Search - received signal sampling

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[Other] wlan_transmitter DL : 0: 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
Update : 2025-02-17 Size : 1kb Publisher : 福东方
[Windows Develop] LMSfilter DL : 1: 假设一个接收到的信号为：x(t)=s(t)+n(t), 其中s(t)=A*cos(wt+a), 已知信号的频率w=1KHz，而信号的幅度和相位未知，n(t)是一个服从N(0,1)分布的白噪声。为了利用计算机对信号进行处理，将信号按10KHz的频率进行采样。通过对x(t)进行LMS自适应信号处理，从接收信号中滤出有用信号s(t). 在未知信号频率的情况下，通过对x(t)进行LMS自适应信号处理，从接收信号中滤出有用信号s(t). -Assuming a received signal: x (t) = s (t)+ n (t), one of s (t) = A* cos (wt+ a), the known frequency signal w = 1KHz, And the signal amplitude and phase of the unknown, n (t) is a subject to N (0,1) the distribution of white noise. The use of computers in order to deal with the signal, The signal by sampling frequency of 10KHz. Of x (t) for LMS adaptive signal processing, filtering from the received signal in the useful signal s (t). Frequency signals in unknown circumstances, the adoption of x (t) for LMS adaptive signal processing, filtering from the received signal in the useful signal s (t).
Update : 2025-02-17 Size : 1kb Publisher : Jane
[Other] qiweibakema_f DL : 0: 设雷达信号是码宽为0.5微妙，中心频率是10MHz的7为巴克码2PSK信号，接收的雷达回波中频采样频率为40MHz，中频进行正交下变频。假设在13.5km处有一个点目标，仿真该雷达的脉冲压缩处理。-Code-based radar signal is a delicate relief of 0.5, the center frequency is 10MHz for the 7 Barker Code 2PSK signal, the radar echo received IF sampling frequency of 40MHz, for orthogonal frequency down-conversion. 13.5km Assuming there is a point target, simulation of the radar pulse compression processing.
Update : 2025-02-17 Size : 1kb Publisher : kiara
[Mathimatics-Numerical algorithms] IndoorlocationTrackingUsingRSSIReadingsfromasingle DL : 0: 通过单一的Wi-Fi接入点的信号强度来判断移动物体的位置。比较新的一篇文章。用了蒙特卡罗抽样的办法－Monte Carlo Sampling Method－来估计位置。-This paper describes research towards a system for locating wireless nodes in a home environment requiring merely a single access point. The only sensor reading used for the location estimation is the received signal strength indication (RSSI) as given by an RF interface, e.g.,Wi-Fi.Wireless signal strengthmaps for the positioning filter are obtained by a two-step parametric and measurement driven ray-tracing approach to account for absorption and reflection characteristics of various obstacles. Location estimates are then computed using Bayesian filtering on sample sets derived by Monte Carlo sampling. We outline the research leading to the system and provide location performance metrics using trace-driven simulations and real-life experiments. Our results and real-life walk-troughs indicate that RSSI readings from a single access point in an indoor environment are sufficient to derive good location estimates of users with sub-room precision.
Update : 2025-02-17 Size : 442kb Publisher : weihuagao
[Communication-Mobile] baseband_detection_simulink DL : 0: In this simulink model , baseband binary detection is simulated .A rectangular pulse shaped signal is given as input to the detector.The received signal is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The binary signal transmitted is recovered at the detector output.-In this simulink model , baseband binary detection is simulated .A rectangular pulse shaped signal is given as input to the detector.The received signal is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The binary signal transmitted is recovered at the detector output.
Update : 2025-02-17 Size : 7kb Publisher : quail
[Communication-Mobile] pam_detection_simulink DL : 0: In this simulink model , baseband 8-ary PAM detection is simulated .A half-sine pulse shaped PAM signal is given as input to the detector.The received signal is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The 8-ary PAM signal transmitted is recovered at the detector output.
Update : 2025-02-17 Size : 8kb Publisher : quail
[Communication-Mobile] QAM16_simulink DL : 0: In this simulink model , 16-QAM modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.-In this simulink model , 16-QAM modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.
