EDMG Header B Encoding for Multi-Gigabit Directional Wireless Links
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Solution Overview
Problem
Current wireless communication systems in the millimeter-wave band face challenges in efficiently encoding and transmitting data at high speeds, particularly in achieving multi-gigabit data rates over directional links, which limits network capacity and application performance.
Innovation Solution
The implementation of an Enhanced Directional Multi-Gigabit (EDMG) system that uses a specific encoding scheme for the EDMG Header B field, involving Linear Feedback Shift Registers (LFSRs) and Low-Density Parity-Check (LDPC) codewords, to scramble and transmit data blocks across multiple space-time streams, enabling efficient channel bonding and increased channel bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional encoding schemes are used in millimeter-wave wireless systems, then device complexity is reduced, but data transmission rate is limited and cannot achieve multi-gigabit speeds
Solution Approach 1:
The encoding process is divided into distinct stages: scrambling using LFSRs, channel coding using LDPC, and spatial mapping across multiple streams. This segmentation allows each component to be optimized independently while achieving multi-gigabit transmission rates through the combined effect of multiple encoding operations working in parallel
Solution Approach 2:
The system dynamically adjusts encoding parameters including LFSR polynomial selections, LDPC code rates, and the number of spatial streams based on channel conditions and desired data rates. This enables the system to achieve multi-gigabit speeds by selecting appropriate parameter combinations that balance complexity and performance
2Productivity
If channel bonding is implemented to increase channel bandwidth, then data transmission rate increases, but signal repetition issues arise
Solution Approach 1:
The system employs feedback mechanisms where the encoder is aware of the channel bonding configuration and signal repetition patterns. This feedback allows the encoder to adjust scrambling sequences and coding parameters to avoid harmful repetitions while maintaining the bandwidth aggregation benefits of channel bonding for multi-gigabit transmission
Solution Approach 2:
The scrambling operation using LFSRs is performed preliminarily on the data before channel coding and transmission. This preliminary scrambling randomizes the signal characteristics and prevents harmful signal repetition when channels are bonded, thereby maintaining signal quality while enabling increased channel bandwidth for higher data rates
3Productivity
If multiple space-time streams are used for MIMO communications, then network capacity increases, but device complexity and processing requirements increase
Solution Approach 1:
The MIMO transmission is segmented into multiple independent space-time streams, each undergoing separate encoding and modulation processes. This segmentation allows the system to scale network capacity by adding streams while keeping the processing complexity of each individual stream manageable through standardized encoding operations
Solution Approach 2:
The encoding apparatus is designed with universal components including LFSR-based scramblers and LDPC encoders that can process multiple streams simultaneously using the same algorithms. This multi-functionality allows the system to support varying numbers of spatial streams for MIMO communications without requiring fundamentally different processing architectures
Data Source
AI summary
For example, an Enhanced Directional Multi-Gigabit (DMG) (EDMG) wireless communication station (STA) may be configured to scramble, according to a first scrambling sequence, a plurality of EDMG Header B bits of an EDMG Header B field of an EDMG Multi-User (MU) Physical Layer (PHY) Protocol Data Unit (PPDU) into a plurality of scrambled header bits; generate a Low-Density Parity-Check (LDPC) codeword based on the plurality of scrambled header bits; determine a data block based on the LDPC codeword; generate one or more scrambled data blocks based on the data block by scrambling the data block according to a second scrambling sequence; and transmit a wireless transmission of the EDMG Header B based on the one or more scrambled data blocks.