Our group is trying to use the NRF52833DK do phase-based distance estimation as described in the attached paper. To do this we want to transmit packets with constant tone extensions at different frequencies and look at the way the phase of received CTE waveforms varies with distance between transmitter/receiver. We have had trouble doing so and we think this is because each time we change the frequency, the radio must be disabled and re-enabled and the phase of carrier waveforms is not preserved.
Is it possible to transmit packets at different frequencies in such a way that for each packet the phase of the output of the transmitter either has a consistent offset some constant time before the beginning of a packet, or varies in a continuous way as the frequency is changed, i.e. for a sequence of increasing frequencies, the phase of the carrier waveform would look like a continuous piecewise linear function with a slope that increases each time the frequency increases?
