Results 141 to 150 of about 14,989 (194)

BER-Allocation in MIMO and MIMO-OFDM

2006 IEEE International Symposium on Information Theory, 2006
Adaptive bit loading algorithms are proposed for MIMO and MIMO-OFDM systems, thus better exploiting space and frequency diversity. Constant power allocation is assumed over all subchannels while the bit error rate is unconstrained. An efficient bit loading algorithm, which maximizes system bit rate under target mean BER restriction is formulated for a ...
Erez Wineberger, Ofer Amrani
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Downlink MIMO in LTE-advanced: SU-MIMO vs. MU-MIMO

IEEE Communications Magazine, 2012
Single-user multi-antenna technologies are well upported in current standard specifications like LTE Release 8/9. Further development of the specification (LTE-Advanced) is expected to conform to the requirements for IMT-Advanced systems. One of the key enabling features of LTE-Advanced to meet IMT-Advanced downlink performance requirements is multi ...
Lingjia Liu 0001, Runhua Chen, Stefan Geirhofer, Krishna Sayana, Zhihua Shi, Yongxing Zhou   +5 more
openaire   +1 more source

Full dimension mimo (FD-MIMO): the next evolution of MIMO in LTE systems

IEEE Wireless Communications, 2014
Full dimension MIMO has attracted significant attention in the wireless industry and academia in the past few years as a candidate technology for the next generation evolution toward beyond fourth generation and fifth generation cellular systems. FD-MIMO utilizes a large number of antennas placed in a 2D antenna array panel for realizing spatially ...
Younsun Kim, Hyoungju Ji, Juho Lee 0002, Young-Han Nam, Boon Loong Ng, Ioannis Tzanidis, Yang Li 0024, Jianzhong Zhang 0002   +7 more
openaire   +1 more source

X-MIMO

Proceedings of the 18th Conference on Embedded Networked Sensor Systems, 2020
Multi-user MIMO (MU-MIMO) is a widely-known, fundamental technique to significantly improve the spectrum efficiency. While there is a great demand for spectrum efficiency and massive scalability under explosively increasing IoT, hardware limitations make it particularly challenging for the mechanism to be transferred to the IoT (e.g., ZigBee) domain ...
Shuai Wang 0021, Woojae Jeong, Jinhwan Jung, Song Min Kim   +3 more
openaire   +1 more source

To MIMO or Not To MIMO in Mobile Satellite Broadcasting Systems

IEEE Transactions on Wireless Communications, 2011
This letter studies the potential capacity advantages of introducing a dual polarization per beam paradigm instead of the conventional single polarization per beam in mobile satellite broadcasting systems. This enables the application of MIMO techniques, not yet thoroughly investigated for mobile satellite systems.
Pantelis-Daniel M. Arapoglou, Paolo Burzigotti, Massimo Bertinelli, Ana Bolea Alamañac, Riccardo De Gaudenzi   +4 more
openaire   +1 more source

MIMO in HSDPA and Legacy-MIMO Co-Existence

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010
Multiple Input Multiple Output (MIMO) transmission improves downlink spectral efficiency and is a key feature of Release 7 High Speed Downlink Packet Access (HSDPA). When the Node-B is configured in the MIMO mode with secondary common control pilot channel (S-CPICH), the power amplifiers (PAs) for the two transmit antennas are not balanced.
Pavan K. Vitthaladevuni, Haitong Sun, Danlu Zhang, Sharad Sambhwani, Jilei Hou   +4 more
openaire   +1 more source

Multipath signal effect on the capacity of MIMO, MIMO-OFDM and spread MIMO-OFDM

15th International Conference on Microwaves, Radar and Wireless Communications (IEEE Cat. No.04EX824), 2004
MIMO (Multiple-Input Multiple-Output), MIMO-OFDM (MIMO Orthogonal Frequency Division Multiplexing) and spread MIMO-OFDM systems are considered as candidates for future broadband wireless services. In order to compare their performances, the effects of multipath signal propagation on the capacity, under both single and multi user channel, are examined ...
Uthansakul, P., Bialkowski, M. E.
openaire   +2 more sources

MIMO systems

2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012
The presence of fading in radio communications is the major impairment to reach the promised capacity. Diversity is a way to limit the fading effects and MIMO is a technique to exploit it. It is shown that in terrestrial mobile radio communications MIMO is an effective techniques while for satellite systems it requires further study to exploit possible
openaire   +2 more sources

MIMO compute-and-forward

2009 IEEE International Symposium on Information Theory, 2009
In many network communication scenarios, a relay in the network may only need to recover and retransmit an equation of the transmitted messages. In previous work, it has been shown that if each transmitter employs the same lattice code, the interference structure of the channel can be exploited to recover an equation much more efficiently than possible
Zhan, Jiening, Nazer, Bobak, Gastpar, Michael, Erez, Uri   +3 more
openaire   +1 more source

Switching between MIMO‐TDMA and MIMO‐CDMA

Transactions on Emerging Telecommunications Technologies, 2012
AbstractThe throughput analyses for MIMO‐TDMA (multiple‐input multiple‐output with time division multiple access) and MIMO‐CDMA (multiple‐input multiple‐output with code division multiple access) are performed. These analyses show that there is a crossover in the throughput for MIMO‐TDMA and MIMO‐CDMA.
openaire   +1 more source