Introduction Approach/ Design System Modeling and Testbed Radar ...

Fully-Integrated FMCW Radar Waveform Synthesis and Radar Signal Processing Daniel Weyer, Prof. Michael P. Flynn (University of Michigan), Ahmed Albalai, Dr. Mohammed A. Asseri (KACST)

Introduction

Microwave Sensor Technology for Autonomous Vehicles

Radar Testbed

• Final project goal: Single-chip CMOS radar transceiver ® Automotive radar ® Navigation ® Self-driving cars

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Splitter

compact light power-efficient cheap

Mixer

PA

PLL chip

Power Supply Board

Tx

PLL Power Amplifier

Waveform Synthesis

ADC

Target

Rx FFT

LNA

Coax Cable

ADC

DSP

LNA IF Amplifier

Microcontroller with display of FFT spectrum and range

Mixer

Complete radar based on Michigan Waveform generation CMOS IC

Approach/ Design

PA

• Fractional-N PLL-based waveform generation

PA

Splitter

® Accurate, fast, flexible frequency synthesis, CMOS ® Improved target detection and resolution fref

CT S∆ PFD

Loop Filter

S∆

fout

DAC Analog Filter

VCO

Power Amp PLL

Divider

Waveform generator

Prescaler

Frequency Multiplier

Mixer

LNA

Transmit and Receive Paths Analog Blocks

S∆ Modulator

Die Photo

Measurements/Validation

Digital Blocks

• Generation of FMCW waveform with 200 MHz bandwidth and 2.68 ms cycle period • Display of IF frequency, range and FFT spectrum

PLL Block Schematic

• Implementation of complete end-to-end radar testbed ® Optimization of PLL design for single-chip radar ® Demonstration of complete radar system

• IC design of receiver components and integration with waveform synthesizer on single chip

System Modeling and Testbed FMCW Waveform Spectrum

Block Schematic of Radar Testbed T

Freq

• Fast, accurate and programmable PLL to feed transmitter chain • Testbed generates 10 GHz chirp waveform • Complete radar implementation, including waveform generation, TX, RX and digital baseband processing

Tx

IF Signal on Oscilloscope Display fb

BW

Þ Successful radar implementation with excellent performance

Rx

Detected range: 𝐑 =

Fall 2016

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Range resolution: ∆𝐑 =

Outlook and Future Plans

Time

FMCW Waveform

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IF Frequency, Distance and FFT Spectrum on Microcontroller Display

ü Completion of new PLL design and tapeout

Winter/Spring 2017 ü Testing of new PLL and publication

Spring/Summer 2017 ü Completion of transmitter chain and tapeout

And beyond… ü Implementation of receiver components and single-chip transceiver