Reception Apparatus Interference Measurement Modulo Operation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face challenges in measuring interference between multiple layers, particularly with the introduction of massive MIMO, which affects the quality of service for various radio communication services requiring ultra-high speed, large capacity, and ultra-low latency.
Innovation Solution
A receiving apparatus that includes a section for receiving data signals and demodulation reference signals, along with a control section that estimates interference using a specific signal and performs modulo operations on the data signals to accurately measure and manage interference between layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If massive MIMO is introduced to increase capacity and speed, then system capacity and data rate are improved, but interference between multiple layers increases
Solution Approach 1:
The transmitting apparatus performs preliminary interference cancellation by subtracting the interference component from the transmitted signal before transmission. This preliminary action removes the harmful interference between layers at the source, allowing the receiving apparatus to measure and process signals with reduced interference, thus resolving the contradiction between increased capacity and increased interference
Solution Approach 2:
A specific signal is introduced as an intermediary element to facilitate interference measurement. This specific signal is transmitted along with the data signal and enables the receiving apparatus to measure the interference between layers accurately. The intermediary signal acts as a reference that mediates between the multiple layers, allowing for precise interference characterization and cancellation
2Measurement precision
If interference measurement is performed to improve reception quality, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The transmitting apparatus generates a copy of the interference component that affects the data signal. This interference copy is then subtracted from the transmitted signal. By creating and using this interference copy, the system achieves accurate interference measurement and cancellation without requiring complex processing at the receiver, thus improving measurement precision while controlling device complexity
3Object-affected harmful factors
If modulo operation is performed on data signal to cancel interference, then interference cancellation is improved, but processing complexity increases
Solution Approach 1:
The invention applies modulo operation to transform the data signal into a form where interference can be effectively canceled. By changing the parameter representation of the signal through modulo operation, the system achieves improved interference cancellation. The specific signal is also subjected to modulo operation, enabling consistent interference measurement and cancellation while managing processing complexity through standardized operations
Data Source
AI summary
A receiving apparatus includes a receiving section that receives a data signal, a demodulation reference signal, and a specific signal in at least one of a plurality of layers, and a control section that, based on the demodulation reference signal and the specific signal, estimates interference, controls transmission of a result of the estimation, and performs a modulo operation of the data signal.