Title :
An effect of arrival time differences in space-time coded communication systems
Author :
Ji-won Jung ; Choi, Duk-gun ; Kim, Ki-Man ; Huang, Xinping ; Caron, Mario
Author_Institution :
Dept of Radio Sci. & Eng., Korea Maritime Univ., Pusan, South Korea
Abstract :
One of main goals in developing next generation wireless communication systems is increasing the data rates and high reliability. A promising way to achieve this is combination of multiple-input and multiple-output signal processing with space-time coding scheme. Naguib et al. (1988), Tarokh et al. (1998), and Hammons et al. (2000) proposed several space-time code schemes, which offer higher coding and diversity gains and are suitable for broadband applications to improve the spectrum efficiency and/or reliability of wireless applications such as in-home delivery of HDTV signals for entertainment, or high-speed computer networks based on IEEE 802.11b. In their studies, it is assumed that the multiple transmitter and receiver chains are perfect and that there is no delay or phase error among channels. This assumption, however, is difficult to warrant in practice. The time difference between transmitter and propagation paths from each transmit antenna give rise to arrival time differences in each path, which increase symbol interference and degrade the performance at the mobile receiver units. Therefore, we focus our efforts on the arrival time differences and their effects on a commercially available MIMO systems. Furthermore, we propose a compensation algorithm for a Rayleigh fading model to minimize the effects of arrival time differences.
Keywords :
4G mobile communication; MIMO systems; Rayleigh channels; diversity reception; receiving antennas; signal processing; space-time codes; transmitting antennas; MIMO systems; Rayleigh fading model; arrival time differences; broadband applications; compensation algorithm; diversity gains; mobile receiver units; multiple-input multiple-output signal processing; next generation wireless communication systems; propagation paths; space-time coded communication; symbol interference; transmit antenna; Application software; Computer errors; Computer network reliability; Delay; Diversity methods; HDTV; Signal processing; Space time codes; Transmitters; Wireless communication;
Conference_Titel :
Consumer Electronics, 2005. ICCE. 2005 Digest of Technical Papers. International Conference on
Print_ISBN :
0-7803-8838-0
DOI :
10.1109/ICCE.2005.1429733