sd模型

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：  读串口数据并存入指定excel文件，可调巡检次数，巡检时间间隔(Reading serial data and paid into the excel document, adjustable inspection frequency, inspection time interval)

说明：  在LabVIEW中Modbus应用编程实例(Modbus library usage)

手机RSS阅读器(html5)，应用程序编程源码，很好的参考资料。(Mobile phone RSS reader (HTML5), application programming source code, a good reference.)

重点研究了全数字QAM接收机中的两个关键技术——符号同步和信道盲均衡。研究Gardner定时误差检测算法，盲均衡方面，重点研究了CMA及其改进算法，采用MMA算法和DD-LMS算法联合均衡 (Focuses on the all-digital QAM receiver in the two key technologies- the symbol synchronization and channel blind equalization. Research Gardner timing error detection algorithm, blind equalization, the focus of the CMA and its improved algorithm, using the MMA algorithm and the DD-LMS algorithm for joint equalization)

水声声线仿真，基于射线模型。文章包含仿真条件和说明。文章附件为程序。(Underwater acoustic line simulation, based on the ray model. The article contains simulation conditions and instructions. The article appendix is the procedure.)

java源码,主页制作百宝箱,收集了几十多种主页制作常用的JAVA和javascript特效(Java source code, homepage making kit, collected dozens of various homepage making commonly used Java and javascript effects)

VISUALB BASIC 制作安装程序 ，更明白，更好用(Setup VISUALB BASIC produced a better understanding and better use)

ldpc verilog code has been descripted in this program

word文档对球形译码的理论原理和仿真结果进行了分析 1.sphereandML是主程序，性能接近最大似然ML检测，调用了spheredecode和spheredecodeinf两个子程序； 2.main_spheretoML是主程序，性能达到最大似然NL检测，调用了spheredecodetoML和spheredecodeinftoML两个子程序。(word document on the theory of spherical decoding theory and simulation results are analyzed 1.sphereandML are the main program, performance close to the maximum likelihood ML detection, call the spheredecode and two spheredecodeinf subprogram 2.main_spheretoML are the main program, to achieve maximum performance Ran Detect NL, call a subroutine spheredecodetoML and two spheredecodeinftoML.)