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Kilaru, Seetaiah
- Review and Analysis of Macrocell Coverage Expansion Technologies
Authors
1 Institute of Aeronautical Engineering, Hyderabad, Telangana-500043, IN
2 Swarna Bharathi Institute of Technology & Sciences, Khammam affiliated to JNTUH, IN
Source
Wireless Communication, Vol 7, No 10 (2015), Pagination: 334-337Abstract
The cellular traffic is increasing from time to time since beginning of 20th century. The existed cellular system in India was mostly Homogeneous. Handling future traffic with existed architecture is quite a challenging task. Replacement of current system and re-designing will involve huge capital. Network providers also don’t want to replace existed architecture. The current cellular architecture efficiency is poor with respect to the area of cell edge. This paper will discuss about possible emerging methodologies to expand the cell coverage. This extension is possible with heterogeneous networks. Deployment of Femto, relay and other devices within one macro cell will convert existed homogeneous environment to heterogeneous. This paper discussed about some useful deployment technologies which can increase spectral efficiency, coverage probability and provide effective traffic management at the edge of cell.
Keywords
Cell Coverage, Spectral Efficiency, Femto Cell, Relay, Device to Device Communication.
- A Critical Review on the Implementation of MIMO with CSIT and CSIR
Authors
1 Electronics & Communication Engineering in Institute of Aeronautical Engineering, Hyderabad, Telangana - 500043, IN
2 Electronics & Communication Engineering in Institute of Aeronautical Engineering, Hyderabad - 500043, IN
3 Electronics and Communications Engineering, Institute of Aeronautical Engineering, Hyderabad - 500043, IN
Source
Wireless Communication, Vol 8, No 1 (2016), Pagination: 53-57Abstract
Advanced wireless networks need high throughput to serve various multimedia applications. This requirement of high throughput is achievable if the transmitter has up to date information about channel quality of the receiver. This up to date information about channel quality should send to the Base Station (BS) by Mobile Station (MS). To enhance the channel transmission, Multiple Input Multiple Output (MIMO) technology is introduced. This transmission technique is best useful for 4G wireless networks. This paper will give detailed outlook on the implementation of MIMO with the known Channel state Information at the Transmitter and Receiver. The conventional method of MIMO with CSIT is not sufficient to serve for advanced multimedia applications. Hence, there is strong need to implement MIMO with CSIT and CSIR.Keywords
MIMO, CSIT, CSIR, Multimedia Services.- Mathematical Analysis of Interference Issues and Study of Path Loss, Fading and Shadowing Effects on Cognitive Radio Networks
Authors
1 Tirumala Engineering College, Narasaraopeta, Andhra Pradesh, IN
Source
Wireless Communication, Vol 7, No 8 (2015), Pagination: 251-255Abstract
Handling interference in wireless communication system is a challenging task. This paper aims about mathematical analysis of interference in general and also in cognitive radio networks. This paper concentrates on various sources of interferences such as path loss, fading and shadowing. Interference system model was created by considering spatial distribution of nodes, wave propagation characteristics and mobility of the interferers. Interference from active set of nodes and aggregate interference was analysed mathematically. Finally, interference in cognitive radio network was analysed under different circumstances. Simulation results showed that the outage probability of secondary user to sense the transmission between primary transmitter and receiver with respect to path loss, fading and shadowing.