IQ Imbalance Estimation and Compensation Schemes using TFI-OFDM System

概要

論文の詳細を見る
A direct- conversion receiver (DCR)reduces the power consumption and cost. However, DCR in Or-thogonal frequency division multiplex (OFDM)systems suffer from IQ imbalance. Until this time, many algorithms are proposed to compensate IQ imbalance in OFDM. However, the complexity is still considerable work. 0n the other hand, time- frequency interferometry-OFDM (TFI-OFDM)system has been proposed to achieve an accurate channel identification property with small number of pilot symbols. In this paper, we propose a novel IQ imbalance estimation and compensation scheme using TFI-OFDM system. In the proposed system, by using the feature of the TFI pilot symbols, we can identify IQ imbalance without high calculation complexity. Furthermore, by using subcarrier selection, the influence of the noise power can be reduced. From the simulation results, the proposed scheme can achieve the low-complexity IQ imbalance estimation and compensation without a degradation of the BER performance.
一般社団法人電子情報通信学会の論文
2013-03-07