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4下载:
一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道:不考虑通信信道信号时,由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。,A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct
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一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN信道。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。-A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modulation, AWGN
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设计一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN信道。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。-Designed a four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modul
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5扩32 扩频方法仿真 进行SNR估计 产生pn码 基带仿真-5 extended to 32 spread-spectrum method is estimated SNR simulation
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利用M函数仿真扩频通信系统。6个用户的CDMA的同步通信系统,每个用户利用L=31的Gold码,进行扩频,信道为AWGN信道,接收端利用匹配滤波器进行检测。绘出当N=10000个发射比特下,SNR=0:15(dB)时的误码率曲线。
-M function simulation using Spread Spectrum Communication System. 6 simultaneous users of CDMA communication system, each user of t
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灵巧干扰对直接序列扩频信号发射机和接收机的干扰仿真程序,包括通信发射机电路、接收机捕获电路、码跟踪电路、载波捕获电路、防假捕电路、信噪比估计电路和数据解调电路-Smart interference on direct sequence spread spectrum signal transmitter and receiver interference simulation program, including communications transmitter circuit, recei
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这是一篇很好的有关信道估计的文章,
可以用来快速的了解信道估计的基本内容-In this paper, a method for fast blind estimation
of DS-SS signal is proposed which aims at the
Direct-Sequence Spread- Spectrum (DS-SS) signals
with parameters unknown. Considering the
characteristic th
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IEEE经典文章,CDMA PN序列差分捕获技术,文章内容详细,对学习和从事直接序列扩频同步捕获CDMA系统设计人员有很大帮助,推荐-New differentially coherent detectors for acquisition of direct sequence spread-spectrum signals are ntroduced. These detectors are alternatives to the noncoherent detectors that have
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直接序列扩频的系统仿真,适合理解原理,很实用-Simulation of direct sequence spread spectrum system for understanding the principle, it is practical
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为了进一步提高直接序列/跳频(DS/FH)扩频系统的抗干扰能力,基于小波包变换结合递归最小二乘算法设计
了一种变换域自适应干扰抑制算法,该算法采用小波包分解定位窄带干扰,递归最小二乘算法抑制窄带干扰。通过蒙特卡
罗仿真分析在增加抗干扰模块后,DS/FH系统工作在准静态时,在不同信噪比条件下抗窄带干扰性能。仿真结果表明:该
算法具有较强的自适应性以及抗窄带干扰能力,其性能优于传统的直接置零法,适用于多音干扰下的恶劣通信环境。-In order to further improve th
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使用matlab及sinmulink对扩频系统进行仿真,并做出了误码率和信噪比的图形-To matlab and sinmulink spread spectrum system simulation, and make the BER and SNR graphics
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简单的直接序列扩频程序,讲座不同信噪比情况下系统的误码率。出于简单考虑,信道噪声采用高斯白噪声。-Simple Direct Sequence Spread Spectrum program, lectures BER SNR. Sake of simplicity, the channel noise Gaussian white noise.
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编写了MATLAB程序生产和扩频码进行仿真,仿真程序从发送方完成通道的接收端,得出在不同的扩频码,在不同的信噪比即误码率的图形比较直接序列扩频通信系统原理,改善系统性能的度-Written MATLAB program to produce and direct sequence spread spectrum communication system principle of spreading codes for simulation, emulation program to comple
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Direct sequence spread spectrum (DSSS) communication systems has been widely
used in these years for its advantage of wide spectrum, low working Signal-to-Noise
ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD.
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直序扩频通信系统仿真实例,信源为数字信号信道信噪比为10dB的直扩通信系统仿真实验simulik文件-Direct sequence spread spectrum communication system simulation example, the source for digital signal channel SNR for 10 db of spread spectrum communication system simulation simulik file
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传统扩频水印嵌入及检测技术的实现,并求得处理后的信噪比和错误率-Conventional spread spectrum watermark embedding and detection technology to achieve and obtain SNR and error rate after treatment
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mc-cdma的扩频,调制,加GI,通过瑞利信道 信噪比 误码率,去前缀,解调,解扩部分-mc-cdma spread spectrum modulation, plus GI, through the Rayleigh channel SNR BER, go prefix, demodulation, despreading section
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SNR vs. BER Plot
Spread Spectrum Modulation, BPSK Signal through AWGN Channel
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建立了直接序列扩频系统的matlab仿真模型,在信道中存在高斯白噪声和干扰的情况下,对系统的在不同扩频增益下的误码率性能进行了仿真及分析,分析了扩频码的自相关性、误码率、性噪比。(A matlab simulation model of the direct sequence spread spectrum system, the existence of Gauss white noise and interference in the channel under the condition
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5. 在三条径的瑞利信道中,对于直接序列扩频:
(1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法,接收机分别采用等均益合并、最大比合并。用Simulink进行仿真,画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。
(2) 设频率已经同步,请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法,用Simulink进行仿真,画出比特信噪比与捕获概率的关系曲线。
(3) 设时间已经同步,请设计DS-CDMA一种具体的频率同步方法,用Simulink进行
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