Patent ID: 11863225
Assignee: APPLE INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 10:
11. A method for operating wireless circuitry, the method comprising:
receiving digital signals at a digital-to-analog converter and converting the digital signals to analog signals for transmission via an antenna; and
outputting an interpolated constant amplitude zero autocorrelation (CAZAC) sequence from a quadratic phase generator, wherein the quadratic phase generator has an output port coupled to an input of the digital-to-analog converter, wherein the digital signals received at the digital-to-analog converter are generated based on the interpolated CAZAC sequence output from the quadratic phase generator and wherein outputting the interpolated CAZAC sequence from the quadratic phase generator includes
controlling a switch having a first input configured to receive a first value that is a function of a chirp count q that defines a number of chirps in the CAZAC sequence and having a second input configured to receive a second value different than the first value to selectively output the first value and the second value to a first integrator stage,
receiving signals from the first integrator stage at a second integrator stage, wherein the second integrator stage has an output connected to the output port of the quadratic phase generator, and
outputting the interpolated CAZAC sequence from the second integrator stage.