Mobile Receiver Adaptation Using Propagation Environment Information
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Solution Overview
Problem
Wireless cellular communication devices face challenges in adapting to dynamic propagation environments, particularly in dense urban areas where new propagation paths can cause interference, requiring quick identification and adjustment of receiver parameters to maintain signal quality without excessive computational expense and battery drain.
Innovation Solution
The method involves determining propagation environment information at a mobile device's processor to configure receiver algorithms and control parameters, using techniques like Fast Fourier Transform window positioning and path tracking algorithms optimized for the current environment, and obtaining this information through cell identifiers, lookup tables, and external databases to minimize interference and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver continuously monitors and tracks all propagation paths to quickly identify new paths and prevent interference, then the receiver performance and signal quality are improved, but the computational complexity and power consumption increase
Solution Approach 1:
The system pre-determines propagation environment information (such as building layouts, reflector positions, and expected propagation paths) before actual signal reception. This preliminary characterization allows the receiver to anticipate where new propagation paths might appear and pre-configure tracking parameters, reducing the need for continuous full-spectrum monitoring and thereby lowering power consumption while maintaining reliable path tracking
Solution Approach 2:
The receiver dynamically adjusts its monitoring and tracking behavior based on the determined propagation environment characteristics. In environments with stable propagation paths, the receiver reduces monitoring intensity to save power. When new paths are detected or environmental changes are anticipated, the receiver increases tracking aggressiveness, creating a dynamic balance between performance and power consumption
2Adaptability or versatility
If the receiver uses aggressive path tracking and frequent monitoring to quickly adapt to new propagation paths, then the adaptability and interference mitigation are improved, but the device complexity and computational expense increase
Solution Approach 1:
Propagation environment information including expected path locations, reflector positions, and environmental characteristics is determined in advance. This preliminary analysis enables the receiver to focus computational resources on specific regions of interest in the signal spectrum, rather than performing exhaustive searches across all possible paths, thereby reducing computational complexity while maintaining high adaptability
Solution Approach 2:
The receiver applies different tracking algorithms and monitoring intensities to different propagation paths based on their characteristics and importance. Critical paths (such as line-of-sight or strong reflected paths) receive more intensive tracking resources, while weaker or less important paths receive reduced monitoring, optimizing the balance between adaptability and computational complexity
Data Source
AI summary
A method and apparatus for receiver adaptation of a mobile device communicating with a network cell, the method determining propagation environment information at a processor of the mobile device; and configuring at least one of an algorithm and control parameters of a receiver of the mobile device utilizing the propagation environment information. Further, a method and apparatus for obtaining propagation environment information at a mobile device including: acquiring a cell identifier at the mobile device; and receiving propagation environment information corresponding to the acquired cell identifier.