EDMG PPDU LDPC Stream Distribution for Multi-User MIMO
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Solution Overview
Problem
Current wireless communication systems in the millimeter-wave band face challenges in efficiently transmitting high-speed data due to limitations in data transmission rates and channel bandwidth, particularly in supporting multiple user MIMO communications and channel bonding techniques.
Innovation Solution
The implementation of an Enhanced Directional Multi-Gigabit (EDMG) Physical Layer Protocol Data Unit (PPDU) format and transmitter architectures that utilize vertical MIMO encoding and channel bonding to enhance data transmission rates, enabling up to 30 Gbps data rates and supporting multiple user MIMO communications by combining multiple 2.16 GHz channels into wider channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication systems are used in the millimeter-wave band, then device complexity is reduced, but data transmission rate is limited and channel bandwidth is insufficient
Solution Approach 1:
The patent segments the data stream into multiple spatial streams for parallel transmission through multiple antennas. Each spatial stream is independently encoded and modulated, allowing the system to achieve higher aggregate data rates by dividing the transmission task across multiple parallel channels rather than using a single complex transmission path.
Solution Approach 2:
The patent introduces spatial dimensionality by utilizing multiple antennas and spatial streams. Instead of increasing data rate along a single transmission dimension, the system adds spatial layers through MIMO technology, where data is transmitted simultaneously across multiple spatial dimensions, effectively multiplying the capacity without proportionally increasing spectral resources.
2Area of stationary object
If channel bonding techniques are implemented to combine multiple 2.16 GHz channels, then channel bandwidth increases, but device complexity increases
Solution Approach 1:
The patent merges multiple 2.16 GHz channels into a bonded channel to create a wider effective channel bandwidth. By combining adjacent frequency channels, the system achieves greater total bandwidth for data transmission, enabling higher data rates while maintaining compatibility with existing single-channel transmission components.
3Productivity
If vertical MIMO encoding is used to support multiple user communications, then data transmission rate increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the encoded data stream into multiple spatial streams that are independently transmitted through different antenna elements. This segmentation allows parallel processing of multiple users' data simultaneously, achieving higher aggregate throughput while distributing the encoding complexity across multiple simpler parallel operations rather than requiring a single complex sequential encoder.
Data Source
AI summary
For example, an EDMG STA may generate an LDPC coded bit stream for a user based on data bits for the user in an EDMG PPDU, the LDPC coded bit stream for the user including a concatenation of a plurality of LDPC codewords, a count of the plurality of LDPC codewords is based at least on a codeword length for the user and on a code rate for the user; generate encoded and padded bits for the user by concatenating the LDPC coded bit stream with a plurality of coded pad zero bits, a count of the coded pad zero bits is based at least on a count of one or more spatial streams for the user and on the count of the plurality of LDPC codewords for the user; and distribute the encoded and padded bits for the user to the one or more spatial streams for the user.