White Space Channel Adjacent Frequency Compensation

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Solution Overview

Problem

Existing white space technology struggles to meet established requirements for frequency selection, coverage, and output power, often resulting in reduced coverage due to interference from adjacent frequency authorized signals.

Innovation Solution

A method for optimizing white space utilization by enhancing adjacent frequencies, which involves compensating upper and/or lower adjacent frequencies to allow white space devices to operate at maximum transmit power without affecting adjacent frequency authorized signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If transmission power of white space is reduced to avoid interference with adjacent frequency authorized signals, then interference is avoided, but coverage of white space deteriorates

Engineering Contradiction:

Improveinterference to adjacent frequency authorized signalsVSAvoidcoverage of white space

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The patent applies preliminary anti-action by enhancing the adjacent frequency authorized signals before the white space transmission begins. Compensation devices are installed to amplify the adjacent frequency signals in advance, creating a stronger signal baseline that can withstand the presence of white space transmissions without requiring power reduction. This preemptive strengthening prevents the need to reduce white space power later.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The patent uses the counterweight principle by introducing compensation devices that amplify adjacent frequency authorized signals to counterbalance the potential harmful effects of white space transmissions. The compensation devices act as a counterforce, strengthening the authorized signals to offset the interference that would otherwise force power reduction and coverage limitation.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Reliability

If threshold for adjacent channel interference is set strictly to protect authorized signals, then authorized signals are protected, but available white space frequencies are reduced

Engineering Contradiction:

Improveprotection of authorized signalsVSAvoidavailability of white space frequencies

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by fundamentally altering the signal strength parameter of adjacent frequency authorized signals through compensation devices. By changing the amplitude/Power parameter of the authorized signals to a higher level, the system can tolerate stricter interference thresholds without limiting white space availability. The enhanced signal parameter creates a larger margin that accommodates both strict protection requirements and broader frequency utilization.

Inventive Principle:

Principle #35Parameter changes

3Area of stationary object

If transmission power of white space is increased to meet coverage requirements, then coverage is improved, but adjacent frequency authorized signals are interfered with

Engineering Contradiction:

Improvecoverage of white spaceVSAvoidinterference to adjacent frequency authorized signals

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent implements preliminary action by installing and configuring compensation devices that enhance adjacent frequency authorized signals before white space transmissions commence. This advance preparation ensures that when white space devices transmit at full power to achieve required coverage, the authorized signals are already strengthened and can withstand the interference without degradation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12267687B2Method of optimizing the utilization of the white space based on the enhancement of the adjacent frequencies

Publication Date: 2025.04.01 ANYWAVE COMM TECH

AI summary

A method of optimizing the utilization of white space based on the enhancement of the adjacent frequency, comprising: obtaining an available white space channel; and separately and correspondingly compensating an upper adjacent frequency and/or a lower adjacent frequency of the channel according to a relationship between the coverage of authorized signals of adjacent frequencies of the channel and the coverage of a white space device, the white space device obtain the maximum number of selectable channels and the maximum transmission power without affecting the authorized signals currently used in the adjacent frequencies; enhancing emission intensities of TV broadcast signals or other authorized signals of respective adjacent frequencies of a white space channel, a white space device operating over the white space channel meet the predetermined requirements of transmission power and coverage without adversely affecting the coverage and reception of authorized signals currently used in the adjacent frequencies.