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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.

说明：  语音处理 改变声速变速不变调 改变声调不变速(Speech Processing Variable Speed Modification)

说明：  有关信道估计和信道均衡的仿真程序，希望会有所帮助(Related to channel estimation and channel equalization of the simulation program, hoping it would be helpful)

这是一个C语言实现的一阶到六阶的IIR滤波器程序,用于TI TMS320C5416 Texas 工具(This is a C-language-implemented first-to-sixth-order IIR filter program for the TI TMS320C5416 Texas tool)

利用MATLAB实现多用户的扩频通信的发送和接受，程序可以直接跑，不需要改动！(The use of MATLAB implementation of multi-user spread spectrum communication send and receive, the program can be directly run, no changes!)

无线传感器网络leach协议的matlab仿真程序(Wireless sensor networks matlab simulation program)

Based on SVPWM three-level inverter matlab simulation, Contains two clients receive link-level communications program, ICA (Principal Component Analysis) algorithm and procedures.

异步socket通信C++，对socket基础协议进行封装处理(Asynchronous socket communication C++, on the basis of protocol encapsulation process socket)

关于GSM中同频干扰和邻频干扰的分析，和matlab仿真实现，有图(About the GSM co-channel interference and adjacent channel interference analysis, and matlab simulation, a map)

基于BD-SVD分解的下行CoMP预编码算法仿真(Based on the BD-SVD decomposition of the downlink the CoMP pre-coding algorithm simulation)