10-31-2017 09:19 PM
11-01-2017 08:34 PM
You can refer to AT&T and Wico's application.
For instance, Sounding Signal Duration and Repetition Time.
Maximum Delay spread
𝜏_𝑚𝑎𝑥=1.33 𝜇𝑠 400m propagation path
Vehicular Speed Example
Speed of 100 km/hr = 27.77 m/s
Maximum Doppler frequency 𝑣_𝑚𝑎𝑥=5.40 𝑘𝐻𝑧 for 60 𝐺𝐻𝑧
Coherence Time =78.3𝜇𝑠
Our repetition time =𝑇_𝑟𝑒𝑝=1.33 𝜇𝑠
@100 km/hr
Channel will get sampled about 58 times within the coherence time
@5 km/hr
Channel will be sampled about 1200 times within the coherence time
10-19-2018 04:08 PM
Has anyone ever had issues regarding the NI mmwave transceiver on the issue of a sinusoid noise being generated on the transmitter side and this is unnecessarily modulating the sent data. It seems to be a Local Oscillator Leakage issue, can anyone discuss more on it. I've attached images of how the received data looks and just the received noise alone.