Communication device, communication method, and communication system

By correcting Doppler frequency shifts in wireless communication, the solution addresses frequency-related challenges, enabling cost-effective and miniaturized satellite communication systems for long-distance communication.

JP7708101B2Active Publication Date: 2025-07-15SONY GROUP CORP
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Patent Information

Application Number
JP2022528466
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-06-04
Filing Date
2021-04-09
Publication Date
2025-07-15
Estimated Expiration
2041-04-09

AI Technical Summary

Technical Problem

Existing wireless communication technologies face challenges in long-distance communication due to frequency shifts caused by the Doppler effect, which increase heat generation and complexity in reception processes, leading to higher costs and limitations in miniaturization and cost reduction of satellite-based communication systems.

Method used

A communication device and method that calculates and corrects for Doppler frequency shifts by determining transmission time and frequency based on satellite position and movement, allowing terminals to transmit wireless frames using corrected frequencies to reduce frequency shifts and simplify reception processes.

Benefits of technology

This approach reduces frequency shifts and simplifies reception processes, enabling miniaturization and cost-effective satellite communication systems, facilitating multiple satellite launches and expanded civilian use.

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Abstract

Provided is a communication device that performs long-distance wireless communication with a communication partner moving at high speed.　The communication device comprises a determination unit for determining the transmission time and transmission frequency of a wireless frame, an estimation unit for estimating a change of wireless resources of the wireless frame in a receiving station, and a transmission unit for transmitting the wireless frame. The receiving station is a satellite orbiting the earth in a prescribed orbit, and the estimation unit estimates a Doppler frequency generated by satellite movement from the position information of the satellite at the transmission time. The transmission unit transmits the wireless frame using a transmission frequency corrected using the Doppler frequency.
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Citation Information

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