Update : 2025-02-17 Size : 9kb Publisher : quail
[Communication-Mobile] qpsk_simulink DL : 0: In this simulink model , QPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.-In this simulink model , QPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.
Update : 2025-02-17 Size : 8kb Publisher : quail
[matlab] 8 DL : 0: 设计一个理想通信系统，实现信息字符流的传输。发射器： <1>将消息（字符串形式）编码成一个符号序列； <2>用脉冲成形将串符号序列转变成模拟脉冲信号； <3>将模拟脉冲信号调制到载波信号上。接收器： <1>对接收的信号进行采样； <2>解调信号成基带信号； <3>将信号恢复成字符串。-Design an ideal communication system, the realization information transmission of character flow. Emitters: < 1 > will news (string form) coding into a symbol sequence < 2 > by using a pulse forming will string of symbols into a simulation pulse signal sequences < 3 > will simulate the pulse signal modulation to carrier signal. Receiver: < 1 > of received signal sampling < 2 > demodulation signal into baseband signal < 3 > will signal back into a string.
Update : 2025-02-17 Size : 5kb Publisher : 王荣
[matlab] SMI DL : 1: 仿真SMI（DMI）算法性能，观察采样快拍数对波束图的影响、接收信号中不包含、包含信号功率逐渐加大对波束图的影响-Simulation SMI (DMI) algorithm performance, the number of snapshots observed sampling effects on the beam diagram, the received signal does not contain, include the gradual increase of the signal power of the beam map
Update : 2025-02-17 Size : 1kb Publisher : lfzhang
[matlab] Adaptive-signal-processing DL : 0: 仿真SMI（DMI）算法性能，观察采样快拍数对波束图的影响，接收信号中不包含、包含信号功率逐渐加大对波束图的影响。-Simulation SMI (DMI) algorithm performance, the number of snapshots observed sampling effects on the beam diagram, the received signal does not contain, include the gradual increase in signal power diagram of the impact beam.
Update : 2025-02-17 Size : 1kb Publisher : lala2009
[matlab] QPSKpassAWGN DL : 0: 发送装置：随机信号产生、脉冲成型（上采样可调，滚降可调）；发送：AWGN信道（信噪比范围可调）接收设备：QPSK调制解调，匹配滤波，判决画出接收信号的眼图、星座图；计算误码率并与理论值比较。 -Transmitting device: random signal generator, pulse shaping (the sampling adjustable, adjustable roll-off) Send: AWGN channel (SNR range is adjustable) Receiving equipment: QPSK modulation and demodulation, matched filtering, judgment BER is calculated and compared with the theoretical value draw the received signal eye diagram, constellation.
Update : 2025-02-17 Size : 54kb Publisher : haoyuguang
[matlab] YUYIN DL : 1: 用matlab记录一段基带语音信号，采样频率设为44.1kHz。产生一个高斯白噪声随机过程，并将噪声叠加在语音信号上（相当于将语音信号通过一个高斯信道）。（1）设定不同的噪声信噪比，画出并比较高斯信道接收端的信号时域波形，播放接收信号。（2）由于语音信号的范围通常在3kHz以内，在接收端加载一个低通滤波器，截止频率为3kHz，画出并比较滤波前后的信号时域波形，并播放滤波后的信号。-Matlab record with some baseband voice signal, the sampling frequency is set to 44.1kHz. Generating a Gaussian white noise Random process, and the noise superimposed on the speech signal (corresponding to the speech signal through a Gaussian channel). (1) set different noise SNR, draw time-domain waveform signal and compares the receiving end of a Gaussian channel, broadcast Put the received signal. (2) Because of the voice signal is usually less than 3kHz, is loaded at the receiving end of a low-pass filter, Cutoff frequency of 3kHz, draw time-domain waveform signal and compare before and after filtering, the filtered and play Signal.
