Realization of a Sliding-Correlator-Based Continuous-Wave Pseudorandom Binary Phase-Coded Radar Operating in $W$ -Band

In this paper, we present a continuous-wave (CW) mm-wave radar, which is based on binary phase-coded pseudorandom signals. The receiving section is operated as a sliding correlator, which allows to greatly reduce the bandwidth required in the baseband blocks of the system. A certain class of pseudorandom sequences, with so-called almost perfect autocorrelation properties, is used as probing signal. This leads to a good dynamic range, even for short sequence lengths. The presented hardware is based on a SiGe front-end chip, which includes a frequency multiplier to generate a 79-GHz carrier from a fixed-frequency source operating at 4.39 GHz. A field-programmable gate array generates the binary sequences with a bit rate of 1 Gb/s. This sequence is modulated onto the W-band carrier by binary phase-shift keying modulators realized within the SiGe chip. In this way, a flexible prototype was realized that was used to perform different radar experiments ranging from static single-target scenarios to range-Doppler measurements with multiple targets. It could be shown that the realized pseudorandom radar achieves a range resolution of 15 cm and ranging standard deviations in the millimeter range. This is comparable to frequency-modulated CW measurements with a bandwidth of 2 GHz, which were carried out using the same hardware for comparison purposes.

[1]  Jeng-Han Tsai,et al.  A Digital-Calibrated Transmitter-to-Receiver Isolator in Radar Applications , 2012, IEEE Microwave and Wireless Components Letters.

[2]  Gang Chen,et al.  Almost perfect sequences applied for ionospheric oblique backscattering detection , 2009 .

[3]  André Bourdoux,et al.  A 79 GHz Phase-Modulated 4 GHz-BW CW Radar Transmitter in 28 nm CMOS , 2014, IEEE Journal of Solid-State Circuits.

[4]  A. Tomkins,et al.  A Zero-IF 60 GHz 65 nm CMOS Transceiver With Direct BPSK Modulation Demonstrating up to 6 Gb/s Data Rates Over a 2 m Wireless Link , 2009, IEEE Journal of Solid-State Circuits.

[5]  S. Brebels,et al.  Almost perfect auto-correlation sequences for binary phase-modulated continuous wave radar , 2013, 2013 European Microwave Conference.

[6]  Robert B. Staszewski,et al.  A 56.4-to-63.4 GHz Multi-Rate All-Digital Fractional-N PLL for FMCW Radar Applications in 65 nm CMOS , 2014, IEEE Journal of Solid-State Circuits.

[7]  M. Vossiek,et al.  Frequency-sweep linearization for FMCW sensors with high measurement rate , 2005, IEEE MTT-S International Microwave Symposium Digest, 2005..

[8]  Franz Dielacher,et al.  SiGe BiCMOS technology and circuits for active safety systems , 2014, Technical Papers of 2014 International Symposium on VLSI Design, Automation and Test.

[9]  V. Ipatov.  Spread Spectrum and CDMA: Principles and Applications , 2005 .

[10]  André Bourdoux,et al.  19.7 A 79GHz binary phase-modulated continuous-wave radar transceiver with TX-to-RX spillover cancellation in 28nm CMOS , 2015, 2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers.

[11]  H. Hatano,et al.  Automotive Ultrasonic Array Emitter for Short-range Targets Detection , 2007, 2007 4th International Symposium on Wireless Communication Systems.

[12]  Andrew Gerald Stove,et al.  Linear FMCW radar techniques , 1992 .

[13]  Jürgen Sachs,et al.  Handbook of Ultra-Wideband Short-Range Sensing: Theory, Sensors, Applications , 2012 .

[14]  R. A. Campbell,et al.  An overview of frequency synthesizers for radars , 1991 .

[15]  Reinhard Feger,et al.  A fully-integrated 77-GHz pseudo-random noise coded Doppler radar sensor with programmable sequence generators in SiGe technology , 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

[16]  T. Zwick,et al.  Millimeter-Wave Technology for Automotive Radar Sensors in the 77 GHz Frequency Band , 2012, IEEE Transactions on Microwave Theory and Techniques.

