Description: 产生15种模拟及数字调制信号函数。参数说明：type－调制信号种类,total_time－信号总时间长度,fc－载频,fs－抽样频率,symbol_rate－符号率-have 15 analog and digital modulation signal function. Parameter Description : type-modulated signal types,'04-Signal total time length, fc-carrier frequency, fs-sampling frequency, symbol_rate-Symbol Rate Platform: |
Size: 1190 |
Author:htt |
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Description: DSB-SC信号的生成与解调 1) 用离散（DSP）的方法生成DSB信号 2) 载波频率为150KHz，音频为500Hz和2000Hz的混合音。 3) 加入高斯白噪声 （4） 语音信号 的传输。 改变抽样频率和量化台阶大小，观察重建信号以及量化噪声信号的波形；对于语音信号主观评价声音质量的变化。 -DSB-SC signal generation and demodulation 1) Discrete (DSP) methods to generate DSB signal 2) the carrier frequency to 150KHz, audio 500Hz and 2000Hz for the mixed tone. 3) by adding white Gaussian noise (4) transmission of voice signals. Change the sampling frequency and quantization step size, to observe the reconstruction of signal and quantization noise signal waveform for subjective evaluation of the speech signal changes in sound quality. Platform: |
Size: 28961 |
Author:doucuole@126.com |
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Description: 产生15种模拟及数字调制信号函数。参数说明：type－调制信号种类,total_time－信号总时间长度,fc－载频,fs－抽样频率,symbol_rate－符号率-have 15 analog and digital modulation signal function. Parameter Description : type-modulated signal types,'04-Signal total time length, fc-carrier frequency, fs-sampling frequency, symbol_rate-Symbol Rate Platform: |
Size: 1024 |
Author: |
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Description: 本文首先概述了OFDM 的原理、特征和关键技术，介绍了系统需要的几种同步。然后就同步误差对系统性能的影响进行了简单的分析，表明定时偏差和采样频率偏差将会引入码间干扰，载波频率偏差导致载波间干扰的发生。因此，在OFDM系统接收机中定时的确定、载波频率偏差和采样频率偏差的纠正是信号恢复的关键。之后对OFDM系统同步的几种实现方法进行了介绍，分析了各同步方法的性能。-The paper first outlines the principles of OFDM, features and key technologies, the system needs to introduce several synchronization. Synchronization error and then the impact on system performance for a simple analysis, show that the timing deviation and the sampling frequency deviation will introduce inter-symbol interference, the carrier frequency deviation led to the occurrence of ICI. Therefore, in OFDM system receiver to determine the timing, carrier frequency offset and sampling frequency offset correction signal to restore the key. After the OFDM system to achieve synchronization of several methods of introduction, an analysis of the performance of the synchronization method. Platform: |
Size: 268288 |
Author:dajinyu |
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Description: WLAN仿真－发送机
wlan No Comments
设置完系统参数后，开始产生发送数据。
1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。
2. QAM映射
3. 将数据映射到不同载波，形成OFDM符号
4. 产生pilot，并将pilot插入OFDM符号中
5. 加入dc和guard子载波
6. 进行ifft，将频域信号变到时域，并加入循环前缀
7. 对信号进行overlap window
8. 在时域产生short preamble
9. 在时域产生long preamble
10. 将preamble和数据符号组成packet
11. 升采样
得到信道传输的数据Tx_signal_up
具体程序见附件 wlan_transmitter.m-WLAN Simulation- wlan No Comments transmitter system parameters set finished, the beginning to have to send data. 1. Have sent random bit (tx_bits), here does not consider channel coding. 2. QAM mapping 3. The data is mapped to a different carrier to form OFDM symbols 4. Have a pilot, and pilot inserted OFDM symbols 5. Adding dc and guard subcarriers 6. To carry out ifft, will change the frequency domain signal to time domain, and add cyclic prefix 7. the signals overlap window8. In the time domain have a short preamble9. In the time domain have a long preamble10. the preamble and data symbols packet11. or sampling received data transmission channel Tx_signal_up specific procedures see Annex wlan_transmitter.m Platform: |
Size: 1024 |
Author:福东方 |
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Description: 通信信号相干调制解调源码 Fc=10 ％载频
Fs=40 ％系统采样频率
Fd=1 ％码速率
N=Fs/Fd
df=10
numSymb=25 ％进行仿真的信息代码个数
M=2 ％进制数-Coherent modulation and demodulation of communication signal source Fc = 10 carrier frequency Fs = 40 systematic sampling frequency Fd = 1 code rate N = Fs/Fd df = 10 numSymb = 25 of the information code to simulate the number of M = 2 hexadecimal number Platform: |
Size: 1024 |
Author:包耐峰 |
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Description: DSB-SC信号的生成与解调
1) 用离散（DSP）的方法生成DSB信号
2) 载波频率为150KHz，音频为500Hz和2000Hz的混合音。
3) 加入高斯白噪声
（4） 语音信号
的传输。
改变抽样频率和量化台阶大小，观察重建信号以及量化噪声信号的波形；对于语音信号主观评价声音质量的变化。
-DSB-SC signal generation and demodulation 1) Discrete (DSP) methods to generate DSB signal 2) the carrier frequency to 150KHz, audio 500Hz and 2000Hz for the mixed tone. 3) by adding white Gaussian noise (4) transmission of voice signals. Change the sampling frequency and quantization step size, to observe the reconstruction of signal and quantization noise signal waveform for subjective evaluation of the speech signal changes in sound quality. Platform: |
