UWB Packet PRF Switching for Discontinuous Transmission
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Solution Overview
Problem
Existing UWB communication systems face challenges in efficiently transmitting packets at variable pulse repetition frequencies (PRF) and maintaining performance comparable to prior art techniques while allowing for discontinuous packet transmission.
Innovation Solution
A method and apparatus for configuring a wireless communication system to transmit packets with first and second portions at different selected pulse repetition frequencies (PRF) and transmit packets discontinuously, utilizing a convolutional encoder and compressed modulation schema to optimize packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are transmitted continuously at fixed PRF, then carrier synchronization is easier to maintain, but power consumption increases and adaptability to different transmission scenarios is reduced
Solution Approach 1:
The system dynamically adjusts the pulse repetition frequency (PRF) based on transmission requirements. Different packet portions (preamble, SFD, data payload) can be transmitted at different PRFs, allowing the system to optimize between synchronization reliability and power consumption adaptively
Solution Approach 2:
The patent implements discontinuous packet transmission where packets are sent in periodic bursts rather than continuously. This allows the transmitter to remain inactive between packets, significantly reducing power consumption while maintaining reliable communication through periodic updates
2Use of energy by moving object
If packets are transmitted discontinuously, then power consumption is reduced, but carrier synchronization becomes more difficult to maintain
Solution Approach 1:
The preamble portion of the packet is transmitted with a higher PRF before the main data payload. This preliminary high-PRF transmission establishes and reinforces carrier synchronization before switching to lower PRF or discontinuous transmission, ensuring the receiver is properly synchronized even when packets are sent intermittently
Solution Approach 2:
The packet is segmented into different portions (preamble, SFD, data payload) that can be transmitted with different PRFs. The preamble uses high PRF for synchronization, while subsequent portions can use lower or variable PRF for power savings, resolving the contradiction between continuous synchronization and discontinuous transmission
3Productivity
If variable PRF is used for different packet portions, then transmission efficiency and power management are improved, but system complexity increases
Solution Approach 1:
Different portions of the packet are transmitted with locally optimized PRFs tailored to their specific requirements. The preamble uses high PRF for reliable synchronization, while the data payload can use lower or variable PRF for efficiency, allowing each part to have the quality needed for its function without complicating the entire system
Solution Approach 2:
The system changes the PRF parameter dynamically based on the packet portion being transmitted. This parameter change allows optimization of transmission efficiency for different data types while managing complexity through standardized change points at packet boundaries rather than requiring continuous complex control
Data Source
AI summary
In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets discontinuously.