Multi-Sector Hub Interference Cancellation Parameters

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Solution Overview

Problem

Wireless communication systems face interference issues when multiple transceivers transmit simultaneously, leading to signal degradation and reduced network efficiency, as existing solutions like time partitioning, frequency differentiation, and coding methods are not fully effective in canceling out interference across multi-sector transceivers.

Innovation Solution

A method and system for calculating and applying transmit and receive interference cancellation parameters based on calibration factors to isolate desired signals, using equations such as Fxy=Tsecx⁢Rsecy⁢⁢x≠ywxyt=wyxr⁢Fxy, where wxyt and wyxr are interference cancellation parameters, and Fxy is a calibration factor, to generate interference cancellation signals and reduce unwanted signal reception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple transceivers transmit simultaneously on the same or adjacent frequencies, then network capacity and efficiency are improved, but interference between signals increases and signal quality deteriorates

Engineering Contradiction:

Improvenetwork capacityVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies interference cancellation techniques that convert harmful interference signals into beneficial information. By estimating and subtracting interference components from received signals, the system transforms what was previously harmful (simultaneous transmissions causing interference) into a manageable condition that allows higher network capacity. The interference cancellation parameters are calculated and applied to eliminate unwanted signals while preserving desired communications.

Inventive Principle:

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

2Reliability

If time partitioning is used to avoid interference, then signal quality is improved, but network capacity and transmission efficiency deteriorate due to dedicated time periods requirement

Engineering Contradiction:

Improvesignal qualityVSAvoidnetwork capacity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent employs preliminary calibration procedures to establish interference cancellation parameters before actual data transmission. During calibration, the system pre-characterizes the interference channels and calculates cancellation weights. This preliminary action enables subsequent simultaneous transmissions to proceed without time partitioning, as the interference has already been characterized and can be canceled in real-time, thus maintaining both signal quality and network capacity.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If frequency differentiation is used to reduce interference, then signal quality is improved, but available bandwidth and network capacity are reduced

Engineering Contradiction:

Improvesignal qualityVSAvoidbandwidth

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent utilizes parameter changes in the signal processing domain rather than frequency domain. By dynamically adjusting interference cancellation parameters (weights, coefficients) based on channel conditions and calibration data, the system maintains signal quality without requiring frequency separation. This allows full utilization of available bandwidth while achieving interference mitigation through mathematical parameter adjustment rather than physical frequency allocation.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If coding methods are used to differentiate signals, then interference resistance is improved, but system complexity and processing overhead increase

Engineering Contradiction:

Improveinterference resistanceVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where interference cancellation parameters are continuously refined based on received signal quality and calibration results. The system monitors transmission performance and adjusts cancellation weights accordingly, creating a closed-loop control system. This feedback approach provides robust interference resistance without requiring complex coding schemes, as the adaptive parameter adjustment automatically optimizes interference mitigation based on actual channel conditions.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS9197344B2Systems and methods for reducing interference in data communication networks

Publication Date: 2015.11.24 UBIQAM

AI summary

A computer-implemented method for calculating interference reducing parameters for cancelling wireless signal interference within a data communication network, comprising: per each of a plurality of antennas of a multi-sector hub communicating with a data communication network and with a corresponding transceiver of a plurality of distant transceivers: calculating a plurality of calibration factors based on values extracted from sequential transmission and reception of predetermined signals between each of the plurality of antennas of the multi-sector hub; calculating at least one receive interference cancellation parameter, to isolate desired signals transmitted by the corresponding distant transceiver from the undesired interference signals transmitted by other non-corresponding distant transceivers; calculating at least one transmit interference parameter for each non-corresponding antenna of the hub, based on the calculated receive interference cancellation parameters and the calibration factors; and generating the interference parameters for applying during operation of the multi-sector hub to generate interference cancellation signals.