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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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monopulse
14所编写的精密跟踪雷达图书，内容包括概论，雷达跟踪测量基础，单脉冲技术，跟踪雷达测量精度分析，跟踪雷达测量天线技术，接收机技术，距离跟踪技术，角跟踪伺服系统，多普勒测速技术等(The book of precision tracking radar written by 14 institute)
- 2011-05-18 21:10:42下载
- 积分：1
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Chepstow-keying-orthogonality
对不同调频周期数 不同时间带宽积和不同调 频 极 性 等 多 种 组 合 情况下的 信号正交性进行了分析 发现通过不同调制参数的灵活组合可以实现 信号正交调制 (Analysis found that is orthogonal to the signal in the case of the variety of combinations of different FM number of cycles of the different time-bandwidth product and different FM polarity signal quadrature modulation can be achieved by the flexible combination of different modulation parameters)
- 2013-03-02 21:28:53下载
- 积分：1
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an-r18an0033ej0100-tps-1-profinet
说明： 主控mcu与profinet进行SPI通讯的例子程序(An example program of SPI communication between master control MCU and PROFINET)
- 2020-06-23 11:40:02下载
- 积分：1
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FreeSender
FreeSender 群发器，学习socket 编程(FreeSender mass learning socket programming)
- 2013-01-25 16:25:13下载
- 积分：1
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六种数字调制信号的识别
说明： 决策树分类法识别ASK,PSK,FSK六种数字信号的调制识别(Decision tree classification for modulation recognition of ask, PSK and FSK digital signals)
- 2020-03-18 22:10:48下载
- 积分：1
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MIMO MATLAB
仿真MIMO信道容量与信噪比和发收天线数目的关系，(Simulated MIMO Channel Capacity)
- 2021-05-14 04:30:02下载
- 积分：1
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bpf1
带通滤波器matlab源代码
菜鸟看看有用的(band pass filter Matlab source code as they see useful)
- 2007-04-18 10:46:03下载
- 积分：1
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Modbus_COM
modbus_com 通讯功能，包括PLC程序(modbus_com communication project,include PLC program)
- 2011-06-14 20:13:05下载
- 积分：1
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bpsk_awgn
BPSK调制方式AWGN信道的理论误码率、仿真误码率以及瑞利信道下的理论值和仿真误码率(Theoretical BER of BPSK modulation AWGN channel BER simulation and theoretical value of the Rayleigh channel simulation error rate)
- 2021-01-16 21:38:46下载
- 积分：1
