Multi-band Power Amplifier for NSTR Multi-link Devices

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Solution Overview

Problem

Conventional Front End Modules (FEM) of Access Points (APs) require multiple Power Amplifiers (PAs) for multi-link operations, leading to cost inefficiencies, heat management issues, and potential power draw limitations.

Innovation Solution

A multi-band power amplifier for Non-Simultaneous Transmit and Receive (NSTR) multi-link devices is provided, utilizing a dual-band PA that supports carrier aggregation in Wi-Fi 7, optimizing Peak-to-Average Power Ratio (PAPR) and incorporating joint Crest Factor Reduction (CFR) and Digital Pre-Distortion (DPD) parameter selection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple Power Amplifiers are used for multi-link operations, then multi-link functionality is achieved, but device complexity and cost increase

Engineering Contradiction:
Improvemulti-link operation capabilityVSAvoidFEM complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a single power amplifier capable of operating across multiple frequency bands (2.4 GHz, 5 GHz, 6 GHz) by incorporating a multi-band filter that routes different frequency signals through the same PA. This universal design allows the AP to perform multi-link operations without requiring separate PAs for each band, thereby reducing device complexity and cost while maintaining versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple Power Amplifiers are used for multi-link operations, then multi-link functionality is achieved, but manufacturing cost increases

Engineering Contradiction:
Improvemulti-link operation capabilityVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent implements a single power amplifier capable of operating across multiple frequency bands (2.4 GHz, 5 GHz, 6 GHz) by incorporating a multi-band filter that routes different frequency signals through the same PA. This universal design allows the AP to perform multi-link operations without requiring separate PAs for each band, thereby reducing device complexity and cost while maintaining versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If multiple Power Amplifiers are used for multi-link operations, then multi-link functionality is achieved, but heat generation increases

Engineering Contradiction:
Improvemulti-link operation capabilityVSAvoidheat generation
Core Design Contradiction:
Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent implements a single power amplifier capable of operating across multiple frequency bands (2.4 GHz, 5 GHz, 6 GHz) by incorporating a multi-band filter that routes different frequency signals through the same PA. This universal design allows the AP to perform multi-link operations without requiring separate PAs for each band, thereby reducing device complexity and cost while maintaining versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If multiple Power Amplifiers are used for multi-link operations, then multi-link functionality is achieved, but power draw increases

Engineering Contradiction:
Improvemulti-link operation capabilityVSAvoidpower draw
Core Design Contradiction:
Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent implements a single power amplifier capable of operating across multiple frequency bands (2.4 GHz, 5 GHz, 6 GHz) by incorporating a multi-band filter that routes different frequency signals through the same PA. This universal design allows the AP to perform multi-link operations without requiring separate PAs for each band, thereby reducing device complexity and cost while maintaining versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250055745A1Multi-band power amplifier for non-simultaneous transmit and receive (NSTR) multi-link devices
Publication Date: 2025.02.13 CISCO TECHNOLOGY INC
  • US20250055745A1 patent drawing
  • US20250055745A1 patent drawing
  • US20250055745A1 patent drawing

AI summary

Crest Factor Reduction (CFR) parameters are determined for a dual band Power Amplifier (PA). A first band of the dual band PA is associated with a first Multi-Link Operation (MLO) link and a second band of the dual band PA is associated with a second MLO link. Determining the CFR parameters comprises determining based on a configuration of the first MLO link and the second MLO link. A first portion of the CFR parameters is provided to a first crest factor reduction block. First portion of the CFR parameters comprises a first clipping threshold associated with the first band and first filter coefficients associated with the first band. A second portion of the CFR parameters is provided to a second crest factor reduction block. The second portion of the CFR parameters comprises a second clipping threshold associated with the second band and second filter coefficients associated with the second band.