GPS cold start sensitivity

[Ross]

I was looking through documentation and I noticed that in OPS v0.7.1 the cold start was stated to be -144dBm. In PS v1.1 it calls out -142dBm. Can you explain why they are different?

My other question is that we were told that there would be an improvement to GPS in November with modem firmware update v1.1. Do we expect this table to be updated to reflect the improvements that were made? what will they be?

Thanks

[Øyvind]

Hello, 

I do not have the answers, and have therefore forwarded your inquiry to our GPS expert in the nRF91 team.

Will get back to you as soon as I have an answer.

Kind regards,

Øyvind

[Øyvind]

Next week is Christmas holiday for the Nordic support team, and you must expect some delay in your answers. Full support is back at the beginning of January.

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Hello, 
Please see response from our GPS team:

In OPSv0.7.1, a 1 dB LNA was assumed, whereas in PSv1.1 a 2 dB LNA was assumed.

For FW1.1, we prioritized and implemented a number of important features and improvements: AGPS readiness, GPS operation during LTE idle-DRX and idle-eDRX, improved cold start TTTF with AGPS assistance, as well as substantially improved TTFF in unassisted hot and cold starts in non-ideal conditions.

The plan is still to provide improved cold start sensitivity in future releases.

Kind regards,
Øyvind