| Co-channel interference (CCI) plays a vital role in the performance of an interference-limited system. With the progressive application of MIMO to the wireless communication systems, the impact of CCI on the performance of the system especially for the cell-edge users has gained much attention recently. As an important MIMO technology, Space-Time Block Coding (STBC) with superior fading-combating ability has been suggested to improve the performance of interference-limited systems. Therefore, the research on the impact of CCI has an important theoretical value for the performance improvement of interference-limited systems. Two major contributions are made in this thesis.1. Under the assumption of pure Rayleigh fading and equal-power interferers, the post-processing signal-to-interference ratio (SIR) expressions for STBC when the number of transmit antennas is 2, 3, 4 and 8 are derived, respectively. Based on the SIR expressions, the closed-form probability density functions (pdf) for arbitrary number of transmit-receive antennas and STBC coding rate are obtained.2. Taking effects of both path-loss and unequal interferers into account, the closed-form pdf of the denominator (corresponding to the interference-signal term) is derived.The validity of the theoretical analyses is verified by Monte-Carlo simulation and the performance of STBC in the interference-limited environment is discussed. |
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