Alamouti’s space-time coding scheme for Multi-Input Multi-Output (MIMO) system has drawn much attention in 4G wireless technologies. Orthogonal frequency division multiplexing (OFDM) is a popular method for high data rate wireless transmission. OFDM may be combined with antenna arrays at the transmitter and receiver to increase the diversity gain and enhance the system capacity on time variant ...

In this paper, we propose the new technique adopting power control to MIMO(multi-input multi-output)OFDM(orthogonal frequency division multiplexing) system with multi-beamformer. Through the proposed technique, we can iteratively control the transmitting power and update the weight of beamformer simultaneously. Therefore, the beam is formed toward the desired direction and the SNIR at each subc...

Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation scheme that provides efficient bandwidth utilization and robustness against time dispersive channels. This paper deals with the basic system model for OFDM based systems and with self-interference, or the corruption of desired signal by itself in OFDM systems. A simple transceiver based on OFDM modulation is present...

Studies on Performance of Pulse Shaped OFDM Signal Written by Administrator Wednesday, 16 March 2011 08:55 Last Updated Monday, 21 March 2011 07:29 The Orthogonal Frequency Division Multiplexing (OFDM) transmission system is one of the optimum versions of the multi-carrier transmission scheme. The OFDM is referred in the literature as Multi-carrier, Multi-tone and Fourier Transform based modula...

Studies on Performance of Pulse Shaped OFDM Signal Written by Administrator Wednesday, 16 March 2011 08:55 Last Updated Monday, 21 March 2011 07:29 The Orthogonal Frequency Division Multiplexing (OFDM) transmission system is one of the optimum versions of the multi-carrier transmission scheme. The OFDM is referred in the literature as Multi-carrier, Multi-tone and Fourier Transform based modula...

Studies on Performance of Pulse Shaped OFDM Signal Written by Administrator Wednesday, 16 March 2011 08:55 Last Updated Monday, 21 March 2011 07:29 The Orthogonal Frequency Division Multiplexing (OFDM) transmission system is one of the optimum versions of the multi-carrier transmission scheme. The OFDM is referred in the literature as Multi-carrier, Multi-tone and Fourier Transform based modula...

Single antenna vector OFDM (V-OFDM) system has been proposed and investigated in the past. It contains the conventional OFDM and the single carrier frequency domain equalizer (SC-FDE) as two special cases and is flexible to choose any number of symbols in intersymbol interference (ISI) by choosing a proper vector size. In this paper, we develop cyclic delay diversity (CDD) transmission for V-OF...

The orthogonal frequency division multiplexing is used in wireless communication due to high data rate. OFDM are robustness against multi-path fading, frequency selective fading, and narrow band interference. Wavelet analysis has strong advantages over fourier transform and also allows time-frequency domain operation with flexibility. Wavelet is applied in various fields of wireless communicati...

Multiple-input multiple-output orthogonal frequency division multiplexing with index modulation (MIMO-OFDM-IM) has recently received increased attention, due to the potential advantage balance trade-off between spectral efficiency (SE) and energy (EE). In this paper, we investigate application of MIMO-OFDM-IM millimeter wave (mmWave) communication systems, where a hybrid analogy-digital (HAD) b...