寬頻通訊系統中實虛部非協調、載波頻率位移、相位雜訊與通道響應之同估測

Joint Estimation of I/Q Imbalance, Carrier Frequency offset, Phase Noise, and Channel Response for Broadband Communication Systems

吳凱迪(Kai-Di Wu)

指導教授 ： 馮世邁

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.01261

摘要

無資料

關鍵字

實虛部非協調 ； 載波頻率位移 ； 相位雜訊 ； 通道響應

並列摘要

Nowadays, direct-conversion radio frequency (RF) receivers become more appealing. However, orthogonal frequency division multiplexing (OFDM) systems with direct-conversion RF receivers are very sensitive to non-idealities at the front-end of receiver, such as I/Q imbalance, carrier frequency offset (CFO), and phase noise (PHN). These non-idealities at the receiver result in inter-carrier interference (ICI). Accurate estimates of the non-idealities and channel response are required in OFDM systems. In this thesis, the effects of I/Q imbalance, CFO, and PHN on OFDM systems are studied, and the estimation of these parameters is considered. To solve the problems, we propose a time domain method for joint estimation of I/Q imbalance, CFO, and PHN as well as channel response. The proposed method requires only one OFDM training block as a preamble to accomplish joint estimation. Moreover, we do not put any restrictions on the preamble signal and thus the proposed method can be adopted in any communication systems with a preamble. It is shown by simulation results that our proposed method performs well for any channels as long as their order is not longer than cyclic prefix (CP).

並列關鍵字

I/Q Imbalance ； Carrier Frequency Offset ； Phase Noise ； Channel Response

參考文獻

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