Interleaving Codebook Elements to Reduce Signal Correlation
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Solution Overview
Problem
Non-orthogonal-resource based multiple access technologies, such as SCMA, face challenges in reducing interference between user equipment signals, leading to degraded Bit Error Rate (BER) performance due to high complexity in codebook design and interference correlation.
Innovation Solution
An electronic device with a processing circuitry that determines codebook information for non-orthogonal-resource based multiple access and interleaves codewords to reduce correlation among user equipment signals, using a constellation modulation module, resource allocation module, and interleaving unit to modulate and map bit information into complex symbols, and expand transmission resources to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-orthogonal-resource based multiple access is used to achieve higher spectrum efficiency, then spectrum efficiency is improved, but interference correlation between user equipment signals increases
Solution Approach 1:
The patent segments the codebook design into two independent steps: high-dimensional constellation design and mapping matrix design. This segmentation allows each step to be optimized separately, reducing the overall complexity while maintaining the ability to achieve higher spectrum efficiency through non-orthogonal resource allocation.
Solution Approach 2:
The patent changes the design parameters by optimizing both the high-dimensional constellation and mapping matrix to minimize Bit Error Rate. This parameter optimization approach allows the system to achieve better performance in terms of spectrum efficiency while managing interference correlation through carefully selected constellation points and mapping relationships.
2Reliability
If codebook design is optimized to reduce Bit Error Rate, then BER performance is improved, but design complexity increases
Solution Approach 1:
The patent divides the complex codebook design problem into two manageable segments: high-dimensional constellation design and mapping matrix design. This segmentation reduces the computational complexity of each individual design step while maintaining overall BER performance through coordinated optimization of both segments.
Solution Approach 2:
The patent transitions from traditional low-dimensional constellation design to high-dimensional constellation design. This dimensional expansion provides additional degrees of freedom for signal separation, improving BER performance while the structured approach to high-dimensional design keeps the complexity manageable through the two-step methodology.
3Reliability
If conventional bit-level interleaving is used to disperse centralized errors, then error dispersion is improved, but signal correlation between users remains high
Solution Approach 1:
The patent introduces a new dimension to the interleaving process by operating on high-dimensional constellation points rather than conventional bit-level sequences. This high-dimensional interleaving approach disperses errors more effectively across multiple dimensions while simultaneously reducing signal correlation between different users through the structured permutation of high-dimensional signal components.
Data Source
AI summary
The present disclosure is related to an electronic device and communication method for non-orthogonal-resource based multiple access. An electronic device on a transmitting side in a communication system comprises a processing circuitry configured to determine information on codebook for non-orthogonal-resource based multiple access over a set of transmission resources, and interleave a plurality of occupied elements of at least two codewords of the same user equipment on the set of transmission resources, so as to reduce a correlation among a plurality of user equipments during the non-orthogonal-resource based multiple access.