DFT Size Decomposition for Multi-Antenna Tone Group Processing
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in optimizing antenna resource allocation and discrete Fourier transform (DFT) processing for efficient transmission, particularly in scenarios with non-coherent antenna ports, leading to interference and reduced throughput.
Innovation Solution
The solution involves determining decomposition groups for tones based on specific size constraints and balancing criteria, allowing for separate processing and transmission using multiple antenna ports, ensuring balanced antenna power utilization and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna interleaved allocation with FSS and D-FFT spreading operations is used for MIMO-OFDM systems, then transmission diversity performance is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent segments the DFT block of size N into multiple decomposition groups of sizes N1, N2, ..., NK where each group satisfies the constraint N = A^α3^β5^γ. This segmentation allows separate processing of each group using different antenna ports, achieving transmission diversity while reducing the processing complexity of each individual group compared to processing the entire block at once.
Solution Approach 2:
The patent introduces a new dimension of decomposition by factoring the DFT size N into prime factors 2, 3, and 5 with respective exponents α, β, and γ. This dimensional decomposition enables the system to process tones in multiple independent groups simultaneously across different antenna ports, transforming a single complex processing task into multiple simpler parallel tasks.
2Adaptability or versatility
If discrete Fourier transform block size is constrained to N = A^α3^β5^γ, then decomposition into multiple groups is enabled, but flexibility in DFT block size selection is reduced
Solution Approach 1:
The patent changes the parameter of DFT block size to conform to the specific form N = A^α3^β5^γ where A is an integer and α, β, γ are non-negative integers. This parameter constraint enables the block size to be decomposed into groups with sizes that are multiples of 2, 3, and 5, facilitating systematic decomposition into multiple manageable groups while maintaining mathematical consistency.
Solution Approach 2:
The patent creates a universal decomposition framework that works for any DFT block size satisfying the constraint N = A^α3^β5^γ. This universal approach allows the same decomposition methodology to be applied across different system configurations and antenna port arrangements, making the solution broadly applicable to various MIMO-OFDM scenarios.
3Productivity
If tones are divided into decomposition groups for separate transmit processing, then interference is reduced and throughput is enhanced, but the determination of optimal group sizes becomes more complex
Solution Approach 1:
The patent performs preliminary decomposition of the DFT block into groups with sizes satisfying specific constraints (multiples of 2, 3, and 5) before the actual transmit processing. This preliminary action establishes a structured foundation that simplifies subsequent processing steps and enables systematic allocation of tones to antenna ports based on pre-determined group characteristics.
Solution Approach 2:
The decomposition process inherently self-organizes the tones into groups that automatically satisfy the size constraints. The mathematical structure of N = A^α3^β5^γ ensures that the decomposition yields groups with sizes that are natural multiples of 2, 3, and 5, eliminating the need for complex external optimization algorithms to determine group sizes.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, based at least in part on a decomposition rule for a discrete Fourier transform (DFT) block, a plurality of decomposition groups for tones, corresponding to a plurality of antenna ports of the UE, of a transmission. The UE may map the tones to the plurality of decomposition groups for transmission processing, and transmit, using the plurality of antenna ports, the transmission based at least in part on transmission processing. Numerous other aspects are provided.