Orthogonal frequency-division multiplexing (OFDM) is one of the most widely adopted
modulation schemes because it offers several desirable features, such as spectral efficiency …

The goal for the fourth generation (4G) of mobile communications system is to seamlessly
integrate a wide variety of communication services such as high speed data, video and …

As demand for high quality transmission increases increase of spectrum efficiency and an
improvement of error performance in wireless communication systems are important. One of …

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

Such as disaster rescue in deep water, undersea exploration and monitering for
environmental pollution, many applications require the acoustic communication for high data …

Security solutions using fiber-optic cable have not yet secured a solid technical stability,
through which the Acoustic detection security system also did not have a complete defense …

Bit Error Rate (BER) is decreased by evaluating the effectiveness of the novel
Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (ACO-OFDM) …

As underwater channel is very complex and time-varying, don't supports good-quality for
communication service. In this paper, a multi-carrier CDMA (MC-CDMA) system for the …

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 …

The need of any communication system is high data speed with higher accuracy and
reliability. Orthogonal Frequency Division Multiplexing (OFDM) provides optimistic solution …