Dynamic Frame Structure for Millimeter-Wave Wireless Signaling
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Solution Overview
Problem
Current millimeter-wave wireless communication systems face challenges in efficiently supporting multiple header rates and PHY modes, particularly for low-power devices, due to the lack of adaptability in frame structures, which leads to increased power consumption and decoding difficulties in synchronizing with superframes.
Innovation Solution
The proposed solution involves an improved frame structure that supports multiple header rates and PHY modes by using Golay codes with varying lengths and SFD code blocks, along with a timestamp for efficient superframe timing detection, enabling devices to differentiate between single carrier and OFDM packets and adapt preamble lengths based on data rates, reducing spectral lines and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed frame structure is used in millimeter-wave wireless communication systems, then device complexity is reduced, but adaptability to different PHY modes and header rates deteriorates
Solution Approach 1:
The frame structure is made dynamic by introducing variable-length Golay codes (different code lengths) and multiple SFD code blocks that can be selectively used based on the PHY mode and data rate requirements. This allows the same basic frame structure to adapt to different communication scenarios without requiring multiple completely different frame designs.
Solution Approach 2:
The invention changes key parameters of the frame structure including the length of Golay codes, the number and position of SFD code blocks, and the use of timestamps. These parameter variations enable the system to support multiple PHY modes (single carrier and OFDM) and different header rates while maintaining a unified frame structure approach.
2Device complexity
If traditional frame structures are used without optimized timing detection, then device simplicity is maintained, but power consumption increases due to inefficient superframe synchronization
Solution Approach 1:
The SFD code blocks are placed at predetermined positions within the frame structure, allowing devices to quickly locate and synchronize to superframe boundaries without extensive searching. This preliminary positioning of synchronization markers reduces the time and energy required for superframe synchronization.
Solution Approach 2:
The timestamp field acts as an intermediary that carries explicit timing information, enabling receiving devices to accurately determine superframe boundaries and timing without complex correlation or search algorithms. This intermediary element simplifies the synchronization process and reduces power consumption.
3Adaptability or versatility
If Golay codes with varying lengths are used to support multiple header rates, then adaptability to different data rates is improved, but decoding complexity increases
Solution Approach 1:
The frame structure is segmented into distinct parts with clear delimiters (SFD code blocks) that separate the header from the data payload. This segmentation allows receiving devices to efficiently identify and process different code lengths without having to analyze the entire frame structure, reducing decoding complexity while maintaining support for multiple header rates.
Data Source
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AI summary
A wireless network uses an improved frame structure to increase timing acquisition capabilities as well as reduction of spectral lines. In one aspect, the frame packet can be used to communicate the different modes of operation under which the packet was created.