TY - GEN
T1 - An equalization technique based on QR decomposition for DSTBC-OFDM systems with distributed carrier frequency offsets
AU - Kim, Jaehwan
AU - Song, Hyungjoon
AU - Park, Sungsoo
AU - You, Cheolwoo
AU - Kwun, Young Hoon
AU - Hong, Daesik
PY - 2007
Y1 - 2007
N2 - In the distributed space-time block coded (DSTBC) orthogonal frequency division multiplexing (OFDM) system (DSTBC-OFDM), there may exist distributed carrier frequency offsets (CFOs) by sharing the transmission antennas belonging to different nodes. In this paper, the signal model of the DSTBC-OFDM system with distributed CFOs is presented. Then we propose a new equalization technique via the modification of the QR decomposition (MQRD) in order to eliminate ICI and ISI which are caused by CFOs. The proposed MQRD scheme guarantees transmit diversity gain. Several kinds of equalization techniques are introduced and compared in terms of bit error rate (BER) performance and transmit diversity order. Simulation results show that the proposed method outperforms conventional equalization techniques and achieves equal transmit diversity order with perfectly synchronized DSTBC-OFDM system.
AB - In the distributed space-time block coded (DSTBC) orthogonal frequency division multiplexing (OFDM) system (DSTBC-OFDM), there may exist distributed carrier frequency offsets (CFOs) by sharing the transmission antennas belonging to different nodes. In this paper, the signal model of the DSTBC-OFDM system with distributed CFOs is presented. Then we propose a new equalization technique via the modification of the QR decomposition (MQRD) in order to eliminate ICI and ISI which are caused by CFOs. The proposed MQRD scheme guarantees transmit diversity gain. Several kinds of equalization techniques are introduced and compared in terms of bit error rate (BER) performance and transmit diversity order. Simulation results show that the proposed method outperforms conventional equalization techniques and achieves equal transmit diversity order with perfectly synchronized DSTBC-OFDM system.
UR - http://www.scopus.com/inward/record.url?scp=44349106947&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44349106947&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2007.4394612
DO - 10.1109/PIMRC.2007.4394612
M3 - Conference contribution
AN - SCOPUS:44349106947
SN - 1424411440
SN - 9781424411443
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
BT - 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
T2 - 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
Y2 - 3 September 2007 through 7 September 2007
ER -