Full-Duplex Wireless Receiver Compensation for Self-Interference

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Solution Overview

Problem

Existing wireless communication systems face challenges in achieving full duplex transmission due to self-interference from co-located antennas, which disrupt signal accuracy and hinder efficient use of licensed frequency bands, particularly in 5G systems.

Innovation Solution

Implementing a self-interference noise calculator with a network of processing elements to generate adjusted signals that compensate for interference, using bit manipulation, multiplication, and accumulation units to minimize errors in transmission and reception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If full duplex transmission is implemented using co-located antennas, then spectrum efficiency is improved, but self-interference from transmitting antennas disrupts signal accuracy

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidsignal accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies the principle of converting harm into benefit by using the transmitted signal itself to generate a compensation signal that cancels self-interference. The transmitting antenna's signal is processed through a noise calculator and compensation component to create an equal and opposite signal that neutralizes the harmful self-interference effect, thereby enabling full duplex transmission with maintained signal accuracy.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces intermediary components including a noise calculator and compensation component that mediate between the transmitting antenna and receiving antenna. These intermediaries process the transmitted signal to generate compensation signals that eliminate self-interference, allowing simultaneous transmission and reception without direct interference between antennas.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple antennas are used for simultaneous transmission and reception, then full duplex capability is achieved, but self-interference cancels received signals

Engineering Contradiction:

Improvefull duplex capabilityVSAvoidreceived signal cancellation

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent implements feedback mechanisms where the transmitted signal is continuously monitored and processed to generate real-time compensation signals. The noise calculator receives feedback about the transmitted signal characteristics and adjusts the compensation signal accordingly, ensuring continuous cancellation of self-interference throughout the communication process.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent converts the harmful self-interference signal into a beneficial compensation signal by processing the transmitted signal through the noise calculator and compensation component. This transformed signal equal and opposite to the self-interference is then applied to cancel the received signal cancellation effect, enabling full duplex capability.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If self-interference compensation is applied to all signals, then full duplex transmission is enabled, but processing complexity increases

Engineering Contradiction:

Improvefull duplex transmissionVSAvoidprocessing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the self-interference compensation process into distinct functional components: a noise calculator that processes transmitted signals, and compensation components that apply correction signals to receiving antennas. This segmentation allows each component to be optimized independently and simplifies the overall implementation of full duplex transmission.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies self-service principles by using the transmitting antenna's own signal to generate the compensation signal for self-interference cancellation. The system serves itself by processing its own transmitted signal to create the necessary compensation, eliminating the need for external interference sources or complex external processing systems.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250350509A1Wireless devices and systems including examples of full duplex transmission

Publication Date: 2025.11.13 LODESTAR LICENSING GROUP LLC

AI summary

Examples described herein include systems and methods which include wireless devices and systems with examples of full duplex compensation with a self-interference noise calculator. The self-interference noise calculator may be coupled to antennas of a wireless device and configured to generate adjusted signals that compensate self-interference. The self-interference noise calculator may include a network of processing elements configured to combine transmission signals into sets of intermediate results. Each set of intermediate results may be summed in the self-interference noise calculator to generate a corresponding adjusted signal. The adjusted signal is received by a corresponding wireless receiver to compensate for the self-interference noise generated by a wireless transmitter transmitting on the same frequency band as the wireless receiver is receiving.