An Introduction to Spread-Spectrum Communications
An Introduction to Spread-Spectrum Communications
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Principles of Spread-Spectrum Communication Systems
Principles of Spread-Spectrum Communication Systems
Use of multiple antennas for DS/CDMA code acquisition
IEEE Transactions on Wireless Communications
Acquisition for DS/CDMA systems with multiple antennas in frequency-selective fading channels
IEEE Transactions on Wireless Communications
MIMO Capon Receiver and Channel Estimation for Space-Time Coded CDMA Systems
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
On the theory of space-time codes for PSK modulation
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
From theory to practice: an overview of MIMO space-time coded wireless systems
IEEE Journal on Selected Areas in Communications
Space-time block coding for single-carrier block transmission DS-CDMA downlink
IEEE Journal on Selected Areas in Communications
Wireless Personal Communications: An International Journal
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This paper proposes a new MIMO based CDMA code acquisition scheme. The pilot codes consist of a number of short Gold code sequences which are transmitted in parallel using a group of transmit antennas. Reception diversity is performed by multiple receive antennas at the receiver. Three different acquisition detection techniques are proposed and compared. Corresponding threshold optimizations are investigated as well. Detection and false alarm probabilities are derived in closed form based on the outputs of non-coherent matched filters. The acquisition performance is evaluated in terms of mean acquisition time (MAT) in Rayleigh fading environment. It is shown that the proposed MIMO acquisition scheme exhibits a much better MAT performance than the conventional single-antenna acquisition scheme. The results reveal that multiple receive antennas can be utilized to significantly reduce the MAT at the expense of receiver complexity increase. On the other hand, increasing the number of transmit antennas makes the MAT performance more robust in the presence of strong interference.