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针对MIMO-OFDM系统中期望最大化(EM)信道估计算法在高信噪比(SNR)下带来的误差地板(EF)现象,且OFDM符号的数据传输效率随发射天线数的增加而明显降低,提出一种改进的高效EM信道估计算法。该算法首先引入一种准确的等效信号模型并推导出一种修正的EM算法,改善了EM算法在高SNR下的性能 在多个OFDM间利用相位正交导频序列来提高数据传输效率,同时进行联合信道估计以提高估计性能。仿真实验验证了所提算法具有更高的信道估计性能和更高的数据传输效率。(For multiple-input multiple-output with orthogonal frequency division multiplexing(MIMO-OFDM) systems,the error floor(EF) phenomenon at high signal noise rate(SNR) was induced by the expectation maximum(EM) channel estimation algorithm.In addition,the data transmission efficiency was declined obviously with the increasing number of transmit antennas.According to these problems,an improved and efficient EM channel estimation algorithm was pro-posed.Firstly,an accurate and equivalent signal model was introduc...)
- 2011-09-05 15:20:54下载
- 积分：1
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Programación Universitaria
hbhkj ghghjg jhkjg khh
- 2018-02-01 19:09:39下载
- 积分：1
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1572-Introduction-to-Using-OPNET-Modeler-Network-
Slide for beginning with OPNET
- 2013-03-12 11:50:15下载
- 积分：1
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8PSK for ML
说明： 这是一个基于OPtisystem下的对于8PSK信号的仿真，可用于通信工程作业的一般仿真系统。(This is a simulation system of 8PSK signal based on OPtisystem, which can be used in general simulation system of communication engineering operation)
- 2019-04-17 16:17:28下载
- 积分：1
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MUD
CDMA以及MC-CDMA中的多用户联合检测
MMSE算法以及ZF(迫零)算法(CDMA and MC-CDMA in multi-user MMSE joint detection algorithm, as well as ZF (zero forcing) algorithm)
- 2020-11-18 16:19:40下载
- 积分：1
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高斯信道
说明： 高斯信道下的误码率与瑞利衰落与高斯信道下的误码率的比较分析(Comparison of Bit Error Rate in Gaussian Channel and Rayleigh Fading and Bit Error Rate in Gaussian Channel)
- 2019-06-15 19:30:24下载
- 积分：1
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Channel estimation LS MMSE
实现ls信道估计，计算误码率计算，均方误差，对比MMSE和ls两种算法(ls estimation ababababababbababababaa)
- 2018-11-13 09:35:35下载
- 积分：1
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ShortMessageSystem
短信群发系统，在一些业务范围广泛的公司中，当公司有了新的通知要告诉在外地的员工，通常使用拨打电话的方式，这样虽然能把事情说清楚，但是当在外的员工比较多时，工作量很大，为了解决这个问题，可以开发一个企业短信群发管理系统。企业短信群发管理系统主要利用硬件短信猫发送短信，并且可以查看SIM卡中收到的短信。(Mass messaging system, in a number of business a wide range of companies, when the company has a new notification to tell the staff in the field, normally used by calling the way, so although things can make it clear, but when the staff out for a long time compared , the heavy workload, in order to resolve this problem, can develop an enterprise management system for mass text messaging. Short Message management system for enterprises mainly use the hardware to send SMS text messages a cat and can view the SIM card text messages received.)
- 2009-07-16 13:00:21下载
- 积分：1
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TI-RTOS开发教程
TI RTOS 教材，难得好资料，基于TI RTOS软件开发人员的必备参考(TI RTOS handbook, show how to use TI RTOS)
- 2020-07-01 16:20:02下载
- 积分：1
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R_95302909IEC103-NR
iec103 规约上位机源代码，喜欢的就下吧。(iec103 Statute of the host computer source code, like on the next bar.)
- 2021-04-22 10:58:49下载
- 积分：1
