volume | PIER Journals

Abstract

Wideband digital beamforming (WDBF) technology is a key for the rapidly developing wideband digital array radar (WDAR). In this paper,by comprehensively considering the characteristics of WDAR and the current hardware and software capabilities for radar in engineering, several practical WDBF technologies based on accurate digital true time delay (TTD) are studied. WDBF technology at radio frequency (RF) is applied and tested on a WDAR test-bed. Besides, WDBF technologies at baseband by implementing fractional delay filers at element level and subarray level are presented and simulated.

1. Cantrell, B., "Development of a digital array radar (DAR)," IEEE Aerospace and Electronic Systems Magazine, Vol. 17, No. 3, 22-27, 2002.
doi:10.1109/62.990350

2. Fulton, C., P. Clough, and V. Pai, "A digital array radar with a hierarchical system architecture," 2009 IEEE MTT-S International Microwave Symposium Digest, 89-92, Boston, 2009.

3. Chappell, W. and C. Fulton, "Digital array radar panel development," 2010 IEEE International Symposium on Phased Array Systems and Technology, 50-60, Waltham, 2010.

4. Tarran, C., "Advances in affordable digital array radar," 2008 IET Waveform Diversity and Digital Radar Conference, 1-6, London, 2008.

5. Rabideau, D. J., R. J. Galejs, F. G. Willwerth, and D. S. McQueen, "An S-band digital array radar testbed," Proceedings of 2003 IEEE International Symposium on Phased Array Systems and Technology, 113-118, Boston, Oct. 2003.

6. Samborski, R. and M. Ziólko, "Filter-based model of multimicrophone array in an adverse acoustic environment," Engineering Letters, Vol. 20, No. 4, 2012.

7. Dyadyuk, V., X. J. Huang, L. Stokes, and J. Pathikulangara, "Implementation of wideband digital beamforming in the E-band: Towards a hybrid array," Proc. Int. Conf. European Microwave Conference, 914-917, Paris, France, Sep. 2010.

8. Bucris, Y., I. Cohen, and M. A. Doron, "Bayesian focusing for coherent wideband beamforming," IEEE Transas. Audio, Speech, Signal Processing, Vol. 20, No. 4, 1282-1296, 2012.
doi:10.1109/TASL.2011.2175384

9. Mir, H. S. and L. Albasha, "A low-cost high-performance digital radar test bed," IEEE Trans. Instrumentation and Measurement, Vol. 62, No. 1, 221-229, Jan. 2013.
doi:10.1109/TIM.2012.2212497

10. Fischman, M. A. and C. Le, "Digital beamforming developments for the joint NASA/Air Force space based radar," Proc. IEEE Int. Symp. Geosicence and Remote Sensing Symposium, 687-690, Anchorage, AK, Sep. 2004.

11. Chen, Y. H. and R. T. Chen, "A fully packaged true time delay module for a K-band phased array antenna system demonstration," IEEE Photonics Technology Letters, Vol. 14, No. 8, 1175-1177, 2002.
doi:10.1109/LPT.2002.1022009

12. Tur, M., "True time delay photonic beamforming: A review," IEEE Int. Conf. Microwave, Communications, Antennas and Electronics Systems, 1-2, Tel Aviv, Nov. 2009.

13. Xing, L., M. Kintis, C. Hansen, W. Chan, G. Tseng, and M. Tan, "A simple DC to 110 GHz MMIC true time delay line," IEEE Microwave and Wireless Components Letters, Vol. 22, No. 7, 369-371, 2012.
doi:10.1109/LMWC.2012.2200099

14. Weedon, W. H., "Phased array digital beamforming hardware development at applied radar," Proceeding of IEEE Int. Symp. on Phased Array Systems and Technology, 854-859, Waltham, MA, Oct. 2010.

15. Laakso, T. I., V. Valimaki, M. Karjalainen, and U. K. Laine, "Splitting the unit delay: Tool for fractional delay filter design," IEEE Signal Process. Mag., Vol. 13, No. 1, 30-60, 1996.
doi:10.1109/79.482137

Dr. Mingxin Liu

Dr. Lin Zou

Dr. Xuegang Wang