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莱斯信道的仿真与建模,包含突发干扰的仿真,应用于手机信号与基站的通信。-Rice channel simulation and modeling, including simulation of burst interference, used in mobile phones and base station communication signal.
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用MATLAB仿真瑞利信道下的BPSK系统的误码率 和信噪比的关系曲线。-Using MATLAB simulation under Rayleigh channel BER BPSK system and the relationship between the curves of signal to noise ratio.
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设计一个有干扰的直接序列扩频通信系统, PN码由m序列产生器产生,经过高斯白噪声信道。在接收端接收到的信号包括“有用信号+高斯白噪声+干扰”,将接收信号进行解扩,判决,得到用户的信号检测结果,绘制不同的扩频增益(增益值为10,30,50)下,误比特率随信噪比Eb/N0的变化曲线。-Design of a direct sequence spread spectrum interference system, PN code generated by the m sequence generato
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一个MIMO 2*2系统的误码率仿真,收端采用MMSE-SIC检测方式-computing the BER for BPSK modulation in a Rayleigh fading channel with 2 Tx, 2Rx MIMO channel Minimum Mean Square Error Equalization with Successive Interference Cancellation
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把地理区域分成一个个小区,蜂窝系统在该区域内提供无线覆盖。把可用的频谱分成很多信道,每个小区分配一组信道。使用频分双工(FDD)。在小区间进行频率利用,N个小区构成一个簇,簇间进行频率复用。定义了传播特性(信道参数)以及同频小区的位置。信道的参数包括:小区半径,路径损耗指数,以分贝为单位的对数正态阴影的标准差,基站发射功率级,移动台发射功率级,每个小区的扇区数,扇区化天线的正反向比,要仿真的瞬时位置的组数,同频干扰阈值。-To a geographical area is divided int
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针对类圆形堆积物图像的前景和背景在色彩或灰度上相近,难以用传统阈值分割等算法进行有效分割的问题,提出一种多方法融
合的类圆形堆积物图像区域分割策略。对图像进行滤波等一系列预分割处理后进行投影得到目标图像的外接矩形区域,以排除噪声的干扰,
在区域内采用改进的灰度共生矩阵方法进行粗分割,以解决窗口大小与分割精度的问题,采用二维OTSU 阈值分割方法对粗分割结果进行
量化。实验结果表明,该方法得到的区域分割结果边缘清晰、准确度高。-Round deposits for the prospe
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OFDM 通信系统仿真,包括信道建模,调制解调,求信噪比,功率分配
(压缩包内含50个源码程序)-OFDM communication system simulation, including channel modeling, modulation and demodulation, and signal to noise ratio, power distribution
(Compressed package containing the source program 50)
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SPEECH ENHANCEMENT BASED ON WAVELET DENOISING
Abstract: - Noise is an unwanted and inevitable interference in any form of communication. It is
non-informative and plays the role of sucking the intelligence of the original signal. Any kind of
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跳频是按跳频序列随机改变一个信道所占有频道频率的技术。在GSM 系统中,可利用跳频技术频率分极和干扰分极的特点,改善网络质量。引入跳频技术,可保证在网络软拥塞不上升的情况下,频率复用度较小。-FH frequency hopping sequence is based on a random channel change in the country channel frequency technology. In the GSM system, can make use of frequenc
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OFDM(正交频分复用)技术实际上是MCM(Multi-Carrier Modulation,多载波调制)的一种。其主要思想是,将信道分成若干正交子信道,将高速数据信号转换成并行的低速子数据流,调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开,这样可以减少子信道之间的相互干扰(ICI)。每个子信道上的信号带宽小于信道的相关带宽,因此每个子信道上的可以看成平坦性衰落,从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分,信道均衡变得相对容-OFDM (
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设计一个2阶加权自适应噪声对消器,对经加性白高斯噪声信道干扰的正弦信号进行滤波-The design of a 2-order-weighted adaptive noise cancellation, and for the AWGN channel interference filtering of sinusoidal signals
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scr ipt for computing the BER for BPSK modulation in a
Rayleigh fading channel with 2 Tx, 2Rx MIMO channel
Zero Forcing Equalization with Successive Interference
Cancellation (ZF-SIC)-scr ipt for computing the BER for BPSK modulation in a
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讨论了变换域通信系统中收发端一致时的系统性能,包括AWGN信道及单音,多音,窄带,扫频干扰-Discussed the transform domain communication system is identical to sending and receiving end system performance, including the AWGN channel and the tone, multi-tone, narrowband, swept-frequency interfere
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为了匹配信道特性达到较佳的传输效果,应选用适当码型,以便在最小传输带宽的条件下大大减小或消除这种干扰。选用了MATLAB软件进行了仿真,设计实现了一些简单的常用码型-In order to match the channel transmission characteristics to achieve better results, should use the appropriate code type, so that under the conditions of minimum tra
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scr ipt for computing the BER for BPSK modulation in a
Rayleigh fading channel with 2 Tx, 2Rx MIMO channel
Zero Forcing Equalization with Successive Interference
Cancellation (ZF-SIC) with optimal ordering- scr ipt for computing the BER
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均衡技术是克服码间干扰(Inter-Symbol Interference,ISI)的有效措施,由于信道特性的随机性与时变性,实际中消除码间干扰最常用的是自适应均衡器。本文对基于最小均方(Least Mean Squares,LMS)算法和递推最小二乘(Recursive Least Squares,RLS)算法的自适应均衡器进行仿真研究,分析了信道特性与设计参数对自适应均衡器的收敛速度与稳态性能的影响。
-Equalization technique is to overcome inte
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Clear Channel Assessment Using TI MSP430 and CC2500 Radio-This application report describes a 2.4-GHz anti-jamming frequency-hopping system consisting of a designated Transmitter and Receiver, each with distinct functions to avoid RF-channel interfer
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参数时变信道的频率选择性和时变性。BPSK符号率=512b/s,采样率=16个采样/s,a1(t) 和a2(t) 为多普勒带宽=16Hz。结果为符号间干扰。-Parameters of time-varying channel frequency selectivity and time-variant. BPSK Symbol Rate = 512b/s, sampling rate = 16 samples/s, a1 (t) and a2 (t) as the Doppler bandwi
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本次设计是对GSM TCH/FS信道进行编码设计及性能仿真,仿真通信系统包括内外编码器、交织重排器、加性/突发和混合干扰信道、去交织反重排器、内外译码器,模拟了信息从信源到信宿的全过程; 在高斯噪声、突发干扰或混合信道及瑞利信道下测试每个步骤对误码率和系统性能的影响,通过数字及图形的比较,得出通信系统中各个模块的作用。另外,在GSM TCH/FS 的基础上建立GSM TCH/EFS 信道,对相应的信道环境进行仿真,得出误码率分析。-This design is the GSM TCH/FS ch
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Analysis of outage probability in mobile cellular system due to co channel interference.
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