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05441004
Multiple input multiple output techniques combined
with orthogonal frequency division multiplexing (MIMO-OFDM)
provide a promising approach for wireless systems. However, a
serious drawback of the OFDM system is the high peak-toaverage
power ratio (PAPR), which may severely affect the
power efficiency of RF power amplifiers. In this paper, we
propose a simple method to reduce the PAPR of MIMO-OFDM
signals based on the use of unused subcarriers. Instead of
processing the signals at each transmitter separately, a peak
cancelling signal is generated at one antenna and is then applied
to all the others with only simple modifications. Simulation has
shown that a minimum 2 dB reduction in PAPR can be achieved
for all transmit signals using this approach. As the signal
processing is nearly all done at a single transmitter, repetition of
the operations at each transmitter is avoided, and therefore the
overall cost of the system can be significantly reduced.
- 2011-11-05 01:46:42下载
- 积分：1
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VB_UART
串口程序，用于通过串口控制空调，可以在这个程序基础上修改其他代码(used for serial port)
- 2013-07-18 14:33:06下载
- 积分：1
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wlan_process
针对胖AP和瘦AP，描述WLAN通信的过程(It describes the process of AP based on Wlan)
- 2012-05-29 18:12:38下载
- 积分：1
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4
说明： 4. 试说明卷积编解码的工作原理：
(1) 使用Simulink仿真卷积编码，并用Viterbi译码的方法进行解码，其中的编码、译码全部是自己编写代码(S-Function方式)，不是调用Simulink的已有编码、译码函数。
(2) 请在加性白高斯噪声信道中，画出比特信噪比与误码率的关系曲线。(4. Try to explain the working principle of convolutional codec:
(1) Simulink was used to simulate convolutional coding, and Viterbi decoding method was used for decoding. The coding and decoding were all written by oneself (s-function method), rather than calling the existing coding and decoding functions of Simulink.
(2) in the additive white gaussian noise channel, please draw the curve of the relationship between bit signal-to-noise ratio and bit error rate.)
- 2019-01-15 10:53:20下载
- 积分：1
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ex516
gardner位同步算法，实现数字通信系统中位同步(gardner bit synchronization algorithm to achieve bit synchronization in a digital communication system)
- 2017-04-13 19:53:32下载
- 积分：1
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DSCDMA
直扩CDMA系统仿真程序，信道包括加性白高斯噪声，复合加性白高斯噪声，瑞利衰落，频率选择性瑞利衰落，双信道瑞利衰落。(DS CDMA system simulation program, the channel including the additive white Gaussian noise, complex additive white Gaussian noise, Rayleigh fading, frequency selective Rayleigh fading, dual-channel Rayleigh fading.)
- 2021-04-05 21:29:03下载
- 积分：1
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CommunicationSystem
使用QPSK调制方式的简单的通信系统，包含载波同步位同步等模块(a simple communication system, using QPSK modulation, including bit synchronization and carrier synchronization)
- 2012-01-31 11:09:27下载
- 积分：1
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bianyiyuanli
编译原理的学习资料，我们上课用的，没有源码传，但又想下载东西，只好传了学习资料(Compilation Principle of learning materials, we used in class, there is no source Chuan, but want to download things, but to learn from the information passed)
- 2009-01-01 18:45:00下载
- 积分：1
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BlimpDuino_beta1.1.1
Blimpduino is a very low cost open source autonomous blimp. It consists of an Arduino-based blimp controller board with on-board infrared and ultrasonic sensors and an interface for an optional RC mode, a simple gondola with two vectoring (tilting) differential thrusters, and ground-based infrared beacon. It will be available as a commercial kit, complete with a mylar envelope, in late 2008.
- 2009-09-21 23:30:30下载
- 积分：1
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基于Matlab加噪语音的FIR滤波器设计_申艳
说明： 数字信号处理，设计数字滤波器，利用MATLAB语言仿真实现(Digital Signal Processing, Design of Digital Filter and Realization by MATLAB Simulation)
- 2019-04-12 20:51:10下载
- 积分：1
