Paper Info
Title
Two-dimensional spreading scheme employing 2D orthogonal variable spreading factor codes for orthogonal frequency and code division multiplexing systems
Abstract
Future 4G systems require transmission of richer multimedia services which inevitably implies an increase in data rate. Orthogonal frequency and code division multiplexing (OFCDM) technique has shown promising results in achieving a high data rate while simultaneously combating multipath fading. OFCDM is an amalgamation of orthogonal frequency division multiplexing and two-dimensional (2D) spreading. 2D spreading helps to achieve diversity gains in both time and frequency domains. The present OFCDM systems employ 1D orthogonal variable spreading factor (OVSF) codes to achieve the required 2D spreading in code multiplexed channels. However, 2D OVSF codes have better correlation properties in comparison to 1D OVSF codes. Motivated by this principle, the authors propose a spreading scheme for OFCDM systems using 2D OVSF codes. The spreading scheme is designed to increase the system throughput and reduce multi-code interference. Here, the authors study the OFCDM system performance using the proposed spreading scheme in a multipath fast fading channel with varying spreading factors in both time and frequency domains. The results are compared with the existing OFCDM systems using 1D OVSF codes.
Year
DOI
Venue
2013
10.1049/iet-com.2012.0197
IET Communications
Keywords
Field
DocType
two-dimensional orthogonal variable spreading factor codes,multicode interference reduction,ofcdm technique,code multiplexed channels,1d orthogonal variable spreading factor codes,two-dimensional spreading scheme,2d ovsf codes,orthogonal codes,fading channels,frequency domains,ofdm modulation,multipath fast fading channel,channel coding,multipath channels,multimedia services,time domains,orthogonal frequency and code division multiplexing systems,1d ovsf codes,interference suppression,4g mobile communication,4g systems,time-frequency analysis,time frequency analysis
Multipath propagation,Fading,Communication channel,Computer network,Interference (wave propagation),Throughput,Multiplexing,Code division multiple access,Mathematics,Orthogonal frequency-division multiplexing
Journal
Volume
Issue
ISSN
7
5
1751-8628
Citations 
PageRank 
References 
0
0.34
6
Authors
2
Name
Order
Citations
PageRank
Parul Puri1154.13
Neetu Singh2109.56