No / Multi-antenna(MIMO) techniques are reported to improve the
performance of radio communication systems in terms of their
capacity and spectral efficiency. In combination with
appropriate receiver technologies they can also provide
savings in the required transmit power with respect to target
bit error rate. Long Term Evolution(LTE), one of the
candidates for fourth generation(4G) mobile communication
systems has MIMO as one of its underlying technologies and
ITU defined channel models for its propagating environment.
This paper undertakes a comprehensive verification of the
performance of transmit diversity MIMO in the downlink
sector of LTE. It uses models built using MATLAB to carry
out simulations. It is deduced that generally increasing
transmit diversity configuration from 2x2 to 4x4 offers SNR
savings in flat fading channels though with a user equipment
moving at 30km/hr, deploying 2x2 offers higher SNR saving
below 7dB. Furthermore bandwidth variation has minimal
effect on the BER performance of transmit MIMO except at
SNR values above 9dB while the gains of higher modulation
schemes come with a transmit power penalty.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/10802 |
| Date | 12 1900 |
| Creators | Uyoata, U.E., Noras, James M. |
| Source Sets | Bradford Scholars |
| Detected Language | English |
| Type | Article, No full-text in the repository |
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