Fs=1e6# lets say we sampled at 1 MHz# assume x contains your array of IQ samplesN=1024x=x[0:N]# we will only take the FFT of the first 1024 samples, see text belowPSD=np.abs(np.fft.fft(x))**2 /(N*Fs)PSD_log=10.0*np.log10(PSD)PSD_shifted=np.fft.fftshift(PSD_log) 或...
Radio frequency (RF) fingerprinting techniques provide a promising supplement to cryptography-based authentication approaches but rely on dedicated equipment to capture in-phase and quadrature (IQ) samples, hindering their wide adoption. Recent advances advocate easily obtainable channel state information (...
B2X0 USRP和PlutoSDR都包含一个RF集成电路(RFIC),可以采样高达56 MHz,这对于我们将遇到的大多数信号来说已经足够高了。 重申一下,下转换过程由我们的 SDR 执行 ;作为SDR的用户,除了告诉它调谐到哪个频率之外,我们不需要做任何事情。下变频(和上变频)由称为混频器的组件完成 ,通常在图中表示为圆圈内的乘法符号...
(IQDR) by using Bluetooth® Toolbox. The tests compute relative phase, reference phase deviation, and amplitudes of IQ samples at each antenna in an antenna array. This example also verifies whether these test measurement values are within the limits specified by the Bluetooth RF-PHY Test ...
捕获内存深度 64 Msamples Measurement Frequency Resolution 0.1 Hz Input Impedance 50 Ω (nominal) Power Measurement Accuracy2, 3 <± 1 dB (level > -40 dBm), 75 MHz to 300 MHz <± 0.4 dB (level > -40 dBm), 300 MHz to <3800 MHz <± 0.75 dB (level > -40 dBm), 3800 ...
In combination with the Vector Signal Generator R&S SMV03 the I/Q baseband signal can be upconverted to the RF. Each channel can store 16 000 000 samples. Even at high symbol rates sequences of sufficient length can thus be generated. With clock frequencies of up to 100 Msample/s and ...
M = 4; % QPSK spf = 1e6; % Samples per frame data = randi([0 M-1],spf,1); txSig = pskmod(data,M,pi/4); Create a constellation diagram object to display the QPSK signal before and after IQ imbalance compensation. The reference constellation for the object does not require an upd...
the software allows users to create standard waveforms or customized waveforms with specific modulation and frequency-hopping criteria. In Auto mode, the software can automatically calculate the waveform length (in time (sec), samples, or symbols) and the sampling rate required to accurately create ...
我现在工作的项目目前正在调谐PMR频率和保存音频到WAV文件,但是,当我从SDR设备接收IQ样本,并解调到am-我只听到噪声。编辑,这是写入WAV文件的原始IQ:https://voca.ro/iSRELps4JBg 对于解调,我使用了这种方法: https://github.com/simonyiszk/minidemod/while(get_samples(buffer, buffer_size) == ...
I am aware of that. I captured IQ Meas Time samples at both 1 Point/symbol and at 4 Point/...