US 12,345,826 B2
Adaptive oscillator frequency error estimation based on oscillator temperature noise level
Mohammed Tawashi, San Diego, CA (US); and Jordan Cookman, San Jose, CA (US)
Assigned to Qualcomm Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 17, 2022, as Appl. No. 17/820,426.
Prior Publication US 2024/0061062 A1, Feb. 22, 2024
Int. Cl. G01S 5/00 (2006.01); G01S 5/02 (2010.01)
CPC G01S 5/0036 (2013.01) [G01S 5/0236 (2013.01)] 40 Claims
OG exemplary drawing
 
1. A method of oscillator frequency error estimation performed by an electronic device, comprising:
receiving, from a power management integrated circuit (PMIC), a plurality of temperature measurements of an oscillator of the electronic device;
determining a temperature noise level estimate of the oscillator based on the plurality of temperature measurements;
determining, based on the temperature noise level estimate, a set of parameters for determining a frequency error estimate of the oscillator; and
determining the frequency error estimate of the oscillator based on the set of parameters;
wherein determining the temperature noise level estimate of the oscillator comprises:
determining a set of differential temperature values based on at least the plurality of temperature measurements; and
determining a set of differential variances based on at least a filter weight applied to the set of differential temperature values.