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调制仿真

于 2020-10-26 发布

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下载积分: 1 下载次数: 3

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代码说明：

说明：基带信号QPSK和16QAM的调制仿真，绘制误码率和误符号率的曲线(Base band signal QPSK and 16QAM modulation simulation, drawing error rate and error symbol rate curve.)

文件列表：

cal_QAM16err.m, 381 , 2020-10-14
IQtrans.m, 131 , 2020-10-11
main.m, 4308 , 2020-10-14
QAM16.m, 204 , 2020-10-13
QAM16_demod.m, 839 , 2020-10-13
QPSK.m, 236 , 2020-10-13
QPSK_demod.m, 244 , 2020-10-13
voltage_trans.m, 345 , 2020-10-13

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2012-07-14 11:40:35下载

积分：1
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Abstract—In this paper, we study the joint estimation of inphase and quadrature-phase (I/Q) imbalance, carrier frequency offset (CFO), and channel response for multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) systems using training sequences. A new concept called channel residual energy (CRE) is introduced. We show that by minimizing the CRE, we can jointly estimate the I/Q imbalance and CFO without knowing the channel response. The proposed method needs only one OFDM block for training and the training symbols can be arbitrary. Moreover when the training block consists of two repeated sequences, a low complexity two-step approach is proposed to solve the joint estimation problem. Simulation results show that the mean-squared error (MSE) of the proposed method is close to the Cramer-Rao bound (CRB). Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel estimation.

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积分：1

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调制仿真

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