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two_ray_model
Modelo de dos rayos de Andrea Goldsmith (figura 2.5, según expresión
2.12)
f = 0.9 frecuencia en GHz
landa = 0.3/f en m
R = -1 coeficiente de reflexión en tierra
ht = 10 altura del transmisor en m
hr = 2 altura del receptor en m
Gt = 1
Gr = 1
Pt = 1
d=10:.1:100000
phase_diff = 4*pi*ht*hr./(landa*d) aproximación
Pr = Pt*((landa/(4*pi))^2)*((abs((sqrt(Gt)./d) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff)))./d)).^2)
Pr = Pt*((landa/(4*pi))^2)*(1./d).*((abs((sqrt(Gt)) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff))))).^2)
figure(1), clf,
plot((d),10*log10(Pr/max(abs(Pr))))
grid
xlabel( log_1_0(d) )
ylabel( Potencia recibida (dBm) )
- 2010-02-08 06:31:54下载
- 积分：1
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matlab--shi-yong-shi-li
MATLAB程序实例，学习编程语言的必需的！！有兴趣的可以查看，下载(MATLAB instance, to learn a programming language necessary! ! Interested parties can view, download)
- 2012-05-19 18:46:06下载
- 积分：1
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LDPC2
。并行级联LDPC码是由多个码率不同的子码，经并行级联后得到的码率可变的LDPC码。本文提出了基于
并行级联LDPC码的递增冗余HARQ方案，给出了这种方案的吞吐量性能封闭解。在AwGN信道和Rayleigh衰落信
道下，通过仿真将新方案的性能和随机LDPC码的性能进行了比较。结果显示，并行级联LDPC码的递增冗余HARQ
方案性能接近随机LDPc码，但编、译码更简单，参数选择范围更广。(. Parallel Concatenated LDPC code is different by a plurality of bit-rate sub-code, the LDPC code rate is variable obtained after parallel concatenation. In this paper, the incremental redundancy HARQ scheme based on parallel concatenated LDPC codes, the throughput performance of this program is given closed-form solution. In AwGN channel and Rayleigh fading channels through simulation, the performance of the performance of the new program and random LDPC codes are compared. The results show that the parallel concatenated LDPC codes incremental redundancy HARQ scheme performance close to the random LDPc code, but compiled more simple decoding a wider range of parameter selection.)
- 2013-04-10 21:16:57下载
- 积分：1
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music_8ula
利用MUSIC算法对空间来波方向进行估计，并且结合空间平滑技术实现对空间相干源的DOA估计(MUSIC algorithm for use of space DOA estimation, and combined with spatial smoothing technique for spatial coherence source implementation of the DOA estimates)
- 2009-04-08 15:08:50下载
- 积分：1
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Watermarking_RaviLakkundi
It is used for water marking. Help in Digital Image processing.
- 2011-06-29 18:14:13下载
- 积分：1
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rocket
实现火箭的垂直发射，并在重力作用下实现转弯。(Achieve vertical launch rocket and turn under the influence of gravity.)
- 2013-09-30 10:43:25下载
- 积分：1
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Project-code
德国博世公司开发的发动机启停控制逻辑文档，值得学习(the control logic of engine star&stop developed by bosch)
- 2015-01-19 14:36:17下载
- 积分：1
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SLAM_session4
SLAM 地图构建与定位算法 其中含有卡尔曼滤波和粒子滤波器的程序(the principal of pso)
- 2013-04-21 21:34:34下载
- 积分：1
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matlab_dystem_in
说明： 二阶系统的最小二乘一次完成算法辨识程序，图形的横坐标是采样时刻i, 纵坐标是输出观测值z, 图形格式为连续曲线(second-order system of least-squares algorithm for a complete identification procedures, graphics abscissa is the sampling time i, longitudinal coordinates of the output value of observation z, graphical format for continuous curve)
- 2005-11-05 11:24:53下载
- 积分：1
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Nhan_dang_tieng_noi_-_Mo_phong_bang_Matlab
use neuerl networl for systems mathlab
- 2012-05-13 23:40:03下载
- 积分：1
