UWB Data Redundancy for Multipath Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication networks face inefficiencies due to interference and multipath degradation, leading to distorted signals and increased network traffic from retransmissions, particularly in ultra-wideband (UWB) communications, which affect data transmission reliability and range.
Innovation Solution
The implementation of a data system that includes a spreading code generator for generating spreading sequences, a signal generator for creating ultra-wideband modulated signals, and a transmitter for transmitting direct sequence spread signals, along with data redundancy techniques to combat multipath degradation and interference, such as frequency hopping and OFDM data spreading, to enhance data transmission reliability and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data retransmission is performed when signal distortion occurs, then data transmission reliability is improved, but network traffic increases producing additional interference
Solution Approach 1:
The patent applies preliminary action by performing interference estimation and multipath degradation mitigation before data transmission occurs. The system estimates interference levels and adjusts transmission parameters in advance, preventing signal distortion before it happens rather than relying on retransmission after distortion occurs. This approach improves data transmission reliability while avoiding the additional network interference that would result from retransmissions.
2Length of stationary object
If spreading sequences are applied to UWB signals, then communication range is extended and multipath degradation is mitigated, but signal processing complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting spreading sequence parameters based on estimated interference levels and channel conditions. The system modifies spreading factors, sequence lengths, and other parameters to optimize the balance between extending communication range/mitigating multipath degradation and controlling signal processing complexity. This allows the system to adapt to different transmission scenarios and maintain efficiency while achieving extended range and robustness.
Data Source
AI summary
A system is provided that can introduce data redundancy into wireless communications, and in particular ultra-wideband (UWB) wireless communications to increase the communication range when transmitting data that has low transmission rates. Multipath degradation, introduced by the extended communications range, can be mitigated by frequency hopping between the orthogonal frequency-division multiplexed symbols of the ultra-wideband waveform. Frequency hopping can place adjacent symbols in different frequency channels for filtering. Data redundancy can be expanded in the time domain and/or the frequency domain, resulting in extended range.