Wireless Communication System Using Integrated Training Signal Sequence
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Solution Overview
Problem
Conventional wireless communication systems face efficiency issues with short packet lengths, particularly in regions of low carrier-to-noise power ratio (CNR), leading to deteriorated bit error rates and transmission efficiency due to the need for lengthy training signals and separate synchronization processes.
Innovation Solution
A wireless communication system that uses a common training signal sequence for carrier recovery, symbol timing recovery, and frame synchronization, with pilot signals inserted at fixed intervals, enabling precise carrier frequency estimation and synchronization even with short packets, and improving bit error rates in low CNR conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate training signals and synchronization processes are used for carrier recovery, symbol timing recovery, and frame synchronization, then each function can be performed independently, but the overall transmission efficiency deteriorates and bit error rate increases in low CNR conditions
Solution Approach 1:
The patent combines separate training signals for carrier recovery, symbol timing recovery, and frame synchronization into a single integrated training signal sequence. This merging eliminates redundant signal elements and reduces the total training signal length, thereby improving transmission efficiency while maintaining reliable synchronization functions in low CNR environments.
Solution Approach 2:
The integrated training signal sequence is designed to serve multiple functions simultaneously: carrier frequency estimation, symbol timing recovery, and frame synchronization. This multi-functional approach allows a single signal structure to replace multiple separate signals, reducing overhead and improving transmission efficiency without compromising any individual synchronization function.
2Measurement precision
If lengthy training signals are used to maintain synchronization accuracy, then carrier frequency estimation precision is improved, but the transmission efficiency deteriorates due to increased signal overhead
Solution Approach 1:
The patent merges multiple training signal functions into a single integrated sequence that achieves accurate carrier frequency estimation without requiring excessive length. By combining carrier recovery, symbol timing, and frame synchronization functions into one optimized sequence, the patent reduces the training signal overhead while maintaining estimation precision.
Solution Approach 2:
The patent optimizes the parameters of the integrated training signal sequence, including the number of pilot signals, their spacing, and the sequence structure, to achieve the minimum necessary length for accurate carrier frequency estimation. This parameter optimization ensures sufficient precision while minimizing the signal overhead that would otherwise reduce transmission efficiency.
3Reliability
If multiple separate synchronization processes are implemented, then each synchronization function can be optimized independently, but the device complexity and processing overhead increase
Solution Approach 1:
The patent implements a universal training signal sequence that performs carrier recovery, symbol timing recovery, and frame synchronization simultaneously. This multi-functional design reduces the number of separate processing modules needed, thereby simplifying the overall device complexity while maintaining accurate synchronization through integrated processing.
Solution Approach 2:
The patent merges multiple independent synchronization processes into a single integrated processing flow that uses the combined training signal sequence. This consolidation reduces the number of separate processing steps and modules, simplifying the device architecture and reducing processing overhead while maintaining the accuracy of each individual synchronization function.
Data Source
AI summary
A wireless transmitting apparatus inserts a training signal into a transmission burst at fixed symbol intervals as a pilot signal, a wireless receiving apparatus performs AD conversion of a received burst signal, performs symbol timing recovery, performs frame position detection and pilot signal extraction from the received burst signal for which symbol timing was established, performs frame synchronization, and performs a carrier frequency estimation using pilot signal. A carrier frequency estimation is also performed with respect to a received burst signal for which frame synchronization was established, and channel distortion is estimated and output based on a frequency-corrected received burst signal. Channel distortion estimation is then performed with respect to a frequency-corrected received burst signal, and a data symbol sequence of the channel-compensated received burst signal is converted to a received data bit stream.