Transmitting Apparatus Using Different Parameter Sets for Data and Reference Signals
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Solution Overview
Problem
Communication systems compatible with GFDM that use a mixture of multiple communication parameter sets, such as subcarrier spacings and symbol lengths, often experience interference due to non-orthogonality of resources, and existing techniques insufficiently address this issue.
Innovation Solution
A transmitting and receiving apparatus that uses different communication parameter sets for data and reference signals, allowing for enhanced resistance against interference by applying distinct processing techniques for each signal type, including variable subcarrier spacing and subsymbol period settings, and specific filtering and oversampling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mixture of multiple communication parameter sets (subcarrier spacings, symbol lengths) is used in GFDM systems, then system flexibility and adaptability are improved, but resource orthogonality deteriorates causing interference
Solution Approach 1:
The patent divides the communication system into separate processing sections for data signals and reference signals. Each section can independently select communication parameter sets, allowing the data signal to use flexible parameters while the reference signal uses orthogonal parameters, thus resolving the contradiction between adaptability and orthogonality.
Solution Approach 2:
Different communication parameter sets are applied to different parts of the system: data signals can use non-orthogonal parameter sets for flexibility, while reference signals use orthogonal parameter sets for reliability. This local differentiation allows each component to optimize its parameters independently.
2Reliability
If different communication parameter sets are used for data and reference signals, then interference resistance is improved, but system complexity increases
Solution Approach 1:
The system is segmented into independent processing sections for data signals and reference signals. Each processing section handles its own parameter selection and signal generation independently, which simplifies the overall system architecture while achieving interference resistance through parameter differentiation.
3Adaptability or versatility
If multiple communication parameter sets are supported, then communication versatility is improved, but channel estimation accuracy deteriorates due to interference
Solution Approach 1:
The patent applies different quality requirements to different signal types: data signals prioritize versatility with flexible parameter sets, while reference signals prioritize measurement precision with orthogonal parameter sets. This allows accurate channel estimation through reference signals while maintaining communication versatility through data signal flexibility.
Data Source
AI summary
[Object] Provided is a mechanism for enhancing resistance against an interference that possibly occur due to non-orthogonality of a resource in a communication system holding communication with a mixture of a plurality of communication parameter sets. [Solving Means] A transmitting apparatus holding communication using a plurality of communication parameter sets in a unit resource, and including a processing section that transmits a data signal and a reference signal generated using the parameter sets different between the data signal and the reference signal to a receiving apparatus.