Orthogonal frequency division multiplexing (OFDM) is the major technique
for next generation wireless communication system because of its high spectral
efficiency. In addition, multiple-input multiple-output (MIMO) technique is
usually used to further increase system capacity. There are two major coding
schemes adopted in MIMO-OFDM systems, i.e. space-time block code (STBC) and
space-frequency block code (SFBC). This thesis investigates the
orthogonal-space-frequency block code OFDM (OSFBC-OFDM) system.
In SFBC-OFDM systems, the channel frequency response is usually assumed
to be the same for adjacent subcarriers. However, this assumption is not valid in
frequency-selective fading environment. Therefore, the orthogonality of code
structure is destroyed, leading to substantial increase in interference and
significant decrease in system performance.
This thesis proposes a receiver equalizer which adopts an interference
cancellation (IC) mechanism to maximize the signal to interference plus noise ratio
(SINR). Both the Lagrange multiplier method and eigenvalue method are adopted
in the interference cancellation. Simulation experiments are conducted to verify
the system performance and results demonstrate that the SINR performance is
dramatically improved.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0804110-210902 |
| Date | 04 August 2010 |
| Creators | Wei, Shih-ping |
| Contributors | Yu-Te Su, Chih-Peng Li, Chin-Liang Wang, Ding-Bing Lin, Char-Dir Chung |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804110-210902 |
| Rights | not_available, Copyright information available at source archive |
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