10 research outputs found
A Simulator For Differential Msk Direct Sequence Spread Spectrum
No full textIn this poster we shall present a simulator developed for complete simulation of a D-MSK DSSS (Differential Minimum Shift Keying Direct Sequence Spread Spectrum) system which operates in a multipath AWGN (Additive White Gaussian Noise) channel. The simulator is "complete" in the sense that it simulates the transmitter, the channel, and the receiver. This includes precise simulation of the various synchronization loops in the receiver, ability to simulate a virtually unlimited number of multipath interferers with arbitrary amplitudes, and complete control over the parameters of the communications link. The simulator is operated through a Matlab GUI (Graphical User Interface) which runs proprietary code written in Matlab. In addition to discussing the simulator itself, we shall also outline one of the unique applications of the simulation program, which is in the development of a novel technique for acoustic travel-time measurement in geophysical exploration
Progress on Ultra-Wideband (UWB) Multi-Antenna radar imaging for MIGA
No full textProgress on the development of the multi-channel, ground penetrating radar imaging system is presented from hardware and software perspectives. A new exponentially tapered slot antenna, with an operating bandwidth from 100 MHz to 1.5 GHz was fabricated and tested using the eight-port vector network analyzer, designed by Rhode and Schwarz Incorporated for this imaging project. An eight element antenna array mounted on two carts with automatic motor drive, was designed for optimal common midpoint (CMP) data acquisition. Data acquisition scenarios were tested using the acoustic version of the NORSAR2D seismic ray-tracing software. This package enables the synthesis and analysis of multi-channel, multi-offset data acquisitions comprising more than a hundred thousand traces. Preliminary processing is in good agreement with published bistatic ground-penetrating radar images obtained in the tunnels of the Low-noise Underground Laboratory (LSBB) at Rustrel, France
Progress on Ultra-Wideband (UWB) Multi-Antenna radar imaging for MIGA
No full textProgress on the development of the multi-channel, ground penetrating radar imaging system is presented from hardware and software perspectives. A new exponentially tapered slot antenna, with an operating bandwidth from 100 MHz to 1.5 GHz was fabricated and tested using the eight-port vector network analyzer, designed by Rhode and Schwarz Incorporated for this imaging project. An eight element antenna array mounted on two carts with automatic motor drive, was designed for optimal common midpoint (CMP) data acquisition. Data acquisition scenarios were tested using the acoustic version of the NORSAR2D seismic ray-tracing software. This package enables the synthesis and analysis of multi-channel, multi-offset data acquisitions comprising more than a hundred thousand traces. Preliminary processing is in good agreement with published bistatic ground-penetrating radar images obtained in the tunnels of the Low-noise Underground Laboratory (LSBB) at Rustrel, France
Progress on Ultra-Wideband (UWB) Multi-Antenna radar imaging for MIGA
No full textProgress on the development of the multi-channel, ground penetrating radar imaging system is presented from hardware and software perspectives. A new exponentially tapered slot antenna, with an operating bandwidth from 100 MHz to 1.5 GHz was fabricated and tested using the eight-port vector network analyzer, designed by Rhode and Schwarz Incorporated for this imaging project. An eight element antenna array mounted on two carts with automatic motor drive, was designed for optimal common midpoint (CMP) data acquisition. Data acquisition scenarios were tested using the acoustic version of the NORSAR2D seismic ray-tracing software. This package enables the synthesis and analysis of multi-channel, multi-offset data acquisitions comprising more than a hundred thousand traces. Preliminary processing is in good agreement with published bistatic ground-penetrating radar images obtained in the tunnels of the Low-noise Underground Laboratory (LSBB) at Rustrel, France
