Browse > Article
http://dx.doi.org/10.5573/ieek.2013.50.6.246

Design of A 2-18GHz Digital Frequency Discriminator using Least-squares and Candidate-selection Methods  

Park, Jin Oh (Electronic Warfare R&D Lab., LIG Nex1 Co., Ltd.)
Nam, Sang Won (Department of Electronic Eng., Hanyang Univ.)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.6, 2013 , pp. 246-253 More about this Journal
Abstract
Based on the conventional 2-6GHz digital frequency discriminator (DFD) using the phase unwrapping and least-squares techniques, we propose a new 2-18GHz DFD. To compensate for lowered-precision frequency estimation due to the expanded bandwidth, the proposed DFD design employs more delay lines, accordingly accompanying high complexity. Thus, a new computationally efficient frequency estimation algorithm is also presented to overcome such high computational burden. More specifically, the proposed frequency estimation algorithm is basically based on the conventional phase unwrapping technique, along with a new candidates selection for the unwrapped phases under the condition that the phase margin is known. As a result, the computational burden required for the least-squares technique can be reduced. Finally, simulation results are provided to demonstrate the effectiveness of the proposed approach, compared with those of the conventional DFD's.
Keywords
Electronic warfare; Digital frequency discriminator; Least squares method; Candidate-selection;
Citations & Related Records
연도 인용수 순위
  • Reference
1 P.W. East, "Design techniques and performance of digital IFM," IEE Proc.-F Communications, Radar and Signal Processing, vol. 129, no. 3, pp. 154-163, Jun. 1982.   DOI
2 K. Burns, "Tracking trends in military IFMs and DFDs," Microwaves & RF, June 2009. (http://mwrf.com/military/tracking-trends-military-ifms-and-dfds).
3 L. Xiang, J. Yonghua, Z. Longjun, T. Zhikai, and G. Weiliang, "A new method in DFD design," Proc. Microwave Conf. APMC, Suzhou, China, vol. 1, Dec. 2005.
4 J. Helton, C.H. Chen, D.M. Lin, and J.B.Y. Tsui, "FPGA-Based 1.2 GHz bandwidth digital instantaneous frequency measurement receiver," Proc. 9th ISQED Conf. California, USA, pp. 568-571, Mar. 2008.
5 S. Mahlooji and K. Mohammadi, "Very high resolution digital instantaneous frequency measurement receiver," Proc. Int. Conf. on Signal Processing Systems, Nebraska, USA, pp. 177-181, May 2009.
6 J. Zhou, S. Aditya, P.P. Shum, and J. Yao, "Instantaneous frequency measurement using a photonic microwave filter with an infinite impulse response," IEEE Photonics Technol. Lett., vol. 22, no. 10, pp. 682-684, May 2010.   DOI   ScienceOn
7 J.B.Y. Tsui, Microwave Receivers With Electronic Warfare Applications, Krieger Publishing Co., Malabar, 1992.
8 J.B.Y. Tsui, Instantaneous frequency measure ment receiver with digital processing, U.S. Patent 4633516, Dec. 1986.
9 Wide Band System, Inc., "Digital frequency discriminator," Wide Band System Technical Product Bulletin, no. 104, 1999. (http//www.widebandsystems.com/Digital_Frequency_Discriminators.pdf).
10 E. Slepian, "Estimation of signal parameters in the presence of noise," IRE Trans. Inform. Theory., vol. IT-3, pp. 68-89, Mar. 1957.
11 S.A. Tretter, "Estimating the frequency of a noisy sinusoid by linear regression," IEEE Trans Inform. Theory, vol. IT-31, pp. 832-835, Nov. 1985.
12 S. Kay, "A fast and accurate single frequency estimator," IEEE Trans. Acoustics Speech, Signal Processing, vol. 37, no. 12, pp. 1987-1989, Dec. 1989.   DOI   ScienceOn
13 A.V. Oppenheim and R.W. Schafer, Discrete-Time Signal Processing, Prentice Hall, New Jersey, USA, 1989.
14 A.V. Oppenheim and R.W. Schafer. "From frequency to quefrency: A history of the cepstrum," IEEE Signal Processing Mag., vol. 21, no. 5, pp. 95-106, 2004.   DOI   ScienceOn
15 M.L. Fowler, "Phase-based frequency estimation: A review" Digital Signal Processing, vol. 12, no. 4, pp. 590-615, Elsevier Inc., Ontario, 2002.   DOI   ScienceOn
16 R.G. McKilliam, B.G. Quinn, I.V.L. Clarkson, and B. Moran, "Frequency estimation by phase unwrapping," IEEE Trans. on Signal Processing, vol. 58, no. 6, Jun. 2010.
17 J.O. Park, J.B. Seo, J.H. Kim, and S.W. Nam, "Design of a digital frequency discriminator using least squares based phase calibration," Proc. 2010 SICE Annual Conf., Taipei, Taiwan, pp. 1768-1772, Aug. 2010.
18 S.Y. Park, Y.S. Song, H.J. Kim, and J.S. Park, "Improved method for frequency estimation of sampled sinusoidal signals without iteration," IEEE Trans. on Instrumentation and Measure ment, vol. 60, no. 8, Aug. 2011.
19 W.B. Sullivan, "Gauging limitations on DFD performance," Microwaves & RF, Nov. 2005. (http://mwrf.com/systems/gauging-limitations-dfd-performance)
20 G.C. Liang, C.F. Shih, R.S. Withers, B.F. Cole, and M.E. Johansson, "Space-qualified superconductive digital instantaneous frequency measurement subsystem," IEEE Trans. on Microwave Theory and Techniques, vol. 44, no. 7, Jul. 1996.