We present a software-defined data fusion system which integrates both radar (sensing) function and radio (communication) function within a single transceiver platform. In the proposed architecture, the radar mode and the radio mode operate in different time slots. The required modulated waveform is generated with the help of a direct digital synthesizer (DDS) that is able to control signal parameters such as amplitude, frequency and phase with very high resolution. For the radar mode, a specially arranged trapezoidal frequency modulation continuous-wave (TFMCW) modulation scheme is adopted, which combines three time intervals, namely an up-chirp, a constant-frequency period and a down-chirp. As such, range-velocity ambiguity can be resolved. Moreover, a constant-frequency period follows the radar cycle in the transmitted signal, which can be encoded with information data using different modulation schemes such as ASK, FSK, PSK, and some combinations among them. A low-frequency prototype for the 5.9-GHz dedicated short range communication (DSRC) system was designed and prototyped. Both system simulation results and preliminary measurement results have proved the proposed concept. The presented system has demonstrated such advantages as low cost, low complexity, and versatile functionality, which promises to play an important role in the design of future intelligent transportation system.
[1]
M. Skolnik,et al.
Introduction to Radar Systems
,
2021,
Advances in Adaptive Radar Detection and Range Estimation.
[2]
J. Janssen,et al.
FMCW radar with broadband communication capability
,
2007,
2007 European Radar Conference.
[3]
Richard Bishop,et al.
Intelligent Vehicle Technology and Trends
,
2005
.
[4]
Fan Bai,et al.
Mobile Vehicle-to-Vehicle Narrow-Band Channel Measurement and Characterization of the 5.9 GHz Dedicated Short Range Communication (DSRC) Frequency Band
,
2007,
IEEE Journal on Selected Areas in Communications.
[5]
A. Stelzer,et al.
Precise distance measurement with cooperative FMCW radar units
,
2008,
2008 IEEE Radio and Wireless Symposium.
[6]
E.R. Brown,et al.
Ultra-Wideband Multifunctional Communications/Radar System
,
2007,
IEEE Transactions on Microwave Theory and Techniques.
[7]
Tetsuo Kirimoto,et al.
TARGET DISTANCE AND VELOCITY MEASUREMENT ALGORITHM TO REDUCE FALSE TARGETS IN FMCW AUTOMOTIVE RADAR
,
2000
.
[8]
J. Detlefsen,et al.
Automotive 24 GHz pulse radar extended by a DQPSK communication channel
,
2007,
2007 European Radar Conference.
[9]
John G. Proakis,et al.
Digital Communications
,
1983
.