Multi-Antenna Equalization With Likelihood Exchange for Diversity Gain
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing receiving antenna diversity systems with linear processing have limited performance improvement due to small processing amounts and corresponding small performance gains in turbo equalization.
Innovation Solution
A receiving apparatus that uses multiple antennas, incorporating a pilot separation section, channel estimation, and multiple equalization sections that exchange likelihood information to improve diversity effects, with interference replica generation and subtraction to minimize interference, and adaptive processing based on Quality of Service (QoS) to optimize signal detection and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If linear processing antenna synthesis is used, then processing amount is reduced, but receiving antenna diversity effect is insufficient
Solution Approach 1:
The receiving apparatus divides the signal processing into separate equalization sections for each antenna, with each section independently processing signals from its corresponding antenna. This segmentation allows non-linear turbo equalization to be applied to each antenna's signal separately, improving diversity effect while maintaining manageable processing complexity through modular architecture.
Solution Approach 2:
The patent implements feedback loops where likelihood information is exchanged between equalization sections and channel decoders. The equalization sections use likelihood information from other equalization sections and decoders to iteratively refine signal estimates, creating a feedback mechanism that enhances receiving antenna diversity effect through multiple iterations of processing.
2Reliability
If likelihood information is exchanged among multiple equalization sections, then receiving diversity effect is improved, but device complexity increases
Solution Approach 1:
The patent merges the functionality of multiple equalization sections into a unified turbo equalization framework where each section processes signals from different antennas. By combining the likelihood information exchange mechanism across all equalization sections and the channel decoder, the system achieves improved diversity effect while sharing common processing resources and algorithms.
Solution Approach 2:
Each equalization section is designed with universal functionality to process signals from any antenna and exchange likelihood information with any other equalization section. This multi-functional design allows the same processing architecture to be reused across multiple antennas, reducing overall system complexity compared to having dedicated processing paths for each antenna.
Data Source
AI summary
A receiving antenna diversity effect is improved by equalizing the likelihood while exchanging the likelihood among a plurality of equalizers. A receiving apparatus (300) which receives radio signals using a plurality of antennas (301-1 to 301-M), comprises: pilot separation sections (304-1 to 304-M) separating a pilot signal and a received data signal from the radio signals; a channel estimation section (305) calculating a channel estimation value corresponding to each of the antennas (301-1 to 301-M) according to the pilot signal; and a reception processing section (306) performing signal detection for the received data signal corresponding to each of the antennas (301-1 to 301-M) and having a plurality of equalization sections each generating likelihood information according to the received data signal and the channel estimation value, wherein any one of the equalization sections generates likelihood information using the likelihood information generated by another equalization section and also outputs the generated likelihood information to another equalization section.