Adaptive Equalizer Power Control in Radio Base Station Receivers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radio communication systems with serially connected adaptive array antennas and equalizers, power consumption increases unnecessarily when there are no delay waves, and weight calculation becomes complex, leading to deteriorated signal quality due to non-converged weights.
Innovation Solution
A radio communication apparatus with a controller that compares signal qualities before and after stopping the adaptive equalizer's power supply, allowing the first output signal to be used when improvement is below a desired level, reducing power consumption and simplifying weight calculation without degrading signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adaptive equalizer keeps operating under radio communication environment including no delay wave, then the signal quality can be maintained, but power consumption of the receiver increases unnecessarily
Solution Approach 1:
The adaptive equalizer is designed to dynamically change its operational state based on the detected radio communication environment. When delay waves are detected, the equalizer operates actively to combine advancing and delay wave components. When no delay waves are present, the equalizer stops operating to save power. This dynamic adaptation resolves the contradiction between maintaining signal quality and reducing power consumption.
Solution Approach 2:
The system changes the operational parameter of the adaptive equalizer based on the presence or absence of delay waves. By detecting the radio communication environment and adjusting the equalizer's operation state accordingly, the system achieves both power savings when equalization is unnecessary and signal quality maintenance when equalization is beneficial.
2Reliability
If the adaptive equalizer operates continuously, then signal quality can be maintained, but the calculation in the weight calculator becomes complicated and convergence to optimum weights becomes difficult
Solution Approach 1:
The weight calculation process is made dynamic by conditionally executing equalization weight calculations only when delay waves are detected in the radio communication environment. When no delay waves are present, the system skips equalization weight calculations entirely, simplifying the overall calculation process while maintaining signal quality through adaptive array antenna processing alone.
Solution Approach 2:
The equalization weight calculation function is extracted as a separate, optional processing step that is only activated when needed. By separating the equalization weight calculation from the mandatory adaptive array antenna processing, the system can simplify calculations by omitting the equalization step when delay waves are absent, while still providing full equalization capability when required.
Data Source
AI summary
A radio base station (100) according to the present invention is equipped with a determination unit (150) that compares a first signal quality of a first output signal (y1[k]) which is output by an adaptive array antenna (110) and a second signal quality of a second output signal (y2[k]) which is output by an adaptive equalizer (120) and determines whether the improvement effect of the second signal quality with respect to the first signal quality is below expectation. When the determination unit (150) determines that the improvement effect is below expectation, a controller (160) stops power supply to the adaptive equalizer (120) and the calculation of an equalization weight (c*) by a weight calculator (140), and outputs the first output signal (y1[k]) as the output signal (Out) of a receiver (101).