UWB Pulse-Hopping Scheme for Reduced Interpath Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing IEEE 802.15.4z UWB wireless communication systems face significant interpath interference due to predictable path delays, particularly at higher data rates like 62 Mbps and 125 Mbps, leading to destructive signal interference and transmission drops.
Innovation Solution
Implementing a systematic and non-random pulse-hopping scheme with variable distances between pulses to minimize collision rates, using an optimized grid that stabilizes transmission regardless of user position, thereby avoiding transmission drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed pulse transmission scheme is used, then the system is simple to implement, but interpath interference causes transmission drops and unstable communication
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed pulse transmission scheme to a dynamic pulse-hopping scheme. The pulse positions are varied according to a systematic pattern rather than remaining fixed, allowing the system to adapt to different propagation paths and reduce interference while maintaining implementation feasibility through algorithmic control.
Solution Approach 2:
The patent changes the temporal parameters of pulse transmission by introducing variable time offsets and hopping patterns. Instead of transmitting pulses at fixed intervals, the system modifies the timing parameters systematically to avoid multipath interference, thereby improving transmission reliability without requiring complex hardware modifications.
2Reliability
If random pulse-hopping is used, then interpath interference is reduced, but transmission stability varies with user position
Solution Approach 1:
The patent implements periodic action through a systematic pulse-hopping pattern that repeats in a controlled manner. This periodic structure ensures that pulses are distributed in a predictable yet varied sequence, providing consistent interference reduction performance across different user positions while maintaining transmission stability through the regularity of the hopping pattern.
3Productivity
If higher data rates (62 Mbps, 125 Mbps) are implemented, then productivity increases, but interpath interference and collision rates increase
Solution Approach 1:
The patent applies segmentation by dividing the high-rate data stream into separately hopped pulse segments. Each segment undergoes systematic pulse-hopping independently, which reduces the collision probability for individual pulses while maintaining the overall high data rate through efficient packing and timing of the segmented pulses.
Data Source
AI summary
Systems and methods for reduced interpath interference for ultrawideband (UWB) wireless communication are disclosed. In one aspect, a wireless communication device employs a systematic and non-random pulse-hopping scheme to introduce variable distances between pulses to reduce collision rates from interpath interference. In exemplary aspects, the scheme optimizes avoidance of collision rates for distances between paths of up to thirty nanoseconds (30 ns). The use of an optimized grid will be stable regardless of position of the user, thereby avoiding transmission drops and improving the user experience.