Wireless Signal Decoding by Combining Repeated Frame Prefix Symbols
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Solution Overview
Problem
Conventional wireless communication systems, particularly those using OFDM/OFDMA schemes, face challenges in maintaining superior reception performance for DL_Frame_Prefix information transmitted through the FCH, leading to potential loss of important data reception information across varying channel environments.
Innovation Solution
A method and apparatus that involves receiving and decoding transmission signals by combining and averaging repeated symbols of the DL_Frame_Prefix information, which includes forming N-bit blocks, encoding, interleaving, and reconfiguring them to improve reception performance by reducing information loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional decoding method is used for DL_Frame_Prefix information, then device complexity is low, but reception performance deteriorates in unfavorable channel environments
Solution Approach 1:
The patent combines multiple received DL_Frame_Prefix symbols through averaging before decoding. Specifically, the receiver collects multiple instances of the DL_Frame_Prefix information transmitted in different frames, averages these symbols to reduce noise and interference effects, and then performs decoding on the combined result. This merging approach improves reception reliability in unfavorable channel environments by leveraging redundancy across multiple transmissions.
Solution Approach 2:
The patent performs averaging of received symbols before the decoding process. By pre-processing the received DL_Frame_Prefix information through averaging across multiple frames, the system prepares a cleaner, more reliable signal input for the decoder, thereby improving overall reception performance without significantly increasing decoding complexity.
2Loss of information
If DL_Frame_Prefix information is transmitted early in frame, then information availability for subsequent reception is improved, but information loss occurs in poor channel conditions
Solution Approach 1:
The patent changes the processing parameter by applying averaging operation on the received DL_Frame_Prefix symbols before decoding. This parameter change in the signal processing domain transforms multiple noisy observations into a single averaged estimate with reduced variance, thereby preventing information loss and improving reliability in poor channel conditions.
3Reliability
If repeated symbols are combined and averaged before decoding, then reception performance is improved, but processing time increases
Solution Approach 1:
The patent applies partial averaging by combining a limited number of DL_Frame_Prefix symbols from multiple frames rather than accumulating all possible instances indefinitely. This partial action approach achieves sufficient reception performance improvement while controlling the processing time and computational burden, avoiding excessive processing requirements.
Data Source
AI summary
Disclosed is a method and an apparatus for decoding transmission signal. The method includes the steps of: receiving transmission signal including repeated symbols; deinterleaving the received signal; mutually combining the repeated symbols in the deinterleaved signal; and decoding the combined symbols. According to the method, reception performance is improved as compared to a conventional decoding method, and system performance is improved by reducing the loss of frame information included in an FCH.