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METHOD FOR CALCULATING CFO AND I/Q IMBALANCE COMPENSATION COEFFICIENTS, COMPENSATION METHOD USING THE SAME, AND METHOD FOR TRANSMITTING PILOT SIGNAL
METHOD FOR CALCULATING CFO AND I/Q IMBALANCE COMPENSATION COEFFICIENTS, COMPENSATION METHOD USING THE SAME, AND METHOD FOR TRANSMITTING PILOT SIGNAL
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机译:计算CFO和I / Q不平衡补偿系数的方法,使用相同补偿方法的补偿方法以及发送导频信号的方法
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摘要
The OFDM scheme based communication system is currently being put into practical use because of its effective use of frequencies and its enhanced resistance to multipath. However, since the OFDM scheme treats multiplexed signals with overlapped spectra, the orthogonality between carriers are corrupted and the error rate characteristic is degraded in the presence of CFO. Furthermore, since locally oscillated signals different by a phase of π/2 are difficult to obtain in demodulating the I/Q signal, an imbalance is caused between the I/Q signals, resulting in degradation in the error rate characteristic. The invention suggests a novel pilot signal, and a method for analytically determining compensation values for CFO and I/Q imbalance and compensating for those distortions using the resulting values. Furthermore, the invention is applicable not only to the OFDM scheme but also to any protocol that involves pilot signals.
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