Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Introduction to Trellis-Coded Modulation with Applications
Introduction to Trellis-Coded Modulation with Applications
Modern Communications and Spread Spectrum
Modern Communications and Spread Spectrum
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
A space-time coding modem for high-data-rate wireless communications
IEEE Journal on Selected Areas in Communications
On the Multi-Resolution Techniques for LTE-Advanced
Wireless Personal Communications: An International Journal
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In this paper transmitter antenna diversity for the downlink of a cellular system is proposed in conjunction with optimum anti-fading diversity. In spectrally efficienttransmitter antenna, frequency and time diversity schemes the information bit stream is divided into sub-streams and each sub-stream is transmitted over a different antenna, a different frequency, or a different time slot.The present work provides a fading resistant transmission scheme where a base station uses M1 antennas and M2 time slotsM=M1+M2. These transmissions are coordinated tomitigate the effects of multi-path Rayleigh fading and the mobilereceiver can recover the entire M-dimensional transmitted vector as longas the signal energy of at least one coordinate is large enough. TheSelective Transmitter Antenna Diversity (space diversity) scheme iscoordinated with new Orthonormal Complex Rotation Matrices(time diversity) to get the highest BER performance for low and medium signaltonoise ratio. Orthonormal Complex Rotation Matrices with variable and maximum peak toaverage amplitude ratio (PAR) are presented. The modulations considered in this workareQPSK, 8PSK and 16QAM.