tailieunhanh - Báo cáo hóa học: " Research Article Optimized Punctured ZCZ Sequence-Pair Set: Design, Analysis, and Application to Radar System"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Optimized Punctured ZCZ Sequence-Pair Set: Design, Analysis, and Application to Radar System | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 254837 9 pages doi 2010 254837 Research Article Optimized Punctured ZCZ Sequence-Pair Set Design Analysis and Application to Radar System Lei Xu and Qilian Liang EURASIP Member Department of Electrical Engineering University of Texas at Arlington Arlington TX76010 USA Correspondence should be addressed to Lei Xu xu@ Received 23 November 2009 Accepted 26 April 2010 Academic Editor Xiuzhen Susan Cheng Copyright 2010 L. Xu and Q. Liang. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Based on the zero correlation zone ZCZ concept we present the definitions and properties of a set of new ternary codes ZCZ sequence-Pair Set ZCZPS and propose a method to use the optimized punctured sequence-pair along with Hadamard matrix to construct an optimized punctured ZCZ sequence-pair set OPZCZPS which has ideal autocorrelation and cross-correlation properties in the zero correlation zone. Considering the moving target radar system the correlation properties of the codes will not be severely affected when Doppler shift is not large. We apply the proposed codes as pulse compression codes to radar system and the simulation results show that optimized punctured ZCZ sequence-pairs outperform other conventional pulse compression codes such as the well-known polyphase code P4 code. 1. Introduction Pulse compression is known as a technique to raise the signal to maximum sidelobe signal-to-sidelobe ratio to improve the target detection and range resolution abilities of the radar system. This technique allows a radar to simultaneously achieve the energy of a long pulse and the resolution of a short pulse without the high peak power which is required by a high energy short duration pulse 1 . One of the