Dynamic Time-Frequency Division Duplex

Coexistence of two time division duplex

60 GHz Wireless Link Using Frequency Division Duplex QPSK Architecture

This report presents the process of designing a 1 Gbps wireless data link system with an isotropic antenna. The data link specification requires a Bit Error Rate (BER) of less than 1× 10−6 without any error correction coding. A high frequency is required to provide a large bandwidth for this high data rate. Since the Federal Communications Commission (FCC) allocates 57–64 GHz for unlicensed ope...

Urban and suburban frequency division duplex measurements for UMTS

Wideband measurements across the two frequency bands allocated for UMTS serivesc have been carried out in the dense urban environment of Manchester city centre and in the suburbas of Manchester. The data were anaylsed to characterise the differences between both the two 60 MHz bands and for corresponding 5-MHz bands. Reults of the individual bands and for the differences are presented from the ...

Uplink-Based Downlink Beamforming in Frequency Division Duplex Systems

................................................................................................... 2 Acknowledgments .................................................................................... 3 Table of

Subspace Transmission for Frequency-Division Duplex Mobile Wireless Systems

A novel approach to the adaptive transmission to combat fast fading effect in mobile wireless systems is presented. In this approach, the downlink beamforming weights of the base station antennas are generated based on the orthogonal basis of the uplink signal subspace. The signal intended for a particular mobile user is transmitted through its corresponding signal subspace. Due to the stabilit...