paper 150305041124

Abstract

In actual digital array radar (DAR) systems, analog components will cause frequency- dependent amplitude and phase mismatch among receive channels. This paper demonstrates the design and implement of the channel equilibration subsystem of an 8-element DAR test-bed. An ultra-wideband waveform generator is designed for generating various calibration signals and the pre-distortion algorithm is presented to compensate for the reconstruction errors. In the receive channels, an improved inverse Fourier Transform algorithm for filter design is investigated in detail based on analysis of real receive channels. The processing results of measured data show the high performance of channel equilibration algorithms.

1. Mir, H. S. and L. Albasha, "A low-cost high-performance digital radar test bed," IEEE Transactions on Instrumentation and Measurement, Vol. 62, No. 1, 221-229, January 2013.
doi:10.1109/tim.2012.2212497 Google Scholar

2. Lu, Q. and X. Wang, "A new Wideband Digital Array Radar (WB-DAR) experiment system," 2014 IEEE Region 10 Symposium, 440-445, April 2014.
doi:10.1109/tenconspring.2014.6863073 Google Scholar

3. Li, T. and X. Wang, "Development of wideband digital array radar," 2013 10th International Computer Conference on Wavelet Active Media Technology and Information Processing (ICCWAMTIP), 286-289, December 2013.
doi:10.1109/iccwamtip.2013.6716650 Google Scholar

4. Pettersson, L. and P. Grahn, "Experiences using DOA methods with a small digital beamforming antenna," IEEE International Symposium on Phased Array Systems and Technology, 164-169, 2003.
doi:10.1109/past.2003.1256975 Google Scholar

5. Cantrell, B., J. de Graaf, L. Leibowitz, F. Willwerth, G. Meurer, C. Parris, and R. Stapleton, "Development of a digital array radar (DAR)," IEEE Aerospace and Electronic Systems Magazine, Vol. 17, No. 3, 22-27, 2002.
doi:10.1109/nrc.2001.922970 Google Scholar

6. Wang, F., Y. Fu, B. Meng, and L. Chen, "Performance analysis and improvement of the equalization algorithm based on fourier transform for radar channel," EIACTA Electronic Sinica, Vol. 34, No. 9, 1677-1680, 2006. Google Scholar

7. Zhang, Y., Q. Bao, and J. Yang, "Design and implementation of channel equalization method for wideband digital array radar," Signal Processing, Vol. 26, No. 3, 453-457, 2010. Google Scholar

8. Saville, M. A., K. Monroe, C. Allen, and R. Martin, "Processing-based tuner gain correction in a wideband multi-channel receiver," 2010 IEEE Radarl Conference, 1106-1110, 2010.
doi:10.1109/radar.2010.5494456 Google Scholar

9. Kim, S.-Y. and N.-H. Myung, "Wideband linear frequency modulated waveform compensation using system predistortion and phase coefficients extraction method," IEEE Microwave and Wireless Components Letters, Vol. 17, No. 11, 808-810, November 2007.
doi:10.1109/lmwc.2007.908061 Google Scholar

Zengping Chen

Weixing Li

Jianzhi Lin

Biao Tian

Weihua Wang