Channel Estimation in Burst Mode Wireless Systems
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 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, then synchronization accuracy is improved, but channel estimation reliability deteriorates due to insufficient symbols
Solution Approach 1:
The patent applies multi-functionality by enabling frame synchronization symbols to serve dual purposes: maintaining their primary synchronization function while simultaneously being reused for channel estimation in burst mode transmissions. This allows the same symbols to contribute to both synchronization accuracy and channel estimation reliability without requiring additional dedicated symbols
2Measurement precision
If more symbols are allocated to channel estimation, then channel estimation accuracy is improved, but the number of symbols available for other purposes decreases
Solution Approach 1:
The patent implements self-service by having the frame synchronization symbols serve themselves dual functions. Instead of requiring separate dedicated channel estimation symbols that would reduce overall symbol utilization, the existing synchronization symbols are reused for channel estimation, allowing the system to improve channel estimation accuracy without sacrificing productivity or requiring additional overhead
3Reliability
If frame synchronization symbols are reused for channel estimation, then channel estimation reliability is improved, but synchronization accuracy may deteriorate
Solution Approach 1:
The patent applies merging by combining the functions of frame synchronization and channel estimation into a unified process. The frame synchronization symbols are processed to extract both synchronization information and channel estimation information simultaneously, allowing both functions to be performed with the same symbols without compromising either accuracy or reliability
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, resulting in improved signal reception and transmission efficiency across multiple frequency bands.
Implementation Method 1
combining the first set of frame synchronization symbols and the second set of channel estimation symbols to determine a channel estimate for the received packet
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 channel estimates or channel observables can be combined to compute a refined channel estimate, for example, when the channel estimates or channel observables are from the same channel.