Rake Receiver Finger Reduction via Power Adjustment
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Solution Overview
Problem
Conventional wireless communication systems face high power consumption due to the processing demands of rake fingers in rake receivers, especially in scenarios with high traffic and multipath interference, where reducing rake finger processing is necessary to minimize power consumption.
Innovation Solution
A method to reduce the number of fingers in a rake receiver by determining the captured energy before and after increasing transmit power, ensuring that the energy after the increase is greater than or equal to the initial energy, thereby optimizing the number of fingers needed for processing, which can be based on a desired reduction in receive power consumption, signal-to-interference-and-noise ratio, or multipath power profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of rake fingers is increased to handle high traffic and multipath interference, then the signal reception quality is improved, but the power consumption increases significantly
Solution Approach 1:
The patent implements dynamic adjustment of the number of active rake fingers based on real-time channel conditions and traffic requirements. The system transitions from a static finger configuration to a dynamic one where fingers are activated or deactivated according to multipath interference levels and signal quality metrics, thereby optimizing the balance between reception quality and power consumption.
Solution Approach 2:
The system changes operational parameters by adjusting the number of active rake fingers based on measured channel conditions. When multipath interference is high or traffic demand increases, additional fingers are activated to improve signal reception. When conditions improve, fingers are deactivated to reduce power consumption,实现ing parameter-based optimization of the receiver configuration.
2Reliability
If transmit power is increased to maintain signal quality, then the signal-to-noise ratio is improved, but the interference to other subscriber stations increases
Solution Approach 1:
The patent implements a feedback mechanism where the receiver measures the quality of received signals and the transmitter adjusts its power accordingly. By using rake finger processing to capture multipath energy and provide accurate signal quality measurements, the system can feedback this information to adjust transmit power levels, maintaining signal-to-noise ratio while minimizing excessive interference to other users through closed-loop power control.
3Use of energy by moving object
If rake finger processing is reduced to decrease power consumption, then the energy efficiency is improved, but the ability to handle multipath interference deteriorates
Solution Approach 1:
The patent applies partial action by activating only the necessary number of rake fingers required to handle the current multipath conditions, rather than keeping all fingers active. This partial activation approach reduces power consumption while maintaining sufficient capability to handle multipath interference. The system determines the minimum number of fingers needed based on channel conditions and activates only those, avoiding excessive processing.
Data Source
AI summary
Systems and techniques are disclosed relating to reducing the number of fingers in a rake receiver used for rake finger processing in wireless networks. Determining Ebefore, captured energy of all fingers before increasing transmit power. Increasing transmit power by a delta transmit power. Determining Eafter, captured energy of i fingers. Determining i fingers needed for processing, such that Eafter is essentially greater than or equal to Ebefore.