MIMO/OFDM is one of the promising technologies to improve the spectral efficiency,
enhance system capacity and mitigate intersymbol interference in the fourth generation …

In this paper, a practical and efficient adaptive sub-carrier, power and bit allocation algorithm
for multi-user MIMO-OFDM systems is described. Assuming perfect knowledge of the …

We consider adaptive modulation in OFDM systems employing multiple transmitter and
receiver antennas. The goal is to determine the optimum choice of modulation constellations …

MIMO-OFDM is widely recognized today as a key combination of technologies to achieve
high spectral efficiency and high link reliability over space and frequency selective wireless …

As the demand of high quality service in next generation wireless communication systems, a
high performance of data transmission requires an increase of spectrum efficiency and an …

The use of space-division multiple access (SDMA) in the downlink of multiuser multi-
input/multi-output (MIMO) wireless transmission systems can provide substantial gains in …

The ability to provide high data rate is a key measure in 3GPP long term evolution (LTE).
Multiple input multiple output (MIMO) has emerged as an technique that increases the data …

In this paper, the combination of orthogonal frequency-division multiplexed (OFDM), multi-
input multi-output (MIMO) and adaptive modulation can effectively eliminate or resist various …

Future wireless communications systems need a high quality of service coupled with high
data rate transmission for multimedia services. Achieving this goal in the hostile wireless …

Adaptive MIMO-OFDM systems employing eigenmode based signalling have a great
potential to increase the spectral efficiency when the channel state information (CSI) is …