Channel Estimation via Synchronization Symbol Reuse
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Solution Overview
Problem
Frequency-hopped wireless communication systems face challenges in channel estimation due to limited symbols available for channel estimation, leading to inadequate signal compensation for multipath interference and frequency offsets, especially in multi-band transmissions.
Innovation Solution
The method involves reallocating or reusing frame synchronization symbols to augment channel estimation symbols, allowing for a greater number of symbols to be used for channel estimation per frequency band, and combining these symbols through Fourier transformation to improve channel estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frame synchronization symbols are dedicated solely to synchronization functions, then synchronization accuracy is maintained, but channel estimation accuracy deteriorates due to insufficient symbols
Solution Approach 1:
The patent applies multi-functionality by enabling frame synchronization symbols to serve dual purposes: maintaining their original synchronization function while simultaneously being reused for channel estimation. This allows the same symbols to contribute to both synchronization accuracy and channel estimation accuracy, resolving the contradiction between having sufficient symbols for channel estimation and maintaining synchronization reliability
2Measurement precision
If more symbols are allocated to channel estimation, then channel estimation accuracy improves, but the number of symbols available for other functions decreases
Solution Approach 1:
The patent applies self-service by having the frame synchronization symbols serve themselves for channel estimation without requiring additional dedicated channel estimation symbols. The synchronization symbols inherently contain the necessary information to contribute to channel estimation, eliminating the need for separate resource allocation and reducing overall system complexity
3Quantity of substance
If frame synchronization symbols are reused for channel estimation, then channel estimation resources increase, but the complexity of symbol processing increases
Solution Approach 1:
The patent applies merging by combining the processing of frame synchronization symbols with channel estimation processing. Instead of treating them as separate operations requiring separate processing chains, the method integrates both functions into a unified processing approach where synchronization symbols are simultaneously used for both purposes, reducing overall processing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances channel estimation reliability and frequency offset removal, leading to improved signal reception and reduced interference across multiple frequency bands, even in scenarios with limited channel estimation resources.
Implementation Method 1
The combining operation might include in one embodiment averaging the symbols for a given frequency band. The method might further include performing a Fourier transformation on the symbols prior to combining the symbols.
Data Source
AI summary
The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more synchronization and channel estimate symbols can be combined to compute a refined channel estimate.