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An Analysis of Uplink OFDMA Optimality
IEEE Transactions on Wireless Communications, 2006Motivated by the increasing popularity of OFDMA, this paper studies the sum-rate optimality of OFDMA as an uplink multicarrier multiple-access scheme. We address the relationship between OFDMA and the optimal multicarrier multiple- access schemes.
null Hongxiang Li, null Hui Liu
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Uplink capacity improvement through orthogonal code hopping in uplink-synchronized CDMA systems
IEEE Transactions on Wireless Communications, 2009We propose an orthogonal code hopping multiple access (OCHMA) scheme in order to improve the capacity of an uplink-synchronized code division multiple access (CDMA) systems. When orthogonal codes (OCs) are used for channelization in uplink-synchronized CDMA systems, a finite set of OCs tends to severely limit the capacity gain of the uplink ...
Jung, BC Jung, Bang Chul +2 more
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Adaptive uplink antenna testing
Proceedings of MILCOM '94, 2002Adaptive uplink antenna test issues are described. System level testing is required for adaptive designs rather than component level testing used by conventional antennas. Testing must be devised for development, qualification, and on-orbit phases. Instrumentation and test facilities must be developed to support adaptive design implementations. >
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2003
Uplink Access ControlIn a TDMA packet mobile communication system employing the concept of transport channels (405, 406, 407) in a medium access control layer (402), an uplink access control signal, for identifying a mobile station (6a, 6b) which is permitted to transmit, is inserted into each burst in a predetermined manner.
NOKIA CORP +2 more
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Uplink Access ControlIn a TDMA packet mobile communication system employing the concept of transport channels (405, 406, 407) in a medium access control layer (402), an uplink access control signal, for identifying a mobile station (6a, 6b) which is permitted to transmit, is inserted into each burst in a predetermined manner.
NOKIA CORP +2 more
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Semidefinite Relaxation Based Uplink Signal Reconstruction in Uplink Massive MIMO Systems
ICC 2020 - 2020 IEEE International Conference on Communications (ICC), 2020Guo Li, Xiao Zhang
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