Multicarrier Radio Receiver Interference Cancellation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-carrier radio communications systems, existing receivers face significant computational resource challenges in continuously calculating power delay profiles for all cells, particularly for secondary carriers, which is necessary for effective interference cancellation.
Innovation Solution
A method where associations between cells on primary and secondary carriers are determined based on initial power delay profile calculations, allowing the use of the primary carrier's power delay profile for interference cancellation, thereby eliminating the need for repeated calculations on secondary carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power delay profiles are calculated for all cells on all carriers continuously, then interference cancellation performance is improved, but computational resource consumption increases significantly
Solution Approach 1:
The patent merges the power delay profile calculations for cells on primary and secondary carriers by establishing associations between them. Instead of calculating separate PDPs for all cells, the system calculates PDPs for associated cell groups and reuses them across carriers, reducing computational redundancy while maintaining interference cancellation effectiveness
Solution Approach 2:
The patent performs preliminary association determination between cells on primary and secondary carriers based on initial power delay profile calculations. This preliminary action enables the system to reuse calculated PDPs for associated cells across different carriers, avoiding repeated computational operations while ensuring accurate interference cancellation
2Measurement precision
If power delay profiles are calculated for all cells continuously, then interference cancellation accuracy is improved, but processing time increases
Solution Approach 1:
The patent combines the processing of power delay profiles for multiple carriers by establishing cell associations between primary and secondary carriers. This merging allows the system to process PDPs once for associated cell groups and reuse them, significantly reducing processing time while maintaining measurement precision for interference cancellation
Solution Approach 2:
The patent performs preliminary association determination between cells on different carriers based on initial PDP calculations. This preliminary classification enables efficient reuse of PDP data across carriers, reducing the time required for continuous processing while preserving the accuracy needed for effective interference cancellation
Data Source
AI summary
A radio receiver receives multiple radio frequency (RF) carriers where each RF carrier corresponds to a logical entity or object used in multi-carrier communications called a cell. A receiving radio node receives signals on serving cells, including a serving cell on a primary carrier and a serving cell on a secondary carrier, and on neighboring cells, including a neighboring cell on the primary carrier and a neighboring cell on the secondary carrier. Initially, a power delay profile is calculated for each of the serving cells and the neighboring cells. An association is determined between at least one cell on the primary carrier and at least one cell on the secondary carrier based on the calculated power delay profiles. The association is then later used in performing interference cancellation in the radio node.