RF Device Channel Stitching for Extended Bandwidth
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Solution Overview
Problem
Existing RF devices, particularly in ultra-wideband (UWB) radar applications, are limited by their bandwidth, which restricts the accuracy and resolution of signal processing, especially when using standardized channels with limited bandwidth.
Innovation Solution
The RF device employs a method of channel stitching, where channel responses from multiple channels with different frequency bands are calibrated and combined using a calibration base, effectively increasing the bandwidth and improving accuracy and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standardized channels with limited bandwidth are used, then device complexity is reduced and ease of operation is improved, but measurement precision and bandwidth are limited
Solution Approach 1:
The patent combines multiple standardized channels (first channel with first frequency band and second channel with second frequency band) to form an extended bandwidth channel. The control device performs channel stitching by combining channel responses from multiple channels, thereby achieving extended bandwidth (potentially four times the original bandwidth) while using only standardized building blocks, thus resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent segments the extended bandwidth channel into multiple standardized sub-channels, each operating within its own frequency band. By dividing the overall bandwidth into manageable standardized channels that can be individually processed and then combined through channel stitching, the system achieves high measurement precision without requiring a single complex wideband hardware component
2Measurement precision
If standardized channels with limited bandwidth are used, then hardware requirements are simplified, but accuracy and resolution of signal processing deteriorate
Solution Approach 1:
The patent merges channel responses from multiple standardized channels through channel stitching to achieve extended bandwidth. This combining process improves accuracy and resolution of signal processing (by up to four times according to the patent) while maintaining hardware simplicity, as each individual channel still uses standardized hardware configurations
Solution Approach 2:
The patent extends the frequency dimension by combining multiple channels operating at different frequency bands. Instead of requiring a single complex wideband hardware system, the invention uses multiple narrowband standardized channels at different frequencies, combining them in the frequency domain to achieve the equivalent performance of a wideband system
Data Source
AI summary
An RF device includes a first channel with a first frequency band, configured to receive a first signal; and a second channel with a second frequency band, configured to receive a second signal. The first frequency band and the second frequency band are different. The device includes control circuitry configured to obtain a first channel response associated with the received first signal at the first channel, to obtain a second channel response associated with the received second signal at the second channel and to calibrate the first channel response and the second channel response by steering to a calibration base. The control circuitry is further configured to calibrate the first channel response and second channel response by channel stitching to obtain a combined channel response.