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fhss 扩频信号
- 扩频信号
DSSS.rar
- 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
baseband_verilog.rar
- verilog实现的基带信号编码,整个系统分为六个模块,分别为:时钟模块,待发射模块,卷积模块,扩频模块,极性变换和内插模块,成型滤波器,verilog implementation baseband signal coding, the entire system is divided into six modules, namely: the clock module, to be launched modules, convolution module, spread spectrum m
Carrier_Trace
- 包括载波跟踪和伪码相位跟踪,用Matlab实现直接序列扩频信号的跟踪程序。-Including pseudo-code tracking and carrier phase tracking using Matlab implementation of direct sequence spread spectrum signal tracking procedures.
ds-ss
- 直接序列扩频信号的产生与捕获模拟 调用GoldGenerator.m生成GOLD伪码-GoldGenerator and DS-SS
DSSS
- 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
kuopinxinhaojiance
- 利用MATLAB对扩频信号进行检测和参数估计,结果表明本方法具有在低信躁比下检测的优势-The use of MATLAB for spread spectrum signal detection and parameter estimation results show that this method is in the low than under the letter impatient edge detection
DSSS-Transmitter
- 北斗定位系统卫星下行信号的基带处理部分——基于FPGA的直接序列扩频发射机的设计与仿真。-Beidou Positioning System satellite downlink of the baseband signal in part- based on direct sequence spread spectrum FPGA Design and Simulation of the transmitter.
Digtalbasis
- 理解通信系统特别是无线通信系统对基带信号的处理方法及目的,包括基带系统的差错控制,扩频跳频原理,保密通信等基本原理和实现方法。 -Understanding of communication systems, especially wireless communications system to the base-band signal processing methods and purposes, including base-band system for error control
Q_DSSS
- 直扩码分多址DS-CDMA是利用高速的WALSH正交码序列作为地址码,与多用户信息数据相乘得到信息数据的直接扩频信号,再经过BPSK调制后发送出去,经过AWGN无线信道的传输后,在接收端与本地产生的地址码进行相关检测,从中将地址码与本地码一致的用户数据选出,把不一致的用户数据删除。-DS-CDMA DS-CDMA is the use of high-speed WALSH orthogonal code sequences as address code, with multi-user in
CDMA-2USER
- 二用户CDMA系统,信道为加性高斯信道,使用BPSK调制,15位M序列扩频,可以正确解扩解调。 输出为2用户的基带信号、扩频信号、PSK调制信号、解调信号的时域和频域特性,给出两个用户分别的误码率。 -Second, the user CDMA system, channel for the additive Gaussian channel, using BPSK modulation, 15 M Sequence Spread Spectrum, you can correct demo
BPSK_100M
- 直接序列扩频信号参数盲估计系统 估计载频、码速率、码周期等-Blind direct sequence spread spectrum signal parameters estimation system estimates the carrier frequency, code rate, code cycles, etc.
FFT_PN_CAPTURE
- FFT在高动态扩频信号捕获过程中的应用方法,基于此,可以相应地进行程序设计-FFT in the high dynamic spread-spectrum signal acquisition in the process of application method, based on this, you can design the appropriate conduct of the proceedings
smartjam
- 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
dsss_signal_detection_and_parament_estimate
- 自相关检测方法是利用信号和噪声在相关域上的差别来构造检测器的。自相关检测是将信号与自身延迟一个时延后的信号作相关处理,或用双通道接收机的输出进行相关,得到扩频信号的自相关函数-Auto-correlation detection method is the use of signal and noise in the relevant field to construct the difference detector. Autocorrelation test is a time delay
Direct_sequence_spread_spectrum_signal_generation_
- 基于matlab的直接序列扩频信号的产生与捕获模拟-Direct sequence spread spectrum signal generation and capture analog
fhss
- 扩频系统中的调频扩频程序。调频扩频信号的产生和检测-FM spread spectrum spread spectrum system procedures. FM spread spectrum signal generation and detection
DS扩频仿真
- 该系统由matlab实现,包括信号的产生、传输、调制、解调、解码等一系列的过程的模拟。(Direct Sequence Spread Spectrum)
DSSS_Matlab程序
- 所谓直接序列扩频,就是直接用具有高码率的扩频码序列在发送端去扩展信号的频谱。而在接收端,用相同的扩频码序列去进行解扩,把展宽的扩频信号还原成原始的信息。(Direct sequence spread spectrum (DSSS) is used to expand the spectrum of the signal directly at the transmitter side with high bit rate spread spectrum code sequence. At the
扩频系统通信仿真
- 扩展频谱通信系统是指待传输信息的频谱用某个特定的扩频函数扩展后成为宽频带信号,然后送入信道中传输,再利用相应手段将其解扩,从而获取传输信息的通信系统。它在传输同样信息时所需的射频带宽,远比大家熟悉的各种调制方式要求的带宽要宽得多。扩频前的信息码元带宽远小于扩频后的扩频码序列的带宽,信息己不再是决定调制信号带宽的一个重要因素,其调制信号的带宽主要由扩频函数来决定。一般常用的扩频函数是伪随机编码信号。与常规的通信系统相比,扩频系统具有很强的抗人为干扰、抗窄带干扰、抗多径的能力,此外还具有信息隐蔽多址