In this paper we consider the application issue of the Alamouti coding scheme in filter bank based multicarrier (FBMC) systems. The presence of the inherent interference prevents the use of Alamouti coding scheme with FBMC modulation. Receiver schemes with interference cancellation are not always effective due to the error propagation. In this work, we propose some arrangements in the space-tim...

The impact of using wavelet based technique on the performance of a MC-CDMA wireless communication system has been investigated. The system under proposed study incorporates Walsh Hadamard codes to discriminate the message signal for individual user. A computer program written in Mathlab source code is developed and this simulation study is made with implementation of various antenna diversity ...

Since the publication of Alamouti’s famous space-time block code for two transmit antennas, various suboptimal space-time block codes for multi-input/multi-output fading channels have been proposed not achieving full diversity at full rate. In this paper we present a family of adaptive, channel dependent, rate-one Extended Alamouti spacetime block codes for four and eight transmit antennas. Onl...

We are going to implement and study a space frequency coded OFDM system which consists of two transmitters and a single receiver. Simple Alamouti spacetime code is used. An M-ary PSK modulation is used to modulate the symbols across an OFDM channel. We will also propose a variation of the scheme which tries to spread additional symbols across time-frequency attempting to increase the rate of tr...

We address the problems at the most critical area in a cellular multicarrier code division multiple access (MC-CDMA) network, namely, the cell border. At a mobile terminal the diversity can be increased by using transmit diversity techniques such as cyclic delay diversity (CDD) and space-time coding like Alamouti. We transfer these transmit diversity techniques to a cellular environment. Theref...

We investigate the performance of time-switched space-time transmit diversity schemes applied to a wireless communication system with multiple antennae at the transmitter and single antenna at the receiver. A new method of analysis of timeswitched transmit diversity schemes is presented which builds on an information theoretic equivalent channel and a generalized definition of diversity for cod...

The communication system under present study utilizing 1⁄2 rated convolutional encoding and interleaving schemes over an Additive White Gaussian Noise (AWGN) and other fading (Rayleigh and Rican) channels with deployment of Alamouti scheme. The simulation study is made with the development of a computer program written in MATLAB source code. Computer simulation results on BERs demonstrate that ...

The combination of space-time codes and a closed loop transmission diversity technique is currently receiving a lot of attention since it allows one to improve the performance of wireless communications channels. This paper proposes a simple closed loop transmission diversity technique to improve further the performance of the channels through proposing a structure of feedback information in or...

Within the framework of the Stingray Project, a Hiperman compatible MIMO system, three architectures with different rate-one Space-Time Codes (STC) are presented and their performance assessed. Viewing beam-forming and Alamouti as the two extreme cases of the trade-offs between performance/ complexity/feedback-requirements, an efficient scheme is proposed that reduces complexity and feedback re...

It is known that the Alamouti code is the only complex orthogonal design (COD) which achieves capacity and that too for the case of two transmit and one receive antenna only. Damen et al., gave a design for 2 transmit antennas, which achieves capacity for any number of receive antennas, calling it an information lossless STBC. In this paper, we construct capacity achieving designs using cyclic ...