution FDD — uplink mobile standard (Release 8), with focus on the possibility of aperiodical transmission of this information using Physical Uplink Shared Channel (PUSCH). It is necessary to ensure high quality transmission of feedback information about channel conditions between User Equipment (UE) and the Base...
The Long Term Evolution (LTE) cellular network in uplink has a resource limitation for transmitting uplink signalling information. There is no possibility to transmit Physical Uplink Shared Channel (PUSCH) and Physical Uplink Control Channel (PUCCH) simultaneously in the same subframe. PUCCH is intended for a large number of user equipment and a short Uplink Control Information (UCI) codeword. The...
A Matlab implementation of the MD-GSIR algorithm is presented, including an overview of the algorithm and details of the implementation. The algorithm uses a multidimensional factor graph and iterative message passing to gradually improve the signal estimation and accounts for fading in time, frequency and space dimensions. The implementation is preliminary and its goal is to allow flexible and easy...
We live in an exciting world where technology is evolving extremely fast. Long Term Evolution (LTE) mobile communication networks are designed to bring high speed connection availability to a high number of users and is very successful in achieving such goal. This paper presents results of a practical measurement campaign in a laboratory LTE setup and provides a means of low complexity estimation...
This paper discusses indoor channel modeling for mobile communications. We apply multislope log-distance channel model and simulate indoor path loss distribution. The standard deviation value of normal and log-normal distribution describes various fading effects affecting the signal propagation. We defined the areal signal path loss distribution in a restricted indoor environment. The PSO-based process...
Mobile network technologies have been experiencing great progress. Simulations and analysis of these systems are challenging tasks. Different network simulation and modelling tools have already been developed. However, these simulation and modelling tools are commercial, they are focused on the physical layer simulations or they are simply unavailable. Hence, the own simulation program was created...
Universal mobile telecommunications system (UMTS) is one of the 3rd generation (3G) cell phone technologies. The capacity of UMTS is interference limited. Radio resources management (RRM) functions are therefore used. They are responsible for supplying optimum coverage, ensuring efficient use of physical resources, and providing the maximum planned capacity. This paper deals with admission control...
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