Interference Suppression Using Non-Listened Base Station Estimates
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Solution Overview
Problem
In WCDMA wireless communication systems, multiple access interference (MAI) and multipath interference hinder the ability of mobile communication devices to decode signals effectively, as they receive signal energy from both serving and non-serving base transceiver stations, leading to noise that interferes with desired signals.
Innovation Solution
A method and system for interference suppression using information from non-listened base stations, where circuits in wireless communication devices generate estimate signals for undesired signals from non-listened BTSs, and dynamically allocate resources to process both desired and undesired signals, ultimately producing an interference-suppressed version of the raw signal to recover the desired signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless communication device receives signals from multiple base transceiver stations concurrently, then the spectrum utilization increases and more users can communicate, but multiple access interference and multipath interference increase, degrading signal decoding accuracy
Solution Approach 1:
The patent generates estimate signals for undesired signals from non-listened BTSs and converts this harmful interference into useful information by subtracting it from the raw signal. This transforms the harmful MAI and multipath interference into a benefit by enabling accurate recovery of desired signals while maintaining high spectrum utilization
Solution Approach 2:
The patent extracts and removes the harmful interference components from the received signal by generating estimate signals for undesired signals from non-listened BTSs and subtracting them. This separation allows the desired signals to be recovered with high accuracy while maintaining concurrent transmissions from multiple BTSs
2Reliability
If the device processes signals from both serving and non-serving base stations, then interference suppression is achieved, but the device complexity increases due to additional signal processing requirements
Solution Approach 1:
The patent segments the signal processing into distinct portions: one for processing desired signals from serving BTSs and another for generating estimate signals of undesired signals from non-listened BTSs. This segmentation manages complexity by organizing the interference suppression process into modular, manageable components
Solution Approach 2:
The patent performs preliminary action by generating estimate signals for undesired signals before they interfere with the desired signal recovery. This advance preparation of interference estimates enables effective suppression while maintaining organized, manageable processing steps
Data Source
AI summary
Aspects of a method and system for interference suppression using information from non-listened base stations are provided. A wireless communication device may be operable to receive a raw signal comprising one or more desired signals from one or more serving base transceiver stations (BTSs) and comprising one or more undesired signals from one or more non-listened BTSs. The wireless communication device may be operable to generate first estimate signals that estimate the one or more undesired signals as transmitted by the one or more non-listened BTSs, generate an interference suppressed version of the raw signal based on the first estimate signals, and recover the one or more desired signals from the interference suppressed version of the raw signal. The non-listened BTSs may comprise one or more BTSs that are not serving the wireless communication device and are not involved in a hand off of the wireless communication device.