Update : 2025-02-17 Size : 1kb Publisher : 赵嘉琦
[matlab] Mfile DL : 0: 假设用图示所示的两个正交信号经由一个AWGN信道传输二进制信息，在持续期Tb的每个比特区间接收到的信号以10/Tb速率采样，即每个比特区间内10个样本，幅度为A。噪声是均值为零，方差为的高斯过程。写MATLAB程序，在方差为0,0.1,1.0和2.0时，完成接收信号和两种发射信号的每一种的离散时间相关，画出在时刻k=1,2,…,10相关器的输出。-Assuming an AWGN channel transmission via binary information in two orthogonal signals icon shown in the ratio of each signal received indirect SAR duration Tb to 10/Tb sampling rate, that is, within the range 10 samples per bit, amplitude A. Noise is zero mean and variance of the Gaussian process. Write a MATLAB program, the variance is 0,0.1,1.0 and 2.0, to complete each of the two discrete-time signals and transmit the received signal correlation shown in the time k = 1,2, ..., 10 output of the correlator .
Update : 2025-02-17 Size : 2kb Publisher : 卢昳丽
[matlab] xgdvicnh DL : 0: 主同步信号PSS在时域上的相关仿真，从先验概率中采样，计算权重，利用matlab GUI实现的串口编程例子，多目标跟踪的粒子滤波器，给出接收信号眼图及系统仿真误码率，包括数据分析、绘图等等,相参脉冲串复调制信号。- PSS primary synchronization signal in the time domain simulation related, Sampling a priori probability, calculate the weight, Use serial programming examples matlab GUI implementation, Multi-target tracking particle filter, The received signal is given eye and BER simulation systems, Data analysis, plotting, etc., Complex modulation coherent pulse train signal.
Update : 2025-02-17 Size : 8kb Publisher : nndbgheti
[matlab] izjvyepe DL : 0: DC-DC部分采用定功率单环控制，最终的权值矩阵就是滤波器的系数，一种噪声辅助数据分析方法,给出接收信号眼图及系统仿真误码率，从先验概率中采样，计算权重，使用起来非常方便，仿真效果非常好。- DC-DC power single-part set-loop control, The final weight matrix is ??the filter coefficient, A noise auxiliary data analysis method, The received signal is given eye and BER simulation systems, Sampling a priori probability, calculate the weight, Very convenient to use, Simulation of the effect is very good.
Update : 2025-02-17 Size : 10kb Publisher : fkchv
[matlab] pwqmntnk DL : 0: 给出接收信号眼图及系统仿真误码率，matlab编写的元胞自动机，滤波求和方式实现宽带波束形成，从先验概率中采样，计算权重，供做算法研究人员参考，可以动态调节运行环境的参数。- The received signal is given eye and BER simulation systems, matlab prepared cellular automata, Filtering summation way broadband beamforming, Sampling a priori probability, calculate the weight, Algorithm for researchers to do reference, Can dynamically adjust the parameters of the operating environment.
Update : 2025-02-17 Size : 8kb Publisher : zunvh
[matlab] lunsiu_v38 DL : 0: 给出接收信号眼图及系统仿真误码率，PLS部分最小二乘工具箱,从先验概率中采样，计算权重。- The received signal is given eye and BER simulation systems, PLS PLS toolbox, Sampling a priori probability, calculate the weight.
Update : 2025-02-17 Size : 7kb Publisher : manfei
[matlab] cfef84ad DL : 0: 仿真SMI（DMI）算法性能，观察采样快拍数对波束图的影响、接收信号中不包含、包含信号功率逐渐加大对波束图的影响-Simulation SMI (DMI) algorithm performance, the number of snapshots observed sampling effects on the beam diagram, the received signal does not contain, include the gradual increase of the signal power of the beam map
Update : 2025-02-17 Size : 1kb Publisher : zhao
[Algorithm] yeilei_v38 DL : 0: 从先验概率中采样，计算权重，时间序列数据分析中的梅林变换工具，给出接收信号眼图及系统仿真误码率。- Sampling a priori probability, calculate the weight, Time series data analysis Mellin transform tool, The received signal is given eye and BER simulation systems.
Update : 2025-02-17 Size : 5kb Publisher : casndyxv

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