A Variable Sample Rate Recursive Arithmetic Half Band Filter for SDR-based Digital Satellite Transponders

Title & Authors
A Variable Sample Rate Recursive Arithmetic Half Band Filter for SDR-based Digital Satellite Transponders
Baek, Dae-Sung; Lim, Won-Gyu; Kim, Chong-Hoon;

Abstract
Due to the limited power supply resources, it is essential that the minimization of algorithmic operation and the reduction of the hardware logical-resources in the design of the satellite transponder. It is also required that the transponder process the signals of various bandwidth efficiently, that is suitble for the SDR-based implementation. This paper proposes a variable rate down sampler which can provide variable bandwidth and data rate for carrier, ranging and sub-band command signals respectively. The proposed down sampler can provide multiple $\small{2^M}$ decimated outputs from a single half band filter with recursive arithmetic architecture, which can minimize the hardware resources as well as the arithmetic operations. The algorithm for hardware implementation as well as the analysis for the passband flatness and aliasing is presented and varified by the FPGA implementation.
Keywords
Half Band Filter;Recursive Arithmetic;SDR;Transponder;Filter Chain;
Language
Korean
Cited by
References
1.
P. P. Vaidyanathan and T. Q. Nguyen, "A trick for the design of FIR half-band filters," IEEE Trans. Circuits Syst., vol. 34, no. 3, pp. 297-300, Mar. 1987.

2.
P. P. Vaidyanathan, Multirate Systems and Filter Banks, Prentice Hall, 1993.

3.
R. E. Crochiere and L. R. Rabiner, Multirate Digital Signal Processing, Prentice Hall, 1983.

4.
J.B erner et al., "The NASA Spacecraft Transponding Modem", Aero space Conference Proceedings, 2000 IEEE, Vol.7 ,pp. 195-209, March, 2000

5.
L. Simone et al. "A novel digital platform for deep space transponders: the receiver side." Proc. of IEEE 2004 Aerospace Conference, vol. 03, pp. 1432-1445, Feb, 2004.

6.
K.-N. Seo, S.-W. Choi, and C.-H. Kim, "A SNR estimation algorithm for digital satellite transponder," J. Korea Infom. Commun. Soc. (KICS), vol. 35, no. 9, pp. 729-734, Jan, 2010.