| Summary: | 碩士 === 國立中興大學 === 電機工程學系所 === 96 === Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is currently one of the important wireless communication. In the transmitting process of wireless communication, there will be signal frequency offset due to channel noise and other factors. Therefore, carrier frequence offset compensation is crucial.
The basic architecture of 802.11a is chosen to demonstrate MIMO. Our goal is to enhance 4 times data rate so as to enhance information data rate. After the completion of carrier frequency offset, compensation for SISO system, it will be extended to 4×4 MIMO systems. It can be accomplished without using 4 sets of complicated CFO systems. We adopt the low complexity synchronization circuit for the receiver. We use the signals of one antenna to analyze its compensation, which will be sent to another three antennas for compensation. Finally, simulation results prove that using low complexity CFO system can be compensation under modest frequency offset circumstances. Finally, a low complexity CFO system is successfully designed.
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