Receiver Circuit Blocks Preamble Detection Power Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing receivers in battery-powered radio networks, such as those following the IEEE 802.15.4 standard, face challenges in reducing power consumption while maintaining sensitivity and performance, particularly during the detection of preambles where continuous operation is not necessary.
Innovation Solution
A method and receiver design that alternately turns on and off circuit blocks in the receive path, with a controller adjusting the turn-on and turn-off durations based on measured signal strengths, allowing for reduced power consumption during preamble detection by terminating the turn-off when a valid signal is detected, thereby optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circuit blocks in the receive path are continuously turned on for preamble detection, then detection sensitivity and performance are maintained, but power consumption increases significantly
Solution Approach 1:
The patent implements periodic action by alternately turning on and off circuit blocks in the receive path during preamble detection. The controller activates circuit blocks for a turn-on duration to detect preambles, then deactivates them for a turn-off duration, creating a cyclic on-off pattern that reduces average power consumption while maintaining detection capability through repeated sampling throughout the preamble sequence.
Solution Approach 2:
The patent applies dynamics by making the operational state of circuit blocks adjustable rather than fixed. The controller dynamically controls the turn-on and turn-off durations of circuit blocks based on detection needs, allowing the system to adapt the active state to actual preamble detection requirements and optimize the balance between power consumption and detection performance.
2Use of energy by moving object
If the turn-off duration is extended to reduce power consumption, then average power usage decreases, but the ability to detect preambles within the preamble time window is compromised
Solution Approach 1:
The patent applies partial action by turning on circuit blocks only for the necessary turn-on duration required for effective preamble detection, rather than continuously. The controller calculates and implements turn-on durations that are sufficient for detection but shorter than continuous operation, thereby reducing power consumption while maintaining adequate detection reliability through multiple partial detection cycles.
3Reliability
If the turn-on duration is increased to improve detection reliability, then preamble detection accuracy improves, but power consumption increases
Solution Approach 1:
The patent implements feedback by having the controller monitor preamble detection results and adjust turn-on durations accordingly. Based on whether preambles are successfully detected during previous turn-on periods, the controller modifies subsequent turn-on durations to optimize the balance between detection accuracy and power consumption, reducing unnecessary extended activation while ensuring adequate detection when needed.
Data Source
AI summary
A receiver and method for operating a receiver, in particular of a radio network, is provided, whereby the receiver includes circuit blocks in a receive path for detecting a preamble of a received signal, and a controller for controlling a receive mode. Whereby at least some of the circuit blocks are designed to be capable of being turned on for a turn-on duration and turned off for a turn-off duration. Whereby, the controller is configured to alternately turn on at least some of the circuit blocks for the turn-on duration and off for the turn-off duration during the receive mode, wherein the turn-off duration is shorter than the preamble. Whereby, the controller is configured to compare a first measured value measured in the receive path to a first threshold, and the controller is configured to change the turn-on duration and/or the turn-off duration on the basis of a result of the comparison with the first threshold, and whereby the controller is configured to compare a second measured value to a second threshold in order to detect a valid signal of the preamble and, on the basis of a result of the comparison with the second threshold, to terminate the turn-off and to drive the portion of the circuit blocks into a turned-on state for a synchronization by means of the preamble.