A master thesis from Aalborg University
Impact of channel models in MIMO OFDM for LTE
[Kanalmodellers påvirkning af MIMO OFDM i LTE]
Author(s)
Term
10. term
Publication year
2012
Submitted on
2012-05-31
Pages
71 pages
Abstract
In this report, a study of OFDM receiver algorithms for SISO, SIMO, and MIMO with SMUX and STBC is performed. The algorithms are compared using BER simulations in an uncorrelated Rayleigh fading channel. The system is extended to include Turbo coding and rate matching complying with the LTE standard, reaching a throughput of 11.2~bits/sec/Hz in an i.i.d. 2x2 Rayleigh fading channel. To maximize the advantage from the Turbo codes, a soft decision demodulator for M-PSK and M-QAM modulation constellations is developed. Finally, the attention is brought to channel models with spatial correlation, created from statistics and geometry. A geometrically based channel model is developed and evaluated with respect to the Demmel Condition Number, and a comparison between this and the WINNER~II channel model is performed. Based on the findings in this study, it is concluded that additional antennas add a significant gain in throughput, specifically by obtaining additional diversity from STBC in the low SNR regime and SMUX in the high SNR regime.
Documents
Colophon: This page is part of the AAU Student Projects portal, which is run by Aalborg University. Here, you can find and download publicly available bachelor's theses and master's projects from across the university dating from 2008 onwards. Student projects from before 2008 are available in printed form at Aalborg University Library.
If you have any questions about AAU Student Projects or the research registration, dissemination and analysis at Aalborg University, please feel free to contact the VBN team. You can also find more information in the AAU Student Projects FAQs.