Principles of Communication Systems
Principles of Communication Systems
UWB Transmission and MIMO Antenna Systems for Nomadic Users and Mobile PANs
Wireless Personal Communications: An International Journal
A high-precision ultra wideband impulse radio physical layer model for network simulation
Proceedings of the 2nd International Conference on Simulation Tools and Techniques
Ultra wideband, low-power, 3-5.6GHz, CMOS voltage-controlled oscillator
Microelectronics Journal
FM-UWB for Communications and Radar in Medical Applications
Wireless Personal Communications: An International Journal
Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
An Interfering Signal Detection Technique Using an Ultra Wideband Chirp Template Waveform
Wireless Personal Communications: An International Journal
Chirp Pulse Compression in Non-Coherent Impulse-Radio Ultra-Wideband Communications
Wireless Personal Communications: An International Journal
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This paper presents a novel UWB communications system using double FM: a low-modulation index digital FSK followed by a high-modulation index analog FM to create a constant-envelope UWB signal. FDMA techniques at the subcarrier level are exploited to accommodate multiple users. The system is intended for low (1-10 kbps) and medium (100-1000 kbps) bit rate, and short-range WPAN systems. A wideband delay-line FM demodulator that is not preceded by any limiting amplifier constitutes the key component of the UWBFM receiver. This unusual approach permits multiple users to share the same RF bandwidth. Multipath, however, may limit the useful subcarrier bandwidth to one octave. This paper addresses the performance with AWGN and multipath, the resistance to narrowband interference, as well as the simultaneous detection of multiple FM signals at the same carrier frequency. SPICE and Matlab simulation results illustrate the principles and limitations of this new technology. A hardware demonstrator has been realized and has allowed the confirmation of theory with practical results.