TY - JOUR
T1 - Cyclic delay transmission for unique word OFDM systems
AU - Liao, Mang
AU - Xia, Xiang Gen
AU - Zhang, You Guang
PY - 2014/8
Y1 - 2014/8
N2 - In this article, we propose a cyclic delay diversity (CDD) transmission scheme for unique word (UW) OFDM system, which is denoted as CDD-UW-OFDM. In our proposed CDD-UW-OFDM system, the first transmit antenna transmits a UW-OFDM and then, for every UW-OFDM block, the i-th transmit antenna transmits a cyclically delayed version of the symbols transmitted at the first transmit antenna. With this proposed CDD-OFDM system, each antenna transmission is a UW-OFDM. Also, at the receiver under a certain condition on the cyclic delay amounts, the received signal is equivalent to that of a single transmit antenna UW-OFDM transmission with a longer multipath channel. We design the lengths of UW and cyclic delays to achieve the full multipath and spatial diversities for the CDD-UW-OFDM system when the linear MMSE receiver is used. We then present some simulation results to illustrate the claimed performance of the proposed system.
AB - In this article, we propose a cyclic delay diversity (CDD) transmission scheme for unique word (UW) OFDM system, which is denoted as CDD-UW-OFDM. In our proposed CDD-UW-OFDM system, the first transmit antenna transmits a UW-OFDM and then, for every UW-OFDM block, the i-th transmit antenna transmits a cyclically delayed version of the symbols transmitted at the first transmit antenna. With this proposed CDD-OFDM system, each antenna transmission is a UW-OFDM. Also, at the receiver under a certain condition on the cyclic delay amounts, the received signal is equivalent to that of a single transmit antenna UW-OFDM transmission with a longer multipath channel. We design the lengths of UW and cyclic delays to achieve the full multipath and spatial diversities for the CDD-UW-OFDM system when the linear MMSE receiver is used. We then present some simulation results to illustrate the claimed performance of the proposed system.
KW - MIMO-OFDM systems
KW - cyclic delay diversity (CDD)
KW - frequency-selective fading channels
KW - transmit diversity
KW - unique word (UW)
UR - http://www.scopus.com/inward/record.url?scp=84904561246&partnerID=8YFLogxK
U2 - 10.1007/s11432-014-5093-9
DO - 10.1007/s11432-014-5093-9
M3 - Article
AN - SCOPUS:84904561246
SN - 1674-733X
VL - 57
SP - 1
EP - 9
JO - Science China Information Sciences
JF - Science China Information Sciences
IS - 8
ER -