Size: 28672 |
Author:Ryan |
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Description: Script for performance measurements for Carrier and Sampling Frequency
Offset Correction in OFDM Systems Platform: |
Size: 1024 |
Author:Ali |
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Description: 这是一个频分复用系统的数字处理方法，传送了2个wav文件，采样频率200kHz，2路载波的频率分别为44kHz，48kHz。整个代码涉及到wav文件的编码和解码，信号的数字滤波，调制解调。-This is a frequency division multiplexing system of digital processing methods, to send the two wav files, the sampling frequency of 200kHz, 2-carrier frequency of the road for 44kHz, 48kHz. Code relates to the whole wav file encoding and decoding, digital signal filtering, modulation and demodulation. Platform: |
Size: 3559424 |
Author:张力 |
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Description: 。本文在第2 节介绍信号的循环谱特征，并分析噪声对其
的影响；第3 节介绍识别方法；第4 节从仿真试验方面对识
别性能作分析；最后对全文进行了小结。文中部分符号如下：
Fc 为载波频率， Fd 为符号率， Fs 为信号采样频率。-. In this paper, Section 2 describes the cycle of the signal spectrum characteristics, and analyze the noise and the effects identification method introduced in section 3 in section 4 simulation results from an analysis in terms of recognition performance Finally, the paper are summarized. Paper, some of the symbols is as follows: Fc is carrier frequency, Fd for the symbol rate, Fs is sampling frequency. Platform: |
Size: 280576 |
Author:张颖 |
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Description: 利用前端高速ADC来覆盖给定的监视带宽, 在粗略估计载频并考虑一定的保护带, 利用带通信号的均匀欠采样定理行内插抽取, 以获得欠采样后的信号。-Using high-speed ADC front-end to cover a given monitor bandwidth, carrier frequency at a rough estimate and considering some of the protection zone, use less uniform bandpass sampling theorem interpolation line drawn in order to get the signal after subsampling. Platform: |
Size: 892928 |
Author:谢却荼靡 |
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Description: matlab源码编写的QPSK调制与解调程序，含载波及采样频率-matlab source code written in QPSK modulation and demodulation process, including the carrier and sampling frequency Platform: |
Size: 1024 |
Author: |
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Description: 1. Matlab实现基带信号s(t)=cos(wt)的时域波形和频域结果
2. Matlab实现中频信号(基本载频+信号频率)的时域波形和频域结果
-1. Matlab baseband signal s (t) = cos (wt) time-domain waveform and frequency-domain results. Matlab intermediate frequency signal (the basic carrier frequency the+ signal frequency) time-domain waveform and frequency-domain results Platform: |
Size: 14336 |
Author:张 |
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Description: 已知消息信号为一个长度为8的二进制序列；载波频率为 ，采样频率为4KHz。编程实现一种调制、传输、滤波和解调过程。-Known message signal is a binary sequence with a length of 8 the carrier frequency, the sampling frequency of 4KHz. Programming a modulation, transmission, filtering, and demodulation process. Platform: |
Size: 67584 |
Author:凡凡凡 |
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Description: 导频插入，此程序用ISE的verilog编写，主要用于载波提取和采样频率同步-Pilot insertion procedures prepared by the ISE verilog, mainly used for carrier extraction and sampling frequency synchronization Platform: |
Size: 161792 |
Author:牧童 |
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Description: 大作业4：信号的分数倍转换
本次作业每组有两个音频文件：music-28.wav和music-50.wav。
music-28.wav表明采样频率为28kHz采样（单声道，16位）的音乐文件，music-50.wav表明采样频率为50kHz采样（单声道，16位）的音乐文件，每个文件都加有单载波干扰。要求将这两个文件分别读出，将采样频率转换为16kHz，然后通过声卡播出。注意，声音不能失真不能含有单载波干扰。
-Great Job 4: scores of times signal conversion
The work of each group has two audio files: music-28.wav and music-50.wav.
music-28.wav show a sampling frequency of 28kHz sampling (mono, 16) of music files, music-50.wav show a sampling frequency of 50kHz sampling (mono, 16) of music files, each file plus a single-carrier interference. Requested that two documents were read out, the sampling frequency is converted to 16kHz, and then broadcast through the sound card. Note that the sound is not distorted can not contain single-carrier interference. Platform: |
Size: 4194304 |
Author:艾小麦 |
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Description: 单载波和光OFDM信号调试400M带宽5G信号，载频可变，采样率50G-Single-carrier and the bandwidth of the optical OFDM signal debugging 400M 5G signal carrier frequency variable sampling rate 50G Platform: |
Size: 2040832 |
Author:yuzhenming |
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Description: 产生4FSK调制信号的函数，可以设置载波频率，采样频率。(The function of generating 4FSK modulation signal can set carrier frequency and sampling frequency.) Platform: |
Size: 1024 |
Author:glny |
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Search - Carrier and Sampling Frequency