Special issue on emerging multiple access technologies Abstract This paper investigates the use of bi-orthogonal modulations in multiuser communication systems based on ultra wide band impulse radio (UWB-IR) technology: the communication systems considered herein use Gaussian waveforms in AWGN channel and rely on the utilization of a time-hopping spreading technique. A hybrid pulse modulation is defined, which is obtained by combining pulse amplitude modulation (PAM) and pulse position modulation (PPM) techniques. Particularly, we have compared the bi-orthogonal system performance to the classical orthogonal one, also in the condition of lack of a general synchronism, possibly caused by the presence of interfering users that belong to a separate network. Moreover, we have taken into account the use of an M-ary alphabet, in the case of orthogonal and bi-orthogonal modulation schemes.
Performance of the Bi-orthogonal Modulation for Ultra-WideBand Communications with Multiple Access Interference / S. MOROSI; R. FANTACCI; E. DEL RE; L. GORATTI. - In: WIRELESS COMMUNICATIONS AND MOBILE COMPUTING. - ISSN 1530-8669. - STAMPA. - 5:(2005), pp. 5-14. [10.1002/wcm.283]
Performance of the Bi-orthogonal Modulation for Ultra-WideBand Communications with Multiple Access Interference
MOROSI, SIMONE;FANTACCI, ROMANO;DEL RE, ENRICO;
2005
Abstract
Special issue on emerging multiple access technologies Abstract This paper investigates the use of bi-orthogonal modulations in multiuser communication systems based on ultra wide band impulse radio (UWB-IR) technology: the communication systems considered herein use Gaussian waveforms in AWGN channel and rely on the utilization of a time-hopping spreading technique. A hybrid pulse modulation is defined, which is obtained by combining pulse amplitude modulation (PAM) and pulse position modulation (PPM) techniques. Particularly, we have compared the bi-orthogonal system performance to the classical orthogonal one, also in the condition of lack of a general synchronism, possibly caused by the presence of interfering users that belong to a separate network. Moreover, we have taken into account the use of an M-ary alphabet, in the case of orthogonal and bi-orthogonal modulation schemes.File | Dimensione | Formato | |
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Performance of the bi-orthogonal modulation for ultra-wideband communication systems with multiple access interference.pdf
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