Results 271 to 280 of about 49,554 (306)

Transmit diversity for TDD systems

SPIE Proceedings, 2002
Multiple input multiple output (MIMO) communications have been a hot research area in recent years. Most literature makes the assumption that the channel information is not known at the transmitter but known perfectly at the receiver. We focus on the situation where both the transmitter and the receiver know the channel information.
Jibing Wang, Kung Yao
openaire   +1 more source

Transmit diversity in mobile communications

14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562), 2003
This paper shows the transmit diversity (TD) techniques in applications for communication systems. General classification of the TD techniques for both TDMA and CDMA systems is presented. Some very promising TD techniques are characterized, i.e. code division TD (CDTD) and the time division TD (TDTD).
R. Katulski, M. Mikolajski
openaire   +1 more source

On transmit diversity with imperfect channel state information

IEEE International Conference on Acoustics Speech and Signal Processing, 2002
The optimal transmission strategy of a multiple-input single-output wireless communication link is studied in which the receiver has full channel state information and the transmitter has only long-term channel state information in terms of the channel covariance matrix.
Eduard A. Jorswieck, Holger Boche
openaire   +1 more source

A dCDD-Based Transmit Diversity for NOMA Systems

ICC 2020 - 2020 IEEE International Conference on Communications (ICC), 2020
In this paper, a new transmit diversity scheme for cooperative non-orthogonal multiple access (NOMA) is proposed without perfect channel state information at the transmitter (CSIT). To support two users under a near-far user pairing constraint, a distributed cyclic delay diversity (dCDD) scheme is adjusted into NOMA by dividing a set of remote radio ...
Kyeong Jin Kim, Hongwu Liu, Hongjiang Lei, Zhiguo Ding 0001, Philip V. Orlik, H. Vincent Poor   +5 more
openaire   +1 more source

Synchronization requirements for COFDM systems with transmit diversity

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
COFDM in combination with transmit and receive diversity is an attractive technique to increase robustness and throughput of wireless data transmission. In this paper we examine whether the sensitivity of COFDM to synchronization errors is further aggravated by these multiinput multioutput (MIMO) scenarios.
Michael Speth, Heinrich Meyr
openaire   +1 more source

Transmit Diversity for LTE PUCCH with Channel Selection

2011 IEEE Vehicular Technology Conference (VTC Fall), 2011
In this paper, a framework for designing transmit diversity schemes for LTE PUCCH format 1b with channel selection is introduced. The design criterion is to utilize the same number of orthogonal resources as in the single transmit antenna mode while exploiting the full diversity order.
Masoud Ebrahimi, R. Mark Harrison, Yongkang Jia   +2 more
openaire   +1 more source

Alamouti Transmit Diversity for Energy Efficient Femtocells

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
With the ever increasing demand for wireless broadband, design of energy efficient systems is paramount. Femtocells, small self installable wireless base stations, are currently being deployed as a solution to the coverage problems faced by mobile operators, particularly in indoor environments.
David Stuart Muirhead, Muhammad Ali Imran 0001   +1 more
openaire   +1 more source

Turbo processing in transmit antenna diversity systems

Annales Des Télécommunications, 2001
We consider turbo-trellis-coded transmission over fading multiple-input-multiple-output (M1M0) channels with transmit diversity using space-time block codes. We give a new view on space-time block codes as a transformation of the fading MIMO channel towards a Gaussian single-input-single-output (siso) channel and provide analytical results on the BER ...
Gerhard Bauch 0001, Joachim Hagenauer, Nambi Seshadri   +2 more
openaire   +1 more source

An adaptive technique for transmit antenna diversity with feedback

IEEE Transactions on Vehicular Technology, 2002
Transmit antenna diversity (TAD) has been employed for third-generation wireless systems. We propose an adaptive technique for TAD with feedback. It is shown that the proposed adaptive technique can efficiently increase the number of transmit antennas without significantly increasing the feedback bit rate under ideal conditions.
Jinho Choi 0001, Ho Kyu Choi, Hyeon Woo Lee   +2 more
openaire   +1 more source

A transmit diversity scheme for channels with intersymbol interference

2000 IEEE International Conference on Communications. ICC 2000. Global Convergence Through Communications. Conference Record, 2002
Alamouti (see Journal of Selective Communications, vol.16, no.8, p.1451-58, 1998) proposes a two branch transmit diversity scheme for channels without intersymbol interference. With two transmit antennas and one receive antenna the scheme provides second order diversity. In this paper we derive a new method which handles the corresponding case when the
Erik Lindskog, Arogyaswami Paulraj
openaire   +1 more source