EDMG PPDU LDPC Encoding for Multi-User Spatial Stream Alignment
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Solution Overview
Problem
Current wireless communication systems in the millimeter-wave band face challenges in efficiently transmitting high-speed data over directional multi-gigabit channels, particularly in supporting multiple user MIMO communications and ensuring data alignment across users, which limits data transmission rates and network capacity.
Innovation Solution
The implementation of an Enhanced Directional Multi-Gigabit (EDMG) Physical Layer Protocol Data Unit (PPDU) format that includes advanced encoding schemes, such as LDPC encoding, and channel bonding techniques to enable efficient transmission over multiple spatial streams, ensuring data alignment and increased transmission rates up to 30 Gbps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current wireless communication systems transmit data in millimeter-wave band, then high-speed data access is provided, but data transmission rates and network capacity are limited due to inability to efficiently support multiple user MIMO communications and data alignment
Solution Approach 1:
The PPDU is segmented into multiple spatial streams, each independently encoded and modulated. This segmentation enables parallel transmission to multiple users simultaneously, increasing overall data transmission rate while managing system complexity through modular processing of each stream
Solution Approach 2:
The system transitions from single-stream transmission to multi-dimensional spatial multiplexing by utilizing multiple spatial streams and antenna elements. This dimensional expansion in the spatial domain enables simultaneous transmission to multiple users, dramatically increasing network capacity and data rates
2Productivity
If advanced encoding schemes like LDPC encoding and channel bonding techniques are implemented, then transmission rates increase up to 30 Gbps, but device complexity increases
Solution Approach 1:
LDPC encoding is performed preliminarily on data before modulation and spatial stream mapping. This preliminary encoding step prepares data for efficient transmission by establishing error correction capabilities in advance, enabling high transmission rates with manageable complexity through systematic preprocessing
Solution Approach 2:
Multiple channels are bonded together to form a unified transmission medium with increased bandwidth. By merging multiple frequency channels, the system achieves higher transmission rates (up to 30 Gbps) while consolidating complexity into a single integrated channel management approach
Data Source
AI summary
Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating a Physical Layer Protocol Data Unit (PPDU). For example, an Enhanced Directional Multi-Gigabit (DMG) (EDMG) station (STA) may be configured to encode a Physical Layer (PHY) Service Data Unit (PSDU) of at least one user in an EDMG PM Protocol Data Unit (PPDU) according to an EDMG Low-Density Parity-Check (LDPC) encoding scheme, which is based at least on a count of one or more spatial streams for transmission to the user; and transmit the EDMG PPDU in a transmission over a channel bandwidth in a frequency band above 45 Gigahertz (GHz).