EDMG PPDU Framing for Bonded mmWave MIMO Transmission
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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, which includes a combination of legacy and EDMG fields, enables transmission over multiple 2.16 GHz channels, supporting channel bonding and orthogonal frequency-division multiplexing (OFDM) for increased data rates and MIMO capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel bonding and MIMO techniques are implemented to increase data transmission rates, then productivity is improved, but device complexity increases
Solution Approach 1:
The PPDU is divided into distinct legacy and EDMG portions, allowing separate processing and transmission of different data streams. This segmentation enables MIMO and channel bonding operations to be performed on specific portions without affecting the entire transmission, thereby increasing data transmission rate while managing complexity through modular processing
Solution Approach 2:
The patent introduces a new dimensional structure by adding the EDMG portion as an extension to the legacy PPDU format. This allows additional spatial and frequency dimensions to be utilized through MIMO and channel bonding techniques, increasing productivity by transmitting multiple data streams simultaneously without fundamentally redesigning the entire system architecture
2Productivity
If multiple 2.16 GHz channels are bonded to increase bandwidth, then productivity is improved, but loss of energy increases due to wider frequency spectrum usage
Solution Approach 1:
Multiple 2.16 GHz channels are merged into a bonded channel structure within the EDMG portion of the PPDU. This combining allows the system to utilize wider bandwidth for increased productivity while managing energy loss through coordinated transmission across the bonded channels, where the energy consumption is optimized by processing all channels as an integrated unit rather than separate independent transmissions
Data Source
AI summary
An apparatus of a transmitter may include, for example, a Golay builder to build modulated Golay sequences for at least a non-EDMG Short Training Field (L-STF), and a non-EDMG Channel Estimation Field (L-CEF) of a PPDU; a scrambler to generate scrambled bits by scrambling bits of a non-EDMG header (L-header) and a data field of the PPDU; an encoder to encode the scrambled bits into encoded bits according to a low-density parity-check (LDDC) code; a constellation mapper to map the encoded bits into a stream of constellation points according to a constellation scheme; a spreader to spread the stream of constellation points according to a Golay sequence; and a transmit chain mapper to map a bit stream output from the Golay builder and the spreader to a plurality of transmit chains by applying a spatial expansion with relative cyclic shift over the plurality of transmit chains.