Acoustic Encoder Sampling for Faster Noise-Resilient Data Transfer
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Solution Overview
Problem
Existing wireless communication systems using acoustic channels face inefficiencies in data transmission speed due to high redundancy for noise immunity, leading to slow data transfer and increased error rates, especially in varying noise environments.
Innovation Solution
The system employs a dual-channel encoding method where pseudorandom samples and control data are encoded with high redundancy, enabling error-free transmission of large information objects at increased speeds by iterative decoding, while dynamically adjusting to changing interference conditions using a precoder and spectrum correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high redundancy encoding is used to achieve noise immunity, then error-free reception probability increases, but transmission speed decreases significantly
Solution Approach 1:
The information object is divided into multiple data packets, each encoded with appropriate redundancy. This segmentation allows parallel transmission of multiple packets, increasing overall transmission speed while maintaining error-free reception through iterative decoding of individual packets.
Solution Approach 2:
The encoding redundancy is dynamically adjusted based on channel conditions. The system uses iterative decoding with adaptive stopping criteria, where decoding continues until error-free reception is achieved or a maximum iteration limit is reached, optimizing the balance between reliability and transmission speed.
2Adaptability or versatility
If feedback mechanism is implemented for adjusting transmission parameters, then adaptation to changing noise conditions improves, but device complexity increases
Solution Approach 1:
The system performs preliminary encoding of the entire information object into multiple packets before transmission. This preliminary action allows the receiver to independently decode packets without requiring feedback loops, reducing device complexity while maintaining adaptability through iterative decoding strategies.
Solution Approach 2:
The decoding process is self-service with adaptive stopping criteria. The receiver autonomously determines when decoding is successful or when to request retransmission, eliminating the need for complex feedback mechanisms while maintaining adaptability to channel conditions.
3Reliability
If cyclic repetition of encoded object is used for error correction, then noise immunity improves, but transmission speed decreases
Solution Approach 1:
Instead of cyclically repeating the entire encoded object, the system segments the data into multiple packets transmitted in parallel. This segmentation enables faster transmission while maintaining noise immunity through iterative decoding of individual packets, eliminating the need for time-consuming cyclic repetitions.
Solution Approach 2:
The system maintains continuous transmission of multiple data packets simultaneously rather than pausing for cyclic repetitions. This continuous action increases transmission speed while iterative decoding ensures noise immunity is maintained throughout the transmission process.
Data Source
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AI summary
An encoder includes: a precoder for encoding an input information object according to a preset encoding scheme and storing the encoded information object in a precoder buffer; a sample number/address generation unit for generating a sample number of each sample and an address, which corresponds to each bit of each sample and the address of the precoder buffer; a multiplexer for selecting a bit of the precoder buffer corresponding to the address generated by the sample number/address generation module; a sampling buffer for storing a bit of each sample output from the multiplexer; a control packet generation module for generating a control packet including information on the sample number generated by the sample number/address generation module; a packet assembling unit for assembling the sample stored in the sampling buffer with the control packet generated by the control data generation module; and a modulation module for modulating the packet output from the packet assembling unit into a sound signal according to a preset scheme.