In this paper, we study the potential of MultiCell Processing (MCP), via Base Stations (BSs) coordination, to improve the uniform capacity of a wireless network. MCP is particularly efficient for edge-cell users that experience very low SINR when an intensive spectral reuse is employed. We choose a baseline form of MCP to show that a simple Alamouti-like code can enhance the SINR by accounting ...

This paper proposes several algorithms to recover the transmitted signals in systems with multiple antennas that make use of orthogonal space time block code (O-STBC) to attain full transmit diversity. We interpret the scheme proposed by Alamouti in [1] and half-rate systems presented in [2] as classic blind source separation (BSS) problems where the received signals (observations) are instanta...

The effect of antenna mutual coupling on signal correlation and bit error rate (BER) of a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system has been modelled. A MIMOOFDM model with correlated channels is presented. The correlation matrices are determined with the antenna mutual coupling taken into account. The effect of antenna mutual coupling is chara...

Cooperative communications are gaining much interest in modern communications because they allow to improve the information transmission between a source and a destination using various intermediate terminals. This project is a complete study of cooperative systems, analyzing its performance and comparing the use of a single terminal with the use of the Alamouti code, which uses two terminals. ...

In this paper, a method is proposed to construct spectral-efficient unitary space-time codes for high-rate differential communications over multiple-antenna channels. Unlike most of the known methods which are designed to maximize the diversity product (the minimum determinant distance), our objective is to increase the spectral efficiency. The simulation results indicate that for high spectral...

The combination of space-time coding (STC) and continuous phase modulation (CPM) is an attractive field of research because both STC and CPM bring many advantages for wireless communications. Zhang and Fitz [1] were the first to apply this idea by constructing a trellis based scheme. But for these codes the decoding effort grows exponentially with the number of transmitting antennas. This was c...

This correspondence gives practical examples of space–time trellis codes performing as predicted by Root and Varaiya’s compound channel theorem. Specifically, 32-state and 64-state 2 2 space–time trellis codes are presented that provide a bit-error rate (BER) of10 on all2 2 matrix channels with an excess mutual information (MI) within 8% of the excess MI required by standard trellis codes of th...

We compare four open-loop transmit diversity schemes in a coded Orthogonal Frequency Division Multiplexing (OFDM) system with four transmit antennas, namely cyclic shift diversity (CSD), Space-Time Block Code (STBC, Alamouti code is used) with CSD, Quasi-Orthogonal STBC (QO-STBC) and Minimum-Decoding-Complexity QOSTBC (MDC-QOSTBC). We show that in a coded system with low code rate, a scheme wit...

The combination of space-time coding (STC) and continuous phase modulation (CPM) is an attractive field of research because both STC and CPM bring many advantages for wireless communications. Zhang and Fitz [1] were the first to apply this idea by constructing a trellis based scheme. But for these codes the decoding effort grows exponentially with the number of transmitting antennas. This was c...

In this paper we estimate the performance of 2*3 MIMO-MC-CDMA system using convolution code in MATLAB which highly reduces BER by increasing the efficiency of system. MIMO and MC-CDMA system combination is used to reduce bit error rate and also for forming a new system called MC-CDMA which is multi user and multiple access schemes used to increase the performance of the system. MC-CDMA system i...