Differential modulated pilot symbol assisted adaptive OFDM for reducing the MLI

CJ Ahn, S Takahashi, H Harada - 2004 IEEE Region 10 …, 2004 - ieeexplore.ieee.org
In an AMS/OFDM system, base station is in control of the modulation level of each
subcarriers and then, adaptive modulated packet is transmitted from the base station to the …

Differential modulated pilot symbol assisted adaptive OFDM for reducing the MLI with predicted FBI

CJ Ahn, S Takahashi, H Harada - IEICE transactions on …, 2005 - search.ieice.org
In an AMS/OFDM system, base station is in control of the modulation level of each
subcarriers, and then, adaptive modulated packet is transmitted from the base station to the …

Efficient techniques in OFDM system with channel evaluation

SY Yeo, JS Yoon, MS Baek, YH You… - IEICE transactions on …, 2006 - search.ieice.org
In this letter, we aim at the study of an OFDM system that employs adaptive modulation
techniques to achieve efficient transmission service. In adaptive modulation techniques, a …

Bit and subcarrier allocation for OFDM transmission using adaptive modulation

HS Chu, CK An - 7th Korea-Russia International Symposium on …, 2003 - ieeexplore.ieee.org
OFDM is one of the promising modulation candidates for a fourth generation broadband
mobile communication system because of its robustness against intersymbol interference …

A Study on the Modulation Technique for Adaptive OFDM System in Broadband Mobile Channel

A Chong-Koo, C Hyung-Suk - Journal of the Institute of …, 2005 - koreascience.kr
OFDM is one of the promising modulation candidates for a fourth generation broadband
mobile communication system because of its robustness against inter-symbol inteference …

The effects of modulation combination, target BER, Doppler frequency, and adaptation interval on the performance of adaptive OFDM in broadband mobile channel

CJ Ahn, I Sasase - IEEE Transactions on Consumer Electronics, 2002 - ieeexplore.ieee.org
OFDM is one of the promising modulation candidates for a fourth generation broadband
mobile communication system because of its robustness against intersymbol interference …

Adaptive subcarrier block modulation with differentially modulated pilot symbol assistance for downlink OFDM using uplink delay spread

CJ Ahn, S Takahashi, H Harada, Y Kamio… - IEICE transactions on …, 2005 - search.ieice.org
In AMS/OFDM systems, base station is in control of the modulation level of each subcarrier,
and then, adaptive modulated packet is transmitted from the base station to the mobile …

Adaptive OFDM with channel predictor over frequency-selective and rapid fading channel

TJ Hwang, HS Hwang, HK Balik - 14th IEEE Proceedings on …, 2003 - ieeexplore.ieee.org
In this paper, we present an adaptive modulation technique for orthogonal frequency
division multiplexing (OFDM) and enhance the performance of adaptive OFDM using a …

Performance evaluation of adaptive OFDM systems in time-varying channels

H Zhang, D Yuan, C Song, X Gao - … International Conference on …, 2004 - ieeexplore.ieee.org
One of advantages of the OFDM transmission technique is that it has the inherent flexibility
to adapt the modulation scheme on each subcarrier according to the signal-to-noise ratio …

Sub-band spreading technique for adaptive modulation in OFDM systems

BC Jung, JK Kwon, H Jin… - Journal of Communications …, 2008 - ieeexplore.ieee.org
We propose a sub-band spreading technique for adaptive modulation (AM) in orthogonal
frequency division multiplexing (OFDM) systems in order to reduce signaling overheads and …