Event Details
Performance of Orthogonal and Non-Orthogonal TH-PPM for Multi-User UWB Communication Systems
Presenter: Behzad Bahr-Hosseini
Supervisor: Dr. T. Aaron Gulliver
Date: Fri, December 18, 2009
Time: 09:00:00 - 10:00:00
Place: EOW 430
ABSTRACT
Abstract:
The performance of orthogonal pulse position modulation (PPM) and non-orthogonal pulse position modulation (NPPM) is studied and compared over different ultra wideband (UWB) channel models.
Time hopping (TH) has been used to decrease the effect of interference in multi access environments.
Rake receiver is studied as an ideal UWB receiver for multiuser environments. It is shown that an ideal rake (I-Rake) receiver has the best performance among all rake receivers, followed by 5 finger selective rake (5S-Rake), 5 finger partial rake (5P-Rake), 2 finger selective rake (2S-Rake), and 2 finger partial rake (2P-Rake).
It is shown that with a large number of users, NPPM can achieve a better bit error rate (BER) performance than PPM.
It is also shown that PPM and NPPM in a triple Saleh-Valenzuela (TSV) channel has performance similar to that in a Saleh-Valenzuela (SV) channel.