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

Claim 17:
18. An electronic device comprising:
a transmitter having a quadratic phase generator configured to output a constant amplitude zero autocorrelation (CAZAC) sequence, the quadratic phase generator having a first integrator stage, a second integrator stage coupled in series with the first integrator stage and having an output coupled to an output port of the quadratic phase generator, and a switch with 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, a second input configured to receive a second value different than the first value, and an output that is coupled to an input of the first integrator stage;
a digital-to-analog converter having an input coupled to the output port of the quadratic phase generator and configured to receive signals generated based on the CAZAC sequence and an output coupled to a first antenna;
a first channel filter interposed between the transmitter and the input of the digital-to-analog converter, the first channel filter having the same bandwidth as the quadratic phase generator;
an analog-to-digital converter having an input coupled to a second antenna and having an output on which digital signals are generated;
a receiver having an input configured to receive signals generated based on the digital signals output from the analog-to-digital converter; and
a second channel filter interposed between the output of the analog-to-digital converter and the input of the receiver, the second channel filter having the same bandwidth as the quadratic phase generator.