Achieving High Data Rates with Diversity Techniques in LTE
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 7
Abstract
Orthogonal Frequency Division Multiple Access (OFDMA) is a technology for higher date rates in next generation of wireless communication standards. Efficient diversity in frequency selective channels improves data rates in LTE. LTE is a part of 3GPP and it evolved from the UMTS technology. User channelization is used to enhance the diversity techniques in time varying channels. Existing schemes provide efficient diversity based on subcarrier locations. They capture diversities technique based on resource structure. The existing methods are implemented for one type of diversity and not considering the time variations in the transmission frame. In proposed scheme, time variations of the frame are taken into considerations. The diversity depends upon the transmission scheme used in scenario. Diversity scheme varies among the mobile speeds. For moderate speed (30km/hr to 100km/hr) mixed type scheme are used for the higher data rates. BER and outage probability performance are compared for the 4 Tap channel. Simulations are done under the LTE parameters and the performances of the mixed type with other diversity schemes are compared.
Authors and Affiliations
Karthika S
Keywords
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