Title :
Modelling and Correction for an Ultra Wide-Band Radar Pulse-Compression Signal Generator
Author :
Shibing Hu ; Xuegang Wang
Author_Institution :
Coll. of Electron. Eng., Chengdu Univ. of Inf. Technol., Chengdu, China
Abstract :
The generation of ultra wide-band (UWB) pulse-compression (PC) signals in modern radar systems is a pivotal technology for microwave imaging, buried targets detection and target identification. The implementation scheme of the UWB PC signal generator, which combines digital baseband generation and bandwidth expansion via frequency multiplication, is introduced firstly in this paper. Then the error models are established from three aspects such as baseband signal generator, I/Q quadrature modulator and frequency multiplying circuit. And a digital predistortion method for eliminating the effect of error signals is derived and proposed. Finally the measured results are given and show that the correction technique can improve the performance of UWB radars considerably.
Keywords :
buried object detection; frequency multipliers; microwave imaging; modulation; modulators; multiplying circuits; pulse compression; radar detection; radar imaging; signal generators; ultra wideband radar; I-Q quadrature modulator; PC; UWB; bandwidth expansion; buried target detection; digital baseband signal generation; digital predistortion method; error signal effect elimination; frequency multiplying circuit; microwave imaging; target identification; ultrawideband radar pulse-compression signal generator; Baseband; Educational institutions; Modulation; Predistortion; Signal generators; Transfer functions; Ultra wideband radar;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2012 8th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-684-2
DOI :
10.1109/WiCOM.2012.6478577
