Radar Receiver Signal Conditioning for Low-Resolution ADC Demodulation
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Solution Overview
Problem
Current radar receivers face challenges in efficiently demodulating signals from targets at various distances using high resolution ADCs, which increases manufacturing costs and power consumption, and require complex circuitry for high linearity and output power range.
Innovation Solution
A radar receiver design that includes a processor for attenuating low frequency bands, a low pass filter for smoothing signals, and a low resolution ADC, with cascaded amplifiers and high pass filters to adjust gain and corner frequencies, allowing signal demodulation across diverse distances with reduced power consumption and integration into a single chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution ADC is used for signal demodulation, then measurement precision is improved, but manufacturing cost and power consumption increase
Solution Approach 1:
The patent applies preliminary action by performing analog signal processing (attenuation of low frequency bands, amplification, and low-pass filtering) before the ADC conversion. The processor attenuates low frequency components that contain less useful information, and the amplifier boosts the remaining signal. This preprocessing prepares the signal for efficient conversion by a lower-resolution ADC, achieving good demodulation precision without requiring high-bit ADCs, thus reducing power consumption.
2Measurement precision
If high resolution ADC is used for signal demodulation, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by performing analog signal processing (attenuation of low frequency bands, amplification, and low-pass filtering) before the ADC conversion. The processor attenuates low frequency components that contain less useful information, and the amplifier boosts the remaining signal. This preprocessing prepares the signal for efficient conversion by a lower-resolution ADC, achieving good demodulation precision without requiring high-bit ADCs, thus reducing manufacturing cost.
3Reliability
If complex circuitry is used for high linearity and output power range, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by performing analog signal processing (attenuation of low frequency bands, amplification, and low-pass filtering) before the ADC conversion. The processor attenuates low frequency components that contain less useful information, and the amplifier boosts the remaining signal. This preprocessing prepares the signal for efficient conversion by a lower-resolution ADC, achieving good demodulation precision without requiring high-bit ADCs, thus reducing manufacturing cost.
Data Source
AI summary
A high-efficiency high-integrated receiver is provided. The radar receiver according to an embodiment of the present disclosure includes a receiver configured to receive a radar signal, a processor configured to attenuate a magnitude of a low frequency band of the received signal of the receiver, a filter configured to perform a low pass filtering on an output signal of the processor, and an ADC configured to A/D convert the output signal of the filter. Accordingly, it is possible to demodulate all the signals being reflected from targets in various distances when even using a low resolution ADC, thereby reducing the manufacturing cost and power consumption.