Elektronische Vorrichtungen mit Quadratischer Phasenerzeugungsschaltung

Details

Veröffentlichungs-Nr.

EP4145172

Aktenzeichen

EP22178248

Anmeldetag

9. Juni 2022

Veröffentlichung

8. März 2023

Rechtsraum

EP

IPC

G01S13/34H04J13/00G01S7/35

Abstract

An electronic device may include wireless circuitry. The wireless circuitry may include a quadratic phase generator for outputting a perfectly interpolated constant amplitude zero autocorrelation (CAZAC) sequence for a transmit path. The quadratic phase generator may include a numerically controlled oscillator, a switch controlled based on a value output from the numerically controlled oscillator, a first integrator stage, and a second integrator stage connected in series with the first integrator stage. The numerically controlled oscillator may receive as inputs a chirp count and a word length. The switch may be configured to switchably feed one of two input values that are a function of the chirp count and the word length to the first integrator stage. The quadratic phase generator may output full-bandwidth chirps or reduced-bandwidth chirps. Bandwidth reduction can be achieved by scaling the two input values of the switches.

Anmelder

Firma

Apple Inc.

Land

🇺🇸 USA

Fachgebiete