Study of LDPC Coded SFH System with Partial-Band Interference
- 1 College of communications engineering PLA University of Science &Technology, China
- 2 The State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics&Information System, China
- 3 College of communications engineering PLA University of Science &Technology, China
- 4 College of communications engineering PLA University of Science &Technology, China
Abstract
The application of Low Density Parity Check (LDPC) code in the anti-interference systems has drawn an increasing attention, due to its admiring performance which is very close to the theory limit. This paper focuses on a LDPC encoded slow frequency hopping (SFH) communication system with partial-band interference. Firstly, a modified soft- decision algorithm based on the utilization of interference information is proposed, and its performance is compared with some other soft-decision methods. Secondly, with numerical simulation, the influence of code rate, code length and the number of symbols per hops on the performance of the system with partial band noise interference is illustrated and examined in detail. Considering the great influence of hops per symbol on the performance, interleaver should be used and its influence on the performance is further examined by simulation. Finally, some constructive advises for the design of LDPC coded SFH system are given. Simulation results show that, with a reasonable design, the SFH system with LDPC code could achieve a desirable performance.
- D. Torrieri, S. Cheng and M. C. Valenti, “Robust Frequency Hopping for Interference and Fading Channels,” IEEE Transactions on Communications, Vol. 56, No. 8, August 2008, pp. 1343-1351
- P. Popovski, H. Yomo and R. Prasad, “Strategies for Adaptive Frequency Hopping in the Unlicensed Bands,” IEEE Wireless Communications, December 2006, pp. 60-67
- K. L. B. Cook, “Current Wideband MILSATCOM Infrastructure and the Future of Bandwidth Availability,” IEEE A&E Systems Magazine, December 2010, pp. 23-28
- W. Hu, D. Willkomm, L. Chu, M. Abusubaih, J. Gross, G. Vlantis, M. Gerla and A. Wolisz, “Dynamic Frequency Hopping Communities for Efficient IEEE 802.22 Operation,” IEEE Commun. Mag., Special Issue: Cognitive Radios for Dynamic Spectrum Access, Vol. 45, No. 5, pp. 80-87.
- X. F. Wu, C. M. Zhao, X. H. You and S. Q. Li, “Robust Diversity-Combing Receivers for LDPC Coded FFH-SS with Partial-Band Interference,” IEEE Communications Letters, Vol. 11, No. 7, July 2007, pp. 613-615.
- Y. H. Kim, K. S. Kim and J. Y. Ahn, “Erasure Decoding for LDPC-coded FH-OFDMA System in Downlink Cellular Environments,” Electronics Letters 28th, 2004, Vol. 40, No. 22. doi:10.1049/el:20046043
- L.-D. Jeng, S.-S. Lee, C.-H. Wang and F.-B. Ueng, “Low-Density Parity-Check Codes for FFH/BFSK Systems with Partial-Band Noise Interference,” IWCMC’06, July 3–6, 2006, Vancouver, British Columbia, Canada, pp. 1213-1217
- L.-D. Jeng, S.-S. Lee, C.-H. Wang and F.-B. Ueng, “Performance of Low-Density Parity-Check Coded FFH/BFSK Systems under Band Multitone Interference,” IWCMC’07, August 12-16, 2007, Honolulu, Hawaii, USA, pp. 434-438.
- A. Ashikhmin, G. Kramer and S. ten Brink, “Extrinsic Information Transfer Functions: Model and Erasure Channel Properties,” IEEE Transactions Information Theory, Vol. 50, 2004, pp. 2657-2673. doi:10.1109/TIT.2004.836693
- G. Liva, W. E. Ryan and M. Chiani, “Quasi-Cyclic Generalized LDPC Codes with Low Error Floors,” IEEE Transactions on Communications, Vol. 56, No. 1, January, 2008, pp. 49-57.
- M. B. Pursley, Fellow, IEEE and J. S. Skinner, “Adaptive Coding for Frequency-Hop Transmission in Mobile Ad Hoc Networks with Partial-Band Interference,” IEEE Transactions on Communications, Vol. 57, No. 3, MARCH 2009, pp. 801-811.
- D. R. Pauluzzi and N. C. Beaulieu, “A Comparison of SNR Estimation Techniques for the AWGN Channel, IEEE Transactions On Communications, Vol. 48, No. 10, 2000, pp. 1681-1691.