HE-SIGB RU Parameter Extraction for DL-OFDMA
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Solution Overview
Problem
In DL-OFDMA and DL-MUMIMO communications, existing systems face inefficiencies in processing HE-SIGB symbols, requiring significant hardware resources and time to store and multiplex RU parameters, especially when dealing with multiple RUs and large channel bandwidths.
Innovation Solution
A system that parses HE-SIGB symbols by using a receiver with control circuitry to determine RU sizes and tones allocated, incrementing a counter for non-dedicated RUs and storing parameters for dedicated RUs, allowing for efficient extraction of intended RU parameters without storing all RU parameters and reducing computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver stores all RU parameters and uses multiplexing operations to identify intended parameters, then the receiver can obtain RU parameters for all RUs, but the hardware area and processing time increase significantly
Solution Approach 1:
The patent extracts only the necessary RU parameters needed for the specific receiver instead of storing all RU parameters. The system identifies and extracts only the parameters relevant to the intended receiver, eliminating the need for large storage buffers and complex multiplexing operations while maintaining accurate parameter identification
Solution Approach 2:
The patent segments the RU parameter processing into distinct stages: receiving the HE-SIGB symbol, determining RU sizes from mapping tables, decoding user blocks, identifying the intended receiver, and extracting only the necessary parameters. This segmentation allows the system to process parameters efficiently without storing all parameters simultaneously
2Reliability
If the receiver stores all RU parameters and performs multiplexing operations, then complete RU parameter information is available, but the processing time increases
Solution Approach 1:
The patent performs preliminary actions by determining RU sizes from mapping tables and decoding user blocks before identifying the intended receiver. This allows the system to prepare parameter extraction in advance, reducing the time needed for actual parameter identification and extraction when processing is required
Solution Approach 2:
The system extracts only the specific RU parameters needed by the intended receiver from the decoded user blocks, rather than storing and processing all parameters. This extraction approach significantly reduces processing time while maintaining parameter completeness for the intended receiver
3Ease of operation
If large multiplexers are used to identify intended RU parameters, then parameter identification is possible, but hardware area increases
Solution Approach 1:
The patent eliminates the need for large multiplexers by extracting only the necessary RU parameters directly from the decoded user blocks. The system identifies the intended receiver and extracts parameters through direct access rather than multiplexing operations, significantly reducing hardware area while maintaining full parameter identification capability
Solution Approach 2:
The system creates a simplified copy of the parameter extraction process that directly accesses needed parameters from decoded blocks without requiring complex multiplexer hardware. This virtual copying approach replaces physical multiplexer structures with software-based parameter selection
Data Source
AI summary
Embodiments described herein provide systems for processing high efficiency SIGB (HE-SIGB) symbols and extracting resource unit (RU) information in down link orthogonal frequency division multiple access (DL-OFDMA) and multi-user multiple input multiple output (DL-MUMIMO) communication. An HE-SIGB symbol is processed based on an RU size mapping table. An RU counter is used to process entries in the RU size mapping table and determine the RU size and starting tone index of the intended RU. The RU parameters extracted from the HE-SIGB symbol are used to decode data symbols in the DL-OFDMA or DL-MUMIMO packet. Pilot tone indices of the intended User block and adjacent pilot tone indices are determined for improved carrier phase error estimation.