RSSI accuracy

[Stanislav Silnitskiy]

Hello!

As per documentation, RSSI is measured during the time, when particular packet is being received. In particular, nRF51822 Product Specification v3.1 states RSSIperiod as 8.8 us at minimum. Does it mean, that it can differ for packets with different length?

If so, does it mean, that overall accuracy of RSSI can be improved, implementing a sophisticated filter over greater number of RSSI samples for shorter packets, compared to averaging for longer packets, as it is implemented in hardware?

[Kenneth]

The RSSI measurement is done one time for each packet received, there is a radio short 'ADDRESS_RSSISTART' that can be enabled to do one RSSI sample after each radio address match.

[Stanislav Silnitskiy]

Hi Kenneth! Yes, I saw it in docs and I like the concept of SHORTS. I wonder, is the length of time, when RSSI collected can vary depending on the packet length and is this appropriate field to play with, improving RSSI accuracy (overall, of course)? My vision is to receive more RSSI samples per second and filter them somehow. It is crucial in building positioning system, so every percent of improvement is important.