Modified Reed Muller Coding for Pilot-Free Noncoherent Wireless Links
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Solution Overview
Problem
Current wireless communication technologies face challenges in achieving optimal decoding performance at low signal-to-noise ratios due to the reliance on pilot signals, which can result in high block error rates and information loss when using Reed Muller codes in noncoherent communication scenarios.
Innovation Solution
The implementation of modified Reed Muller codes by generating a Reed Muller generating matrix and removing the row vector consisting of all 1-values or prepending a fixed-value bit to the information bit vector, allowing for encoding and transmission of codewords without pilot signals, thereby reducing decoding block error rates and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pilot signals are transmitted for coherent communication, then decoding accuracy is improved, but spectral efficiency deteriorates and system complexity increases
Solution Approach 1:
The patent extracts and removes the all-1 row vector from the Reed Muller generating matrix, creating a modified code structure that eliminates the need for pilot signals. This extraction of the problematic component enables noncoherent communication while maintaining decoding performance.
Solution Approach 2:
Instead of using coherent communication with pilot signals, the patent inverts the approach by designing a code specifically for noncoherent communication. The modified Reed Muller code is constructed to be inherently suitable for noncoherent detection, reversing the conventional wisdom that pilot signals are necessary for accurate decoding.
2Measurement precision
If pilot signals are transmitted for coherent communication, then decoding accuracy is improved, but device complexity deteriorates
Solution Approach 1:
The patent extracts and removes the all-1 row vector from the Reed Muller generating matrix, creating a modified code structure that eliminates the need for pilot signals. This extraction of the problematic component enables noncoherent communication while maintaining decoding performance.
Solution Approach 2:
The modified Reed Muller code is designed to be self-sufficient for noncoherent communication. The code structure itself provides the necessary properties for accurate decoding without requiring external pilot signals, making the system self-service and reducing overall complexity.
3Ease of manufacture
If conventional Reed Muller codes are used in noncoherent communication, then implementation simplicity is improved, but decoding performance deteriorates due to high block error rates
Solution Approach 1:
The patent changes a critical parameter of the Reed Muller code by removing the all-1 row vector from the generating matrix. This parameter change transforms the code's properties, making it suitable for noncoherent communication while maintaining implementation simplicity and improving reliability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may generate a Reed Muller generating matrix for an information bit vector that includes a plurality of information bits. The wireless communication device may remove, from the Reed Muller generating matrix, a row vector consisting of all 1-values to form a modified Reed Muller generating matrix. The wireless communication device may encode the information bit vector using the modified Reed Muller generating matrix to form a codeword. The wireless communication device may transmit the codeword without transmitting a pilot signal or demodulation reference signal for the codeword. Numerous other aspects are provided.