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AppleGranted patentNetworks & wirelessInterest 3/10

Apple patents method to keep wireless signals within legal frequency limits

Apple has been granted a patent for a system that helps wireless devices stay within their assigned frequency channels. The device uses a temperature sensor to detect how its internal clock drifts due to heat, then adjusts the signal before sending it to prevent it from spilling into neighboring channels.

Why it mattersThis ensures devices comply with strict government rules on radio spectrum usage, preventing interference with other nearby wireless connections.

In the filing’s own words

Frequency spectrum of wireless transmission signals are allocated based on availability and regulatory requirements. To ensure transmission signals are within designated channel boundary, user equipment utilizes processing circuitry coupled to a transceiver to pre-compensate for estimated frequency shift at the time of transmissions. Certain guard bands are provided such that the actual transmission signals with the frequency pre-compensation are within the designated channel boundary. Additionally, or alternatively, the user equipment utilizes the processing circuitry to pre-compensate for estimated time shift based on a crystal drift using temperature measurement.

What exactly they claim (claim 1)

1. User equipment, comprising: a transceiver; a temperature sensor; and processing circuitry coupled to the transceiver, the processing circuitry configured to receive an indication of a time shift associated with a channel based on a crystal drift, the crystal drift associated with a temperature based on the temperature sensor and a synchronization signal, the synchronization signal based on a first set of data samples of a first signal transmitted using the channel, wherein the channel is associated with a beam emitted by a communication node, adjust a second set of data samples of a second signal based on a frequency shift associated with the channel and the time shift, and transmit, from the transceiver, the second signal to the communication node using the channel associated with the beam.

Facts

Company
Apple (Apple Inc.)
Official title
Systems and methods to conform transmission to regulatory restrictions in wireless communications
Patent number
US12744562B2
Application number
17933239
Filed
Sep 19, 2022
Granted
Sep 22, 2026
Inventors
10
Claims
20

Classified under

H04B 7/01 Electricity & electronicsH04W 56/001 Electricity & electronicsH04W 64/00 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.