Wide-Band Compressive Receiver With Digital Phase Encoding
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Solution Overview
Problem
Traditional RF receivers face high power consumption and inefficiencies when processing wide bandwidth signals due to the need for high sample rates, leading to potential circuit damage and inability to process large data quantities in real time.
Innovation Solution
A direct sampled wide-band compressive receiver architecture that divides wide-band RF signals into multiple sub-bands for parallel processing, utilizing all-digital phase encoding and signal processing techniques to reduce power consumption and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional RF receivers process wide bandwidth signals at high sample rates, then signal detection capability is improved, but power consumption increases and circuit reliability deteriorates
Solution Approach 1:
The patent divides the wide bandwidth signal into multiple sub-bands using digital filtering. Each sub-band is processed separately with lower sample rates, reducing overall power consumption while maintaining detection capability. The signal reconstruction phase combines results from all sub-bands to achieve wideband detection performance.
2Measurement precision
If traditional RF receivers process wide bandwidth signals at high sample rates, then signal detection capability is improved, but circuit reliability deteriorates due to potential circuit damage
Solution Approach 1:
By segmenting the wide bandwidth into narrower sub-bands, the patent reduces the sample rate requirement for each processing channel. This lower sample rate reduces stress on circuit components, preventing damage and improving reliability while still detecting wideband signals through parallel sub-band processing.
3Productivity
If traditional RF receivers process wide bandwidth signals at high sample rates, then real-time processing capability is improved, but the ability to process large data quantities in real time deteriorates
Solution Approach 1:
The patent segments the large volume of wideband signal data into smaller sub-band data streams. Each sub-band requires less computational resources to process in real-time, making the overall system capable of handling large data quantities through parallel processing of multiple manageable streams rather than overwhelming a single high-sample-rate channel.
Solution Approach 2:
The patent transforms the problem from processing a single high-dimensional wideband signal into processing multiple lower-dimensional sub-band signals. This dimensional transformation reduces computational complexity per channel while maintaining overall processing capability through parallel execution across multiple channels.
4Measurement precision
If digital phase encoding is applied to sub-band signals, then decoding accuracy for low signal-to-noise ratio signals is improved, but device complexity increases
Solution Approach 1:
The patent introduces phase encoding as an intermediary processing step in the digital domain. By encoding phase information from multiple sub-band signals and then decoding them collectively, the system enhances the detectability of weak signals against noise. The phase encoding acts as a mediator that transforms the signal representation to improve signal-to-noise ratio before final detection.
Data Source
AI summary
Techniques for compressive receiving. An example RF receiver includes a plurality of digital phase shifters configured to apply a phase encoding scheme to a multi-band digital signal to produce a plurality of reference signals and a corresponding plurality of phase-encoded signals, each reference signal and each phase-encoded signal containing frequency information representing a respective sub-band of the multi-band digital signal, summers that respectively sum the plurality of reference signals and the plurality of phase-encoded signals, channelizers that divide the summed reference signal and the summed phase-encoded signal into a plurality of frequency bins, and a detector configured to detect a signal of interest and to perform delta phase measurements using the summed reference signal and the summed phase-encoded signal to estimate an original RF frequency of the detected signal of interest.