22-29GHz Ultra-Wideband CMOS Pulse Generator for ... - ASP-DAC
22-29GHz Ultra-Wideband CMOS Pulse Generator for Collision Avoidance Short Range Vehicular Radar Sensors Ahmet Oncu, B.B.M. Wasanthamala Badalawa, Tong Wang and Minoru FUJISHIMA School of Frontier Sciences The University of Tokyo 01/24/2007
ASP DAC 2007
1
Introduction Front Central control unit
Left side
Right side
Radar CCU
Back
Radar sensor
Short range radar sensor system covering 360o 01/24/2007
360o pre-crash detection Collision warning Blind spot detection Intersection alerts Automatic cruse control Park aid ….. A few cm resolution At least 5GHz Bandwidth Low power Low cost
ASP DAC 2007
2
Proposed CMOS SR radar sensor Conventional transmitter for SR pulse radar sensor
CW input
pulse train
TX pulse width control DSP
This work Pulse Receiver
TX object
RX
CMOS
CMOS
Many discrete components mmWave CW oscillator ON High power consumption 01/24/2007
PRC envelope
PN data
DSP
rectangular envelope
Proposed CMOS SR pulse radar sensor
Less discrete components No mmWave CW oscillator Low power consumption
ASP DAC 2007
3
Pulse generator block diagram Input D
D
D
D
Output
D
D ：Delay Cell ：Edge Combiner
01/24/2007
ASP DAC 2007
4
Time domain measurement VRFpp=71mV 552ps
PRFpeak=-19dBm Subtracting connection loss (4.6dB)
71mV
VRFpp=120mV 39.2ps
FCC specification Pout= –41.3dBm/MHz Pinst= 0dBm Required PA gain G= 14 ~ 19dB
01/24/2007
ASP DAC 2007
5
Chip summary Chip summary
Core
01/24/2007
ASP DAC 2007
Technology
90nm CMOS
Band
22-29GHz
Modulation
OOK
Supply Voltage
0.91V
Max Data Rate
1 Gbps
Power Consumption
1.4 mW
Core Size
90µm ´ 15µm 6
Conclusion Pseudo mmWave UWB CMOS pulse generator for short range automotive radar application is demonstrated. Up to 1Gbps input data rate, 7GHz wide and 552ps shot pulses with -14dBm output power are generated. 3.19 mW static power dissipation and 1.4pJ/bit which is 100 times less than reported pulse generators. With its simple structure it will open up new application for short range collision avoidance automotive radars with low power consumption and low cost.
01/24/2007
ASP DAC 2007
7
ASP DAC 2007
1
Introduction Front Central control unit
Left side
Right side
Radar CCU
Back
Radar sensor
Short range radar sensor system covering 360o 01/24/2007
360o pre-crash detection Collision warning Blind spot detection Intersection alerts Automatic cruse control Park aid ….. A few cm resolution At least 5GHz Bandwidth Low power Low cost
ASP DAC 2007
2
Proposed CMOS SR radar sensor Conventional transmitter for SR pulse radar sensor
CW input
pulse train
TX pulse width control DSP
This work Pulse Receiver
TX object
RX
CMOS
CMOS
Many discrete components mmWave CW oscillator ON High power consumption 01/24/2007
PRC envelope
PN data
DSP
rectangular envelope
Proposed CMOS SR pulse radar sensor
Less discrete components No mmWave CW oscillator Low power consumption
ASP DAC 2007
3
Pulse generator block diagram Input D
D
D
D
Output
D
D ：Delay Cell ：Edge Combiner
01/24/2007
ASP DAC 2007
4
Time domain measurement VRFpp=71mV 552ps
PRFpeak=-19dBm Subtracting connection loss (4.6dB)
71mV
VRFpp=120mV 39.2ps
FCC specification Pout= –41.3dBm/MHz Pinst= 0dBm Required PA gain G= 14 ~ 19dB
01/24/2007
ASP DAC 2007
5
Chip summary Chip summary
Core
01/24/2007
ASP DAC 2007
Technology
90nm CMOS
Band
22-29GHz
Modulation
OOK
Supply Voltage
0.91V
Max Data Rate
1 Gbps
Power Consumption
1.4 mW
Core Size
90µm ´ 15µm 6
Conclusion Pseudo mmWave UWB CMOS pulse generator for short range automotive radar application is demonstrated. Up to 1Gbps input data rate, 7GHz wide and 552ps shot pulses with -14dBm output power are generated. 3.19 mW static power dissipation and 1.4pJ/bit which is 100 times less than reported pulse generators. With its simple structure it will open up new application for short range collision avoidance automotive radars with low power consumption and low cost.
01/24/2007
ASP DAC 2007
7
