Transmitting device and transmitting method

By decomposing baseband signals and aligning phases in the transmitter, the technology reduces PAPR and enhances amplification efficiency in wireless communication, addressing the limitations of conventional methods.

JP7647993B2Active Publication Date: 2025-03-18NIPPON TELEGRAPH & TELEPHONE CORP
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Patent Information

Application Number
JP2024502261
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-02-22
Publication Date
2025-03-18
Estimated Expiration
2042-02-22

AI Technical Summary

Technical Problem

Conventional wireless transmission technologies face challenges in reducing the Peak to Average Ratio (PAPR) of transmitted signals while maintaining efficient amplification, especially in long-distance cellular communication where uplink transmission with small power is a significant issue.

Method used

The technology employs a signal processor for MIMO multiplexing and a transmitter that decomposes baseband signals into multiple signals, assigning one RF chain to each, and aligns the phases of modulated signal vectors to reduce PAPR without increasing the number of amplifiers.

Benefits of technology

This approach effectively reduces the PAPR of transmitted signals, enhancing amplification efficiency and supporting long-distance wireless communication without the need for additional amplifiers.

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Abstract

A transmission device comprising: a signal processing unit that processes a baseband signal so as to use MIMO multiplex transmission; and a transmission unit that decomposes the baseband signal corresponding to one MIMO layer into a plurality of signals, assigns one RF chain to each of the decomposed plurality of signals, and transmits the plurality of signals.
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