@inproceedings{nguyen_tran_wang_coons_nguyen_lane_pham_chen_wang_2016, title={RFI modeling and prediction approach for SATOP applications: RFI prediction models}, volume={9838}, ISSN={["0277-786X"]}, url={http://dx.doi.org/10.1117/12.2223518}, DOI={10.1117/12.2223518}, abstractNote={This paper describes a technical approach for the development of RFI prediction models using carrier synchronization loop when calculating Bit or Carrier SNR degradation due to interferences for (i) detecting narrow-band and wideband RFI signals, and (ii) estimating and predicting the behavior of the RFI signals. The paper presents analytical and simulation models and provides both analytical and simulation results on the performance of USB (Unified S-Band) waveforms in the presence of narrow-band and wideband RFI signals. The models presented in this paper will allow the future USB command systems to detect the RFI presence, estimate the RFI characteristics and predict the RFI behavior in real-time for accurate assessment of the impacts of RFI on the command Bit Error Rate (BER) performance. The command BER degradation model presented in this paper also allows the ground system operator to estimate the optimum transmitted SNR to maintain a required command BER level in the presence of both friendly and un-friendly RFI sources.}, booktitle={Sensors and Systems for Space Applications IX}, publisher={SPIE}, author={Nguyen, Tien M. and Tran, Hien T. and Wang, Zhonghai and Coons, Amanda and Nguyen, Charles C. and Lane, Steven A. and Pham, Khanh D. and Chen, Genshe and Wang, Gang}, editor={Pham, Khanh D. and Chen, GensheEditors}, year={2016}, month={May} }
 @inproceedings{nguyen_tran_wang_coons_nguyen_lane_pham_chen_wang_2015, title={RFI modeling and prediction approach for SATOPS applications}, volume={9469}, ISSN={["1996-756X"]}, url={http://dx.doi.org/10.1117/12.2177955}, DOI={10.1117/12.2177955}, abstractNote={This paper describes innovative frameworks to develop RFI modeling and prediction models for (i) estimating the RFI characteristics, (ii) evaluating effectiveness of the existing Unified S-Band (USB) command waveforms employed by civil, commercial and military SATOPS ground stations, and (iii) predicting the impacts of RFI on USB command systems. The approach presented here will allow the communications designer to characterize both friendly and unfriendly RFI sources, and evaluate the impacts of RFI on civil, commercial and military USB SATOPS systems. In addition, the proposed frameworks allow the designer to estimate the optimum transmitted signal power to maintain a required USB SATOPS Quality-of-Service (QoS) in the presence of both friendly and unfriendly RFI sources.}, booktitle={Sensors and Systems for Space Applications VIII}, publisher={SPIE}, author={Nguyen, Tien M. and Tran, Hien T. and Wang, Zhonghai and Coons, Amanda and Nguyen, Charles C. and Lane, Steven A. and Pham, Khanh D. and Chen, Genshe and Wang, Gang}, editor={Pham, Khanh D. and Chen, GensheEditors}, year={2015}, month={May} }