Parity Check Encoding With Diverse Pulse Shaping for ISC Signals
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Solution Overview
Problem
Conventional communication systems are overly power hungry and spectrally inefficient, failing to effectively manage power consumption and spectral usage in wireless and wired communications.
Innovation Solution
A system and method for forward error correction with parity check encoding are implemented to achieve low complexity and high spectral efficiency, utilizing diverse pulse shaping filters for information and parity samples, and incorporating a parity function that operates over adjacent and non-adjacent information symbols to optimize sequence estimation and symbol error rate performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional communication systems are used, then implementation is simple, but power consumption is high and spectral efficiency is low
Solution Approach 1:
The system segments the signal processing into distinct functional blocks: pulse shaping filter for information symbols, separate pulse shaping filter for parity samples, sequence estimator, and symbol estimator. This segmentation allows each component to be optimized independently for low power consumption while maintaining overall system functionality.
Solution Approach 2:
The patent changes key parameters including using diverse pulse shaping filters with different impulse responses for information and parity samples, optimizing the parity sample power ratio, and adjusting the sequence estimation algorithm parameters to achieve low power consumption while maintaining spectral efficiency.
2Productivity
If conventional communication systems are used, then implementation is simple, but spectral efficiency is low
Solution Approach 1:
The system performs preliminary pulse shaping on both information symbols and parity samples before transmission. By pre-shaping the parity samples through a diverse filter, the system prepares the signal in advance to maximize spectral efficiency while reducing the computational burden during reception and sequence estimation.
Solution Approach 2:
Parity samples act as an intermediary between the information symbols and the received signal. These diversity-coded parity samples carry redundant information that aids in sequence estimation and error correction, improving spectral efficiency by enabling more reliable communication without requiring retransmissions.
3Measurement precision
If diverse pulse shaping filters are used for information and parity samples, then sequence estimation performance is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by using different pulse shaping filter characteristics specifically for parity samples compared to information symbols. The parity sample filter is designed with specific impulse response properties that enhance sequence estimation accuracy locally at the parity sample positions, while the overall system complexity remains manageable through this targeted approach.
Data Source
AI summary
A transmitter inserts parity samples into a stream of information symbols in an inter-symbol correlated (ISC) signal. The inserted parity samples may be utilized to generate estimates of corresponding information symbols when they are received by a receiver. The information symbols may be pulse shaped by a first pulse shaping filter characterized by a first response. The parity samples may be pulsed shaped by a second pulse shaping filter characterized by a second response. The first response and the second response are diverse or uncorrelated. The transmitter may transmit the ISC signal comprising the pulse shaped information symbols and the pulse shaped parity samples. The parity samples may be generated utilizing a non-linear function over a plurality of the information symbols. The non-linear function may be diverse from a partial response signal convolution corresponding to the information symbols and is designed according to a desired SNR value at the receiver.