MIMO Broadcast Pre-coding for Spectrum Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication methods in MIMO systems are inefficient, leading to suboptimal use of radio spectrum and reduced system capacity and performance.
Innovation Solution
The method involves modulating broadcast signals into multiple streams, pre-coding these streams to distribute them across multiple antennas, and transmitting them in a MIMO system, allowing for efficient interference cancellation and improved channel capacity through superposition coding and pre-coding techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current wireless communication methods are used in MIMO systems, then system implementation is straightforward, but system capacity and performance are reduced and radio spectrum is used inefficiently
Solution Approach 1:
The patent applies pre-coding to broadcast signals before transmission through the MIMO system. By performing coding and modulation operations in advance on the broadcast signal, the system optimizes spectrum utilization and enhances capacity without requiring complex real-time processing at transmission, thus resolving the contradiction between improving productivity and managing device complexity.
2Loss of energy
If pre-coding and superposition coding techniques are implemented, then radio spectrum usage efficiency improves, but system complexity increases
Solution Approach 1:
The patent performs pre-coding and superposition coding operations before signal transmission. By preparing the broadcast signal in advance with appropriate coding schemes, the system achieves efficient spectrum utilization while avoiding the need for complex real-time signal processing during transmission, thus improving spectrum efficiency without proportionally increasing system complexity.
Solution Approach 2:
The patent separates the broadcast signal into multiple streams and applies different pre-coding operations to each stream. This segmentation allows for optimized spectrum usage across multiple channels while managing complexity by processing each stream independently through standardized pre-coding blocks, rather than requiring complex joint processing of the entire signal.
3Reliability
If broadcast signals are transmitted without pre-coding, then transmission process is simple, but channel capacity and reliability are suboptimal
Solution Approach 1:
The patent applies pre-coding to broadcast signals before transmission, performing coding and modulation operations in advance. This preliminary processing enhances signal reliability and channel capacity by optimizing the signal structure before it enters the MIMO transmission system, while avoiding the need for complex real-time processing during transmission.
Solution Approach 2:
The patent introduces pre-coding blocks as intermediary components between the signal source and the MIMO transmission system. These pre-coding blocks perform necessary signal processing operations to improve reliability and capacity, acting as a mediator that enhances communication quality without requiring the transmission system itself to be overly complex.
Data Source
AI summary
The present disclosure relates generally to a system and method for broadcast pre-coding in a multiple input multiple output (MIMO) system. In one example, the method includes modulating a broadcast signal to create a stream of modulated symbols. Pre-coding is performed on each of the modulated symbols to break each modulated symbol into at least two pre-coded portions, and the two pre-coded portions of each modulated symbol are transmitted via at least two antennas.