Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Frequency division duplex"”.
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Application of smart antennas to wideband code division multiple access : the uplink performance
… antenna arrays for the uplink of a Wideband Code Division Multiple Access (WCDMA) system in the Frequency Division Duplex (FDD) mode is addressed in this thesis. The beam-forming is implemented with a LS - DRMTA algorithm and a Lagrange multiplier based algorithm using the Q channel only. The …
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Co-channel interference rejection using a model-based demodulator
… (AMPS) and the narrowband version (NAMPS) use frequency modulation (FM) in a frequency division duplex mode. Because such systems typically use the same frequency bands in nearby cells, co-channel interference can be a significant problem. A typical digital implementation uses a quadrature …
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Channel Estimation in TDD and FDD-Based Massive MIMO Systems
… part, we study the channel estimation problem in frequency-selective multi-user (MU) multi-cell massive multiple-input multiple-output (MIMO) systems, where, a time-domain semi-blind channel estimation technique is proposed. Compared to frequency-domain, the time-domain channel estimation requires …
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Wide band TX Leakage Cancellation for FDD Transceivers
Frequency division duplex (FDD) is the most widely used full duplex technique for modern wireless communication systems. A device called a duplexer is needed in order to separate the transmitter (TX) and the receiver (RX) signals. To avoid RX being saturated and desensitized, the isolation between …
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Closed-loop multiple antenna aided wireless communications using limited feedback
… <br/><br/>This thesis is concentrated on a Frequency Division Duplex (FDD) cellular communication scenario using digitalized feedback information, where theMobile Terminals (MTs) estimate the Down-Link (DL) channel, quantise and feed back the required information to the Base Station (BS) …