| Summary: | 碩士 === 國立交通大學 === 電信工程系所 === 95 === A space-frequency coded multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system on frequency-selective fading channel is considered.
By exploiting the central limit theory that the random variables can approach Gaussian distribution, which is used when the number of random variables is large enough, we will analyze the pairwise error probability of space-frequency codes and provide the corresponding design criteria, which mean rank criterion and distance criterion.
According to the channel variation speed, rapid fading channel and quasi-static fading channel are distinguished, the individual design criteria are also presented.
From the code design of these case, it is deduced that the code construction of space-frequency codes is similar to the code construction of space-time codes by applying the central limit theory.
The simulation results are presented to compare the various trellis code designed from various criteria in the channel environments.
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