Hello, I have been trying to estimate the Noise Figure of the X440. I looked through all the documentation I could find and couldn't find it anywhere, so I tried to calculate it myself.

*How can I use the calibration file in python to obtain estimated received power level at the RX side in dBm?* This is not clear in the documentation. I would like to do this for the TX side as well. Thanks! References: https://files.ettus.com/manual/classuhd_1_1usrp_1_1multi__usrp.html#a1dadf323c5f00ac4f93b231adc13e34...

From the received signal, I wish to acquire AoA information based on the phase of the channel estimates that I compute from the received known OFDM symbols.

An estimate of power required to reach hull speed is obtained using Keiths formula (line 90). This usually works out to about 1 HP per 500lbs displacement. A slip estimate is made using Gerrs formula for displacement hulls (line 110). Given power, slip and shaft RPM, propeller pitch and diameter are calculated using Crouchs method.

Va (velocity of advance) is estimated (lines 347, 348) and Bp is calculated (line 350). Lines 350 through 410 provide estimates of Delta (advance coefficient), P/D (pitch/diameter) ratio and efficiency based on the Taylor Bp charts. The calculation is made to provide optimum efficiency at a given Bp.

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like you, who don't have weeks to learn, or thousands to spend on an estimating program.

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When one returned from a fade one would want to try to re-estimate the phase relative to the local time base of the WWVB carrier (by knowing what phase state most symbols were) - and clearly one do this for a few bits before attempting to do any kind of estimation of unknown bits.

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