Adaptive Code Rate Control for Punctured Broadcast Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Broadcasting communication systems face degradation due to noise, fading, and Inter-Symbol Interference (ISI), requiring techniques to enhance communication reliability and maintain performance irrespective of information word length, which existing error-correcting codes struggle to achieve effectively.
Innovation Solution
A method and apparatus for adaptively selecting the number of shortened and punctured bits in a broadcasting communication system by determining temporary puncture bits based on modulation order, using parameters related to the ratio of bits to be punctured to bits to be shortened, and adjusting code rate to maintain stable system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of shortened bits increases, then the code rate decreases and BER/FER performance improves, but the data transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic adaptation of shortening and puncturing rates based on information word length. The system dynamically adjusts the number of shortened bits and punctured bits according to the actual transmission needs and channel conditions, allowing the code rate to be optimized in real-time rather than using fixed rates, thus resolving the contradiction between reliability and transmission efficiency
Solution Approach 2:
The patent changes the parameters of shortening rate and puncturing rate adaptively. By adjusting these parameters based on information word length and channel conditions, the system can achieve better BER/FER performance when needed while maintaining higher transmission efficiency when possible, thus resolving the contradiction between reliability and productivity
2Productivity
If the number of punctured bits increases, then the code rate increases and data transmission efficiency improves, but BER/FER performance deteriorates
Solution Approach 1:
The system dynamically adjusts the puncturing rate based on information word length and channel conditions. When transmission efficiency is prioritized, higher puncturing rates are applied; when reliability is prioritized, lower puncturing rates are used, thus dynamically resolving the contradiction between productivity and reliability
Solution Approach 2:
The patent changes the puncturing parameter adaptively according to transmission conditions. By adjusting the number of punctured bits based on information word length and channel quality, the system achieves optimal balance between data transmission efficiency and error performance
3Device complexity
If fixed code rate is used, then system implementation is simple, but performance varies significantly with information word length
Solution Approach 1:
The patent implements dynamic code rate adjustment based on information word length. The system automatically adapts the code rate to match the transmission conditions and data characteristics, ensuring stable performance across varying information word lengths while maintaining reasonable implementation complexity through standardized adaptation rules
Data Source
AI summary
An apparatus and a method for transmitting and receiving a signal in a communication system are provided. The method includes checking a type of the signal to be transmitted; determining a number of puncture bits according to the type of the signal; and puncturing an encoded signal to be transmitted according to the number of puncture bits.