[17]  Jri Lee,et al.  A Fully-Integrated 77-GHz FMCW Radar Transceiver in 65-nm CMOS Technology , 2010, IEEE Journal of Solid-State Circuits.

[18]  Reinhard Feger,et al.  Millimeter-wave phase-coded CW MIMO radar using zero-correlation-zone sequence sets , 2015, 2015 IEEE MTT-S International Microwave Symposium.

[19]  O.A.M. Aly,et al.  New implementation of the correlation function of the PN code for application in automotive radars , 2003, IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450).

[20]  Reinhard Feger,et al.  A Fully-Integrated 77-GHz UWB Pseudo-Random Noise Radar Transceiver With a Programmable Sequence Generator in SiGe Technology , 2014, IEEE Transactions on Circuits and Systems I: Regular Papers.

[21]  Mario Huemer,et al.  Short-Range Leakage Cancelation in FMCW Radar Transceivers Using an Artificial On-Chip Target , 2015, IEEE Journal of Selected Topics in Signal Processing.

[22]  Dieter Jungnickel,et al.  Perfect and Almost Perfect Sequences , 1999, Discret. Appl. Math..

[23]  Greg Durgin,et al.  Revisiting the spread spectrum sliding correlator: why filtering matters , 2009, IEEE Transactions on Wireless Communications.

[24]  Charles E. Cook,et al.  Radar Signals: An Introduction to Theory and Application , 1967 .

[25]  J. Dunsmore.  Introduction to Microwave Measurements , 2012 .

[26]  Alexander Pott,et al.  Existence and nonexistence of almost-perfect autocorrelation sequences , 1995, IEEE Trans. Inf. Theory.

[27]  Greg Durgin,et al.  Optimal Sliding Correlator Channel Sounder Design , 2008, IEEE Transactions on Wireless Communications.

[28]  Andreas Stelzer,et al.  A millimeter-wave transition from microstrip to waveguide using a Differential Microstrip Antenna , 2010, The 40th European Microwave Conference.

[29]  Dian T. Nugraha,et al.  Integrated FFT accelerator and inline bin-rejection for automotive FMCW radar signal processing , 2015, 2015 European Radar Conference (EuRAD).

[30]  Yuanxun Ethan Wang,et al.  A $Ka$-Band FMCW Radar Front-End With Adaptive Leakage Cancellation , 2006, IEEE Transactions on Microwave Theory and Techniques.

[31]  D. Cox.  Delay Doppler characteristics of multipath propagation at 910 MHz in a suburban mobile radio environment , 1972 .

[32]  Reinhard Feger,et al.  A fully-integrated 77-GHz radar transceiver using two programmable pseudo-random sequences , 2014, 2014 11th European Radar Conference.

[33]  V. Filimon,et al.  A pre-crash radar sensor system based on pseudo-noise coding , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[34]  Rajanish,et al.  A single-chip 24 GHz SiGe BiCMOS transceiver for low cost FMCW airborne radars , 2009, Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON).

[35]  Tang-Nian Luo,et al.  A 77-GHz CMOS FMCW Frequency Synthesizer With Reconfigurable Chirps , 2013, IEEE Transactions on Microwave Theory and Techniques.

[36]  Alexander Fischer,et al.  A DLL-Supported, Low Phase Noise Fractional-N PLL With a Wideband VCO and a Highly Linear Frequency Ramp Generator for FMCW Radars , 2013, IEEE Transactions on Circuits and Systems I: Regular Papers.

[37]  Donald E. Barrick,et al.  FM/CW Radar Signals and Digital Processing , 1973 .

[38]  E. Skafidas,et al.  Consumer radar: Opportunities and challenges , 2014, 2014 11th European Radar Conference.

[39]  J. Detlefsen,et al.  Spread spectrum ranging for an ACC-radar , 1998, 1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333).

[40]  W. Menzel,et al.  An Experimental 24 GHz Radar using Phase Modulation Spread Spectrum Techniques , 1998, 1998 28th European Microwave Conference.

[41]  A. Stelzer,et al.  Signal model and statistical analysis for the sequential sampling pulse radar technique , 2008, 2008 IEEE Radar Conference.