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In this study, the problem of joint angle and delay estimation for underwater acoustic multicarrier CDMA systems using a vector sensor is addressed. By jointly utilising the temporal, pressure and velocity information inherent in the received signal, the temporal-vector-sensor manifold vector is constructed. Then, a MUSIC-based algorithm that contains several one-dimensional searches for jointly estimating...
For radio access systems based on time division duplex (TDD) mode, like the time division synchronous code multiple access (TD-SCDMA) radio system, frame synchronization is a fundamental feature to minimize interference and therefore optimize the offered traffic capacity. In particular, sub-frame synchronization ensures that uplink and downlink transmission directions are positioned. In this paper...
Generalized RAKE (G-RAKE) and linear minimum mean square error (LMMSE) are two equalization techniques designed for advanced receivers in wideband code division multiple access (WCDMA) / high-speed downlink packet access (HSDPA) systems. In this paper, we first review the theoretical properties and discuss some implementation issues of the G-RAKE technique. The equivalence between G-RAKE and LMMSE...
In this paper a linear multi-user beamforming technique is proposed for frequency-selective channels in multiple-input-multiple-output (MIMO) wideband code division multiple access (WCDMA) system. Assuming perfect Channel State Information (CSI) is available at both transmitter and receiver, transmit beamforming and receive beamforming are coordinated to mitigate multi-user, multiple access (MAI),...
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