UWB Radar I/Q Integration for Low-Power Echo Digitization
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Solution Overview
Problem
Ultra-wideband radars face challenges in digitizing echo signals due to the need for extremely high-speed analog-to-digital converters, which consume power and increase hardware costs while also making it difficult to process the extremely short pulse signals effectively.
Innovation Solution
The ultra-wideband radar transceiver employs an I/Q signal generator, first and second sensing circuits with integrator, low-pass filter, and analog-to-digital conversion circuits to integrate and digitize M consecutive in-phase and quadrature-phase signals, reducing the difficulty of digitization by performing integration, low-pass filtering, and signal accumulation before analog-to-digital conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an extremely high-speed analog-to-digital converter is used to digitize echo signals, then the digitization capability is improved, but power consumption and hardware costs increase
Solution Approach 1:
The patent applies preliminary action by performing integration and low-pass filtering on the echo signal before analog-to-digital conversion. The integrator accumulates the echo signal over a predetermined time period, and the low-pass filter removes high-frequency noise, thereby preprocessing the signal to reduce the requirements for the subsequent ADC, thus lowering power consumption and hardware costs while maintaining digitization capability.
2Measurement precision
If an extremely high-speed analog-to-digital converter is used to digitize echo signals, then the digitization capability is improved, but hardware costs increase
Solution Approach 1:
The patent applies preliminary action by performing integration and low-pass filtering on the echo signal before analog-to-digital conversion. The integrator accumulates the echo signal over a predetermined time period, and the low-pass filter removes high-frequency noise, thereby preprocessing the signal to reduce the requirements for the subsequent ADC, thus lowering power consumption and hardware costs while maintaining digitization capability.
3Measurement precision
If the pulse width of the transmitted pulse signal is extremely small, then the detection resolution is improved, but the difficulty of digitization increases
Solution Approach 1:
The patent applies preliminary action by performing integration on the echo signal before analog-to-digital conversion. The integrator accumulates the signal over a predetermined time period, which amplifies the weak echo signal from short-duration pulses and converts it into a more manageable form for digitization, thereby reducing the difficulty of digitization while preserving detection resolution.
Solution Approach 2:
The patent introduces an integrator as an intermediary component between the echo signal reception and analog-to-digital conversion. This integrator serves as a mediator that transforms the extremely short pulse signals into integrated signals with extended duration and increased amplitude, making them more suitable for subsequent digital processing while maintaining the original detection resolution.
Data Source
AI summary
An ultra-wideband radar transceiver and an operating method thereof are provided. The ultra-wideband radar transceiver includes a receiving module. The receiving module includes an I/Q signal generator, a first sensing circuit and a second sensing circuit. The I/Q signal generator receives M consecutive echo signals and generates M consecutive in-phase signals and M consecutive quadrature-phase signals accordingly, wherein M is an integer greater than 1. The first sensing circuit is coupled to the I/Q signal generator to receive the M consecutive in-phase signals and is configured to perform integration and analog-to-digital conversion on the M consecutive in-phase signals to generate a first digital data. The second sensing circuit is coupled to the I/Q signal generator to receive the M consecutive quadrature-phase signals and is configured to perform integration and analog-to-digital conversion on the M consecutive quadrature-phase signals to generate a second digital data.