Optical space communication device and optical space communication method

The optical space communication device and method utilize distinct spreading codes for asynchronous optical axis alignment and signal detection, addressing the need for synchronized timing in existing techniques, enabling efficient and seamless transitions between alignment and communication phases.

JP2026017243APending Publication Date: 2026-02-04NEC CORP
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Patent Information

Application Number
JP2024117994
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-23
Publication Date
2026-02-04

AI Technical Summary

Technical Problem

Existing optical axis alignment techniques in free-space optical communication require synchronized timing between communication devices, which can be cumbersome and inefficient.

Method used

An optical space communication device and method that uses distinct spreading codes for aligning the optical axis and detecting signals, allowing asynchronous alignment without synchronized timing by employing a reflector and different codes for optical axis alignment and communication.

Benefits of technology

Enables optical axis alignment without synchronizing timing between devices, facilitating smooth transitions between alignment and communication operations, reducing the need for complex synchronization mechanisms, and minimizing hardware adjustments.

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Abstract

To provide an optical space communication device capable of starting optical axis alignment without matching timing between optical space communication devices.SOLUTION: An optical space communication device includes transmission means for transmitting a first signal for optical axis alignment with another optical space communication device including a reflector, the first signal being modulated using a first spreading code, and reception means for detecting, from a received optical signal, a reflected signal of the first signal reflected by the reflector of the other optical space communication device using the first spreading code, and detecting, from the received optical signal, a second signal for optical space communication transmitted from the other optical space communication device using a second spreading code different from the first spreading code.SELECTED DRAWING: Figure 1
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