Description: 《MIMO-OFDM关键技术的研究和完整仿真平台的建立》，建立了一个完整的MIMO-OFDM的仿真平台，为实际的硬件平台提供解决方案，给出性能评估。为建立这个完整的仿真平台，本文从MIMO-OFDM信号模型，提出系统实现的各个关键技术:帧同步和载波频偏估计、信道估计、采样同步和载波跟踪、空时/频编解码。- MIMO-OFDM key technology research and the establishment of a complete simulation platform , the establishment of a complete MIMO-OFDM simulation platform, for the actual hardware platform to provide solutions, given performance evaluation. For the establishment of the integrity of the simulation platform, this article from the MIMO-OFDM signal model, the system in all key technologies: frame synchronization and carrier frequency offset estimation, channel estimation, sampling synchronization and carrier tracking, space-time/frequency codecs. Platform: |
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Author:李继龙 |
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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: Script for performance measurements for Carrier and Sampling Frequency
Offset Correction in OFDM Systems Platform: |
Size: 1024 |
Author:Ali |
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Description: Simulink 实现的FM调制，载波13KHz，频偏3KHz，调制波形存为一个波形文件。FM解调采样双斜率鉴频，解调直接输出到声卡。-Simulink implementation of the FM modulation, carrier 13KHz, offset 3KHz, modulation waveform file saved as a waveform. FM demodulation of two-slope Kam sampling frequency, demodulated output directly to the sound card. Platform: |
Size: 25083904 |
Author:qinyn |
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Description: AD采样频率为10K，序列发生器SEQ1和SEQ2级联成一个16通道的序列发生器，
* 采样模式采用顺序采样。利用通用定时器T1的周期中断来触发AD转换。
ADCINA0和ADCINB0为参考电平，对ADCINA0,ADCINA1，ADCINB0，ADCINB1连续10次采样，然后分别排序，滤波，取均值，用A0，B0的值计算增益和偏移量，用来校正A1，B1-AD sampling frequency of 10K, the sequence generator SEQ1 and SEQ2 cascaded into a 16-channel sequencer,* sampling mode with sequential sampling. The use of general-purpose timer interrupt to trigger the cycle T1 AD converter. ADCINA0 and ADCINB0 the reference level, the ADCINA0, ADCINA1, ADCINB0, ADCINB1 10 consecutive samples, then were sorting, filtering, taking the mean, with A0, B0 the value gain and offset used to correct the A1, B1 Platform: |
Size: 306176 |
Author:yu hao |
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Description: This paper considers the design of linear
frequency-domain receivers with oversampling for OQPSK
(Offset Quaternary Phase Shift Keying) signals. Based on
a receiver structure able to eliminate the residual interference
between in-phase (I) and quadrature (Q) components
at the sampling instants, a method that minimizes the
overall residual ISI (Inter-Symbol Interference) plus IQI
(I-Q interference) is proposed. Therefore, this receiver significantly
outperforms previous frequency-domain OQPSK
receivers. Platform: |
Size: 284672 |
Author:吕立圣 |
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Description: This paper considers receiver designs for
SC-FDE schemes (Single-Carrier with Frequency-Domain
Equalization) employing M-ary OQAM signals (Offset
Quadrature Amplitude Modulation). It is shown that the
interference between the in-phase (I) and quadrature (Q)
components at the sampling points can lead to severe
performance degradation. Therefore, receivers without
residual I-Q interference (IQI), as well as receivers with
IQI cancellation were developed. Our performance results
show that the new receivers are suitable to M-ary OQAM
schemes. Platform: |
Size: 421888 |
Author:吕立圣 |
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Description: 输入信号: cm.txt 含有胎儿和母亲的心电信息的混合心
电信号.
