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rayleighnew
瑞利衰落信道，是一种无线电信号传播环境的统计模型。这种模型假设信号通过无线信道之后，其信号幅度是随机的，即“衰落”，并且其包络服从瑞利分布。这一信道模型能够描述由电离层和对流层反射的短波信道，以及建筑物密集的城市环境。(Rayleigh fading channels, the statistical model of a radio signal propagation environment. This model assumes that after the signal through the radio channel, the signal amplitude is random, ie, the " fading" and the envelope of the Rayleigh distribution. This channel model is able to describe the HF channel reflected by the ionosphere and troposphere, as well as building a dense urban environment.)
- 2012-12-02 14:39:21下载
- 积分：1
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plot_hot_map
用不同颜色散点直观描述信号在星座图上概率分布，(Describe the distribution and probability of signals with different colors in the constellation diagram,)
- 2017-07-21 10:07:06下载
- 积分：1
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HniqueForPAPRReductionOfCodedOFDMSignal
改进的SLM算法，用于降低OFDM系统的峰值平均功率比(Improved algorithms for OFDM system to reduce the peak-to-average power ratio)
- 2007-06-03 15:47:40下载
- 积分：1
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bandnew
a crawler for information of metal bands on "http://www.metal-archives.com/"
- 2012-12-25 10:24:41下载
- 积分：1
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DemoProjectOnF28027
本设计以TMS320F28027 DSP为主控制器，以产生占空比可调的PWM波，并采用PID控制调节直流电机的转速，用H桥作为功率驱动电路，使其在给定不同的转速时，电机能跟上转速要求。在电路板中，设置四个按键，来实现电机的启动、停止、正转、反转、加速以及减速的功能。同时，外接虚拟示波器，以显示电机当前的设定转速、实际转速以及电枢电流大小。(The design to TMS320F28027 DSP-based controller to generate a PWM duty cycle adjustable, and the use of PID control to adjust the DC motor speed, with H-bridge as the power drive circuit, so that given a different speed, the motor Can keep up with speed requirements. In the circuit board, set four buttons to achieve the motor start, stop, forward, reverse, acceleration and deceleration functions. At the same time, an external virtual oscilloscope to display the motor current set speed, the actual speed and armature current size.)
- 2018-01-05 21:06:57下载
- 积分：1
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一种数字中频 GPS 信号生成方法 GPS generation
研究了一种数字中频 GPS 信号生成方法。给出了数字中频信号数学模型，模型考虑了各种因素对信号的影响。通过导航电文分析，提出信号传播时延、多普勒频移以及信号入射方向的估计方法。给出了中频信号产生的流程，对其中时延的设置，信号的上变频、信号幅度设置以及方向信息的导入进行了阐述。对所生成的信号模型进行了仿真分析，给出了信号产生各个阶段的频谱，对所生成的信号进行了相关捕获。仿真结果表明频谱特征符合理论分析，能够被捕获并找出信号时延从而实现定位。证明该信号模型能作为信号源应用于 GPS接收机研制中。(】The paper discusses a digital IF GPS signal generation method, gives the mathematic
model of digital IF signal. This mathematic model takes into account the influence of various
factors. Based on analysis of the navigation data, the method to estimate signal propagation time,
Doppler frequency shift and the coming angle of signal is proposed. The flow to generate IF signal
is given, in which the setting of time delay, the up-frequency conversion, the setting of signal
magnitude and the introduction of direction information are expounded. The signal generation model
is simulated and analyzed, the spectrum of signal in each stage given, and the correlation capture
of the generated signal also done. Simulation indicates that the spectrum is in accord with
theoretical analysis the signal could be captured, thus find the time delay, accomplish the
orientation. The signal model is proved applicable in the research and development of GPS receiver.)
- 2013-05-15 11:44:16下载
- 积分：1
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jackagetransform
该压缩包实现二维的DCT变换和逆DCT变换,可以对图像做DCT变换(The package to achieve two-dimensional DCT transform and inverse DCT transform, can make the DCT transform in the image)
- 2017-05-18 19:38:36下载
- 积分：1
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PRN_GEN
GPS PRN产生器,输入卫星号,输出GPS PRN序列.(GPS PRN generator, the importation of satellite, GPS PRN output sequence.)
- 2007-06-29 01:30:12下载
- 积分：1
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test
DSP 28377S例程，用于测试，单核新建工程demo(DSP 28377S routine for testing, single core new project demo)
- 2020-11-04 10:19:52下载
- 积分：1
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ALL
用2407实现的通过电位器改变占空比，从而调节电机转速，并带有捕捉显示占空比(Implemented with the 2407 change in the duty cycle through the potentiometer to regulate motor speed and duty cycle with the capture display)
- 2009-09-17 12:39:33下载
- 积分：1
