Title :
Performance of space-time block coding and space-time trellis coding for impulse radio
Author :
Héliot, Fabien ; Ghavami, M. ; Nakhai, R. ; Aghvami, A.H.
Author_Institution :
King´´s Coll. London, London Univ., UK
fDate :
29 Nov.-3 Dec. 2004
Abstract :
Ultra wideband (UWB) systems have attracted a lot of research interest lately, owing to their appealing features in short-range mobile communications. These features include low power peer-to-peer transmissions, multiple access communications, high data rates, and precise positioning capabilities. Space-time coding (STC) techniques, such as the block coding scheme, or the trellis coding scheme, are known to be simple and practical ways to increase the spectral efficiency in wireless communications. We aim to combine a pulse position modulation (PPM) impulse radio multiple access (IRMA) system with two different space-time coding techniques. Thus, we developed a space-time block code scheme and adapted a space-time trellis code scheme to UWB signalling, relying on the channel state information (CSI) at the receiver side. Then the added diversity produced by these techniques is exploited to enhance the performance of UWB systems. Analysis is conducted in a typical UWB environment, with fractionally-spaced (FS) coherent RAKE detection.
Keywords :
block codes; diversity reception; mobile radio; multi-access systems; pulse position modulation; signal detection; space-time codes; telecommunication signalling; trellis codes; ultra wideband communication; CSI; PPM; channel state information; fractionally-spaced coherent RAKE detection; high data rates; impulse radio; impulse radio multiple access; multiple access communications; peer-to-peer transmissions; precise positioning; pulse position modulation; receiver; short-range mobile communications; space-time block coding; space-time coding; space-time trellis coding; ultra wideband communication; Block codes; Channel state information; Convolutional codes; Mobile communication; Modulation coding; Peer to peer computing; Pulse modulation; RAKE receivers; Ultra wideband technology; Wireless communication;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1378946