The major driver for broadband wireless communications has been reliable, high-data rate services. In
wireless communication, the multipath fading constitutes a bottleneck for increasing data rates and causes
performance degradation. To combat fading, we can use diversity. Wireless systems with multiple antennas at the
transmitter and receiver have much larger capacity in fading channels than standard wireless systems.
The objective of this thesis is to investigate the transmission scheme provided by matrix A and B in the
802.16 standard and show how it can be implemented.
The research focuses on using maximal-ratio combining (MRC) to demodulate the transmitted symbols.
Modifications to the existing matrix by using more frequency bands were introduced; this reduces the number of
transmitting antennas and uses fewer time slots to transmit the same number of symbols. The modulator and
demodulator design is also discussed. The performance of orthogonal and non-orthogonal space time codes (STC) are
evaluated.http://archive.org/details/implementationnd1094555198CivilianApproved for public release; distribution is unlimited
