Wireless Receiver Diversity Branch Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless receivers face increased computational cost and power consumption due to the complexity of spatial receive diversity, which diminishes performance gains as correlation between diversity channels increases, especially in mobile terminals.
Innovation Solution
A wireless receiver that dynamically selects a subset of diversity branches based on estimated channel parameters, such as signal-to-disturbance ratio and correlation, to optimize performance and reduce complexity, using software-based signal processing to adjust dimensionality and reduce unnecessary processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial receive diversity is implemented with multiple antennas, then error performance is improved, but computational complexity and power consumption increase
Solution Approach 1:
The patent implements dynamic selection of diversity branches based on real-time channel conditions. The receiver evaluates channel parameters such as correlation coefficients and signal-to-noise ratios, then adaptively selects an optimal subset of diversity branches. This dynamic approach allows the system to maintain high error performance when diversity is beneficial while reducing computational complexity when channels are highly correlated, directly resolving the technical contradiction between reliability and device complexity.
2Reliability
If all diversity branches are processed, then diversity gain is maximized, but power consumption increases
Solution Approach 1:
The patent extracts and processes only the essential diversity branches that contribute meaningfully to performance improvement. By evaluating channel correlation metrics and selecting only those branches with sufficient independence and signal quality, the system discards redundant processing of highly correlated branches. This extraction principle maintains diversity gain from the most valuable branches while eliminating unnecessary power consumption from processing redundant signals.
3Measurement precision
If diversity processing dimensionality is increased, then signal detection accuracy is improved, but processing cost increases
Solution Approach 1:
The patent applies partial action by processing only a selected subset of diversity branches rather than all available branches. The system calculates channel parameters for all branches but selectively applies diversity combining only to those branches that meet predetermined criteria for signal quality and correlation thresholds. This partial processing approach maintains sufficient detection accuracy for reliable communication while significantly reducing the computational cost associated with processing all possible branches.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A wireless receiver and corresponding method for receiving a signal transmitted by a transmitter. The receiver comprises: a plurality of antennas each for receiving a version of the signal via a different propagation channel and providing that version at a respective input, and signal processing means configured to operate diversity processing of a supplied number of the inputs for use in performing detection of the signal. The receiver further comprises: channel parameter estimation means configured to estimate one or more channel parameters on the propagation channels; and selection means configured to select only a subset of the inputs to implement a specific dimensionality of the receiver diversity processing, in dependence on the one or more channel parameters indicative of channel conditions on the propagation channels.