Informatics Publishing Limited

Dhirendra Kumar Tripathi ¹, D. Muralidharan ², S. Sarvanan ³

Affiliations
1 Department of Information and Communication Technology, School of Computing, SASTRA University, Thanjavur, TN 613402, IN
2 Department of Information Technology, School of Computing, SASTRA University ,Thanjavur, TN 613402, IN
3 Department of Information Technology, School of Computing, SASTRA University, Thanjavur, TN 613402, IN

Abstract

In this paper, we present design and field programmable gate array (FPGA) implementation of fractional bit encoded (FBE)–spatial modulation (SM) based transmitter for the multiple-input multiple output (MIMO) system. SM is a novel approach to multiple–input–multiple–output (MIMO) systems which entirely avoids inter–channel interference (ICI) and requires no synchronization between the transmit antennas, while achieving a spatial multiplexing gain. This is performed by mapping a block of information bits into a constellation point in the signal and spatial domains. Fractional bit encoding is modulus conversion scheme which convert the incoming bit stream to numbers in an arithmetic base, or modulus, that is not a power of 2 .When applied to SM, FBE relies on encoding each point in the spatial domain, i.e., the antenna index, with, on average, a non–integer number of bits, while keeping unchanged the encoding process in the signal domain. This results in a more versatile system design allowing transmitter to be equipped with an arbitrary number of antennas for a wider range of spectral efficiencies given restrictions on space and power consumption. It is especially useful for compact mobile devices where cost and space constraints pose fundamental limits on the achievable bit rate. The synthesis results of the implementation of transmitter on FPGA are included in the paper.

Keywords

Fractional Bit Encoding (FBE), Inter Channel Interference (ICI), Multiple Input multiple Output(MIMO) System, Spatial Modulation (SM).

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Thalkari Sanket Shivkumar ¹, P. Vetrivelan ¹, R. Ratheesh ², S. Sarvanan ³, Glenford Mapp ⁴

Affiliations
1 School of Electronics Engineering, VIT University, Chennai – 600127, Tamil Nadu, IN
2 School of Electronics Engineering, VIT University, Chennai – 600127, Tamil Nadu
3 RF Planning, Bharti Airtel Ltd, Chennai - 600028, Tamil Nadu, IN
4 Middlesex University, London, NW4 4BT, United Kingdom

Abstract

Capacity planning of 3G network unlike 2G is cumbersome. The 3G capacity is multi-fold. It depends on Power Utilization, Code Utilization, Iub (interface between the Radio Network Controller (RNC) and the Node B) and Channel Element (CE). The location of Node B plays a crucial role in 3G Planning. The Radio Frequency planner needs to select the best optimal location for setting up the 3G site in order to a seamless coverage to the customers. In this paper, these topics are explored in a detail manner. For this planning the Node B layout for Airtel in the densely populated Santhome area of Chennai is discussed. The basis issue is the interdependence between coverage and capacity in 3G. In 3G systems, both capacity and quality should be monitored to ensure the best network performance. Planning of new base station has been first treated with an analytical study of the cell coverage range for a specific environment and service. The accomplished results have been checked using ASSET simulation tool and Geographical Information System (GIS) tool.

Keywords

ASSET, Capacity. Coverage Prediction, Pilot Pollution, 3G

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