Title :
High bit rates for 3G and beyond using MIMO channels
Author :
Hottinen, Ari ; Vesma, Jussi ; Tirkkonen, Olav ; Nefedov, Nikolai
Author_Institution :
Nokia Group, Nokia Res. Center, Espoo, Finland
Abstract :
This paper studies the applicability of selected high rate open-loop space-time codes and closed-loop beamforming concepts for future wireless systems, such as WCDMA/HSDPA. Several spectrally efficient space-time codes are evaluated and their performance is compared to related closed-loop concepts, where a feedback link from the receiver is used to aid (downlink) beamforming. The comparison is based on schemes that attain 4bps/Hz spectral efficiency, where either two parallel QPSK streams or a single 16-QAM stream is transmitted using up to four transmit antennas, and one or two receive antennas.
Keywords :
3G mobile communication; MIMO systems; adaptive antenna arrays; array signal processing; block codes; feedback; quadrature amplitude modulation; quadrature phase shift keying; receiving antennas; space-time codes; transmitting antennas; 16-QAM stream; 3G; MIMO channels; QPSK streams; WCDMA/HSDPA; closed-loop beamforming; downlink beamforming; feedback link; high bit rates; nonorthogonal space-time block codes; open-loop space-time codes; orthogonal space-time block codes; performance; receive antennas; receiver; spectrally efficient space-time codes; transmit antennas; wireless systems; Array signal processing; Bit rate; Downlink; Feedback; MIMO; Multiaccess communication; Quadrature phase shift keying; Receiving antennas; Space time codes; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1047343