mother1024.txt 母亲的心电信号
参数: 抽样频率:200Hz
数据长度:1024
要求: 用自适应滤波的LMS算法抵消掉混合心电信号中
母亲的心电信号。
注意u和N的选取，在报告中说明u和N的选取对滤
波结果的影响。
自适应滤波By莫小凯-Input signal: cm.txt containing the fetus and the mother of ECG information mixed ECG mother1024.txt mother ECG parameters: sampling frequency: 200Hz data length: 1024 requirements: LMS adaptive filtering algorithm offset mixed ECG ECG mother. Note that the selection of u and N u and N selection filtering results in the report. By Mo Oscar adaptive filtering Platform: |
Size: 92160 |
Author:moxiaokai |
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Description: 本系统可做自动控制原理中的时域分析仿真实验，系统特性如下：
1：可选择仿真系统为一阶、二阶、任意阶
2：可选择信号源为正弦波、三角波、锯齿波、方波（可模拟阶跃信号），并可调节信号源频率、幅值、相位、偏移、方波占空比
3：可选择信号采样率及采样数
4：自动计算传递函数
5：自动计算时域响应参数（增益系数、上升时间、峰值、峰值时间、稳定时间、超调量）
6：波形图同时显示原始信号和响应信号
注：使用本系统需安装labview控制设计与仿真库-The system can do automatic control theory in the time-domain analysis simulation, the system behaves as follows: 1: simulation system can be selected for the first, second, any order 2: select the signal source is a sine wave, triangle wave, sawtooth, square wave (analog step signal), and can adjust the signal source frequency, amplitude, phase, offset, duty cycle square wave 3: the the optional signal sampling rate and the number of samples 4: automatic calculation of the transfer function 5: Automatic calculation domain response parameters (gain coefficient, rise time, peak, peak time, settling time, overshoot) 6: waveform diagram shows both the original signal and the response signal Note: Use the system to be installed LabVIEW Control Design and Simulation library Platform: |
Size: 79872 |
Author:朱熙文 |
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Description: 盲多载波频偏估计算法，使用过采样算法。估计载波频率偏移-Blind Estimation of multiple carrier frequency offset. The goal of this Matlab script is to identify a Multiple antenna system with multiple Carrier Frequency Offsets based on over-sampling. This code will plot
the blind estimation results using figures. Platform: |
Size: 10240 |
Author:hou weikun |
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Description: 假设截获了一段短波数字通信的信号，要求解调出最终的信息，每组解调出来后，将10组信息组合起来，恢复最终的信源输出数据。
先验信息：两组数据文件，编号为1、2，每组I、Q两路存放，格式为“int16”，采样率为9600Sa/s，其中第一组为单径情况，第二组为多径情况。
参数符合MIL-STD-188-110A标准；
同步序列为syn=seq.dat，BPSK调制；
接收机频率稳定度高于1e-6。
文件中有效信息总长度为333.75s，其中同步头长为5/12s，每时隙1/6s，训练序列占10 ，在数据之前；
交织方式为全交织，矩阵交织，列为1000，在比特级进行；
纠错码码率为1/2；
调制方式为BPSK、QPSK和8PSK中的一种，映射方式为二进制，BPSK相位偏移为0，其余两种为 。
-Suppose intercepted signal for a period of short-wave digital communications requires final demodulated information after each demodulated, combining 10 group information, to restore the final output data source.
Priori information: two sets of data file, numbered 1, 2, each I, Q two-way storage, the format is int16 , sampling rate 9600Sa/s, where the first group is a single path, the second group multipath situation.
Parameters meet MIL-STD-188-110A standard
Synchronization sequence syn = seq.dat, BPSK modulation
The frequency stability of the receiver is higher than 1e-6.
File payload total length of 333.75s, wherein the synchronization header length is 5/12s, each time slot 1/6s, accounting for 10 of the training sequence, before the data
Interleaving for the whole interleaving matrix interleaving, as 1000, carried out at the bit level
Error correction code rate of 1/2
The modulation scheme is BPSK, QPSK and 8PSK one, a binary mapping, the BPSK phase offset is 0, the Platform: |
Size: 4096 |
Author:suxiaogua |
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Description: Gardner位同步算法与锁相环的联合仿真程序.加入了时偏和频偏，能很好地锁定时偏和频偏，得到最佳采样输出。(Gardner bit synchronization algorithm and phase-locked loop joint simulation program, adding time offset and frequency offset, can well lock the bias and frequency offset, get the best sampling output.) Platform: |
Size: 2581504 |
Author:fan_xianbao
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Search - sampling frequency offset