A space-time coding modem for high-data-rate wireless communications

Antenna systems for broadband wireless access

“…Space-time coding is another approach that has received significant attention recently [6,16,19] in MIMO systems. This is because such a scheme can significantly improve the data rate and communication reliability over fading channels.…”

“…codes is the high decoding complexity, which grows exponentially as a function of both the required capacity and the diversity order [16]. Thus, space time codes with low decoding complexity while retaining acceptable performance are quite desirable.…”

“…The proposed wireless metropolitan area network (Wireless MAN) standard IEEE 802. 16, which is aimed at wireless broadband access is also considering the use of antenna systems for performance improvement.…”

Time Synchronization Issues for Quasi-Orthogonal Space-Time Block Codes

“…results and discussion regarding the influence of the timing The optimum sample selection algorithm presented in [1] offset on the performance of the system are presented in was the first work to address the problem of data-aided feed-Section IV, examining various cases of space-time designs, forward symbol timing estimation in multi-antenna systems. number of receive antennas and values of the roll-off factor However, the algorithm requires extra transmission of training Of the combined transmit-receive pulse shaping filter.…”

“…The pulsei=1 n=1 shaped signal si (t) = Xi(t) * PT (t) transmitted from the ith where it can easily be shown [1] that the noise samples nj (in)…”