Intermittent UWB Receiver RF Stage Control

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Solution Overview

Problem

Existing intermittent IR-UWB receivers consume excessive energy during the synchronization phase due to continuous operation of the RF stage, which is not efficient in terms of energy consumption.

Innovation Solution

A UWB impulse signal receiver with a rake processor and control module that operates the RF stage only during acquisition windows during the synchronization phase, allowing the RF stage to be powered off outside these windows, and adjusts the positions of the acquisition windows to cover the entire synchronization symbol duration, thereby reducing energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the RF stage operates continuously during the synchronization phase, then effective symbol detection and tracking are ensured, but energy consumption becomes excessive

Engineering Contradiction:

Improvesymbol detection effectivenessVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The RF stage operates periodically during acquisition windows rather than continuously. The control module activates the RF stage only during specific time intervals (acquisition windows) that are sufficient for detecting synchronization symbols, thereby reducing energy consumption while maintaining detection effectiveness.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The synchronization phase is divided into multiple acquisition windows separated by idle periods. Each acquisition window is a discrete time segment where the RF stage is activated to perform detection, allowing the system to segment the continuous operation into manageable periodic intervals.

Inventive Principle:

Principle #1Segmentation

2Use of energy by moving object

If the RF stage is powered off outside acquisition windows, then energy consumption is reduced, but continuous monitoring capability is lost

Engineering Contradiction:

Improveenergy consumptionVSAvoidsignal detection capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The control module预先 determines the timing and positions of acquisition windows based on expected signal characteristics. By preparing the detection schedule in advance, the system ensures that the RF stage is activated at the most critical moments for signal detection, maintaining reliability while enabling power savings during non-critical periods.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system employs periodic acquisition windows at strategically chosen intervals during the synchronization phase. This periodic operation ensures that the RF stage is active when synchronization symbols are most likely to occur, maintaining detection capability while reducing overall energy consumption compared to continuous operation.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS9768827B2Intermittent UWB receiver

Publication Date: 2017.09.19 COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

AI summary

A UWB impulse receiver including an RF stage followed by a baseband processing stage. The baseband processing stage includes a Rake filter including a plurality of time fingers, each finger including an integrator of the baseband signal during an acquisition window, a control module, and a detection module estimating the received symbols from the integration results. During a synchronization phase, the control module drives respective positions of the acquisition windows associated with the different fingers, to scan at a reception interval, the RF stage only operating, in a course of the synchronization phase, during the plurality of acquisition windows.