TV Receiver Configurable Filter Interference Suppression

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Solution Overview

Problem

The increasing demand for the electromagnetic spectrum and changes in frequency allocations between terrestrial TV and mobile telecommunications lead to interference issues for TV receivers, making it difficult for them to detect and receive TV signals due to overlapping frequency bands and reduced guard bands.

Innovation Solution

A TV receiver with a configurable filter and controller that suppresses interfering signals by inferring their presence from undetected TV channels, allowing for reliable TV channel detection without prior knowledge of the interfering signal's location or characteristics, and optionally using service information to configure the filter.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If frequency allocations for mobile telecommunications are expanded into traditionally allocated TV frequency bands, then mobile telecommunications capacity and revenue are improved, but TV signal reception reliability deteriorates due to increased interference

Engineering Contradiction:

Improvemobile telecommunications capacityVSAvoidTV signal reception

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The frequency band is segmented into multiple sub-channels or frequency bins, allowing the TV receiver to selectively process only those segments containing TV signals while filtering out segments occupied by mobile telecommunications signals. This segmentation enables coexistence by dividing the shared spectrum into manageable portions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filter applies different suppression characteristics to different frequency locations within the received signal band. By identifying specific frequency channels where mobile telecommunications signals are present, the filter applies targeted suppression only at those local frequency positions, preserving TV signal quality in unaffected channels.

Inventive Principle:

Principle #3Local quality

2Productivity

If guard bands between frequency bands are decreased to increase spectrum utilization, then spectrum efficiency is improved, but interference between TV and mobile telecommunications signals increases

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidsignal interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The configurable filter acts as an intermediary component between the received RF signal and the TV signal processing chain. It mediates the interaction between TV and mobile telecommunications signals by selectively attenuating interfering frequency components, allowing the system to operate with reduced guard bands while maintaining signal integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If a configurable filter is added to suppress interfering signals, then TV channel detection reliability is improved, but device complexity increases

Engineering Contradiction:

ImproveTV channel detectionVSAvoidreceiver structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The configurable filter is designed to perform multiple functions: it suppresses mobile telecommunications signals, filters out other interfering signals, and can be dynamically reconfigured for different frequency allocations. This multi-functionality justifies the added complexity by providing comprehensive interference rejection across various operating conditions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system includes automatic detection and configuration capabilities that identify the presence of mobile telecommunications signals and automatically adjust the filter parameters without requiring manual intervention. This self-service approach reduces the operational complexity despite the added hardware components.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively reduces interference from adjacent and out-of-band signals, ensuring reliable TV channel detection across varying frequency allocations and geographical regions, even when frequency allocations change dynamically.

Implementation Method 1

The configurable filter is configurable to suppress signals received from one or more of the plurality of frequency channels within the predetermined bandwidth

Methodology Applied

Scientific EffectFrequency filtering: Filter (electronic)

Data Source

PatentUS8780277B2Television receiver, television controller circuitry and method

Publication Date: 2014.07.15 SONY GROUP CORP

AI summary

A television receiver for receiving TV signals when unknown interference is present in a predetermined bandwidth in which the TV signals are transmitted. The TV receiver comprises an input, a tuner, a configurable filter and a controller circuitry. The input receives a radio frequency (RF) signal comprising the terrestrial TV signals. The tuner is configured to detect the terrestrial TV signals, where the terrestrial TV signals include a plurality of frequency channels within a predetermined bandwidth and the plurality of frequency channels provide TV signals which communicate TV channels. The configurable filter is configurable to suppress signals received from one or more of the plurality of frequency channels within the predetermined bandwidth. The controller circuitry is operable to form a channel map of the TV channels detected by the tuner for selection by a user of the television set and consequent upon a TV channel not being detected on a frequency channel, configure the frequency domain filter to suppress signals received from the frequency channel.