Abstract
The main objective of a Cooperative Multiple-Input Multiple-Output (CMIMO) system is to improve network throughput and network coverage and save energy. By grouping wireless devices as virtual multi-antenna nodes, it can thus simulate the functions of multi-antenna systems. A Space-Time Block Code (STBC) was proposed to utilize the spatial diversity of MIMO systems to improve the diversity gain and coding gain. In this paper, we proposed a cooperative strategy based on STBC and CMIMO, which is referred to as Space-Time Block Coded Cooperative Multiple-Input Multiple-Output (STBC-CMIMO) to inherit the advantages from both STBC and CMIMO. The theoretical performance analysis for the proposed STBC-CMIMO is presented. The performance advantages of the STBC-CMIMO are also shown by simulations. In the simulations, it is demonstrated that STBC-CMIMO can obtain significant performance compared with the existing CMIMO system.
Highlights
The Multiple-Input Multiple-Output (MIMO) system has been a key technology for modern wireless systems in recent years
We provide the theoretical performance of the proposed STBCCMIMO system
The upper bound on the Average Pairwise Error Probability (APEP) of the Maximum Likelihood (ML) detection for the proposed SpaceTime Block Code (STBC)-Cooperative Multiple-Input Multiple-Output (CMIMO) system at D can be expressed as PDDF (X → X) ≤ PR (X) PD (X → X| R : X ) + ∑ PR (X → X) PD (X → X R : X ), (8)
Summary
The Multiple-Input Multiple-Output (MIMO) system has been a key technology for modern wireless systems in recent years. Not like SM, GSM uses multiple activated transmit antennas during transmission. In MA-SM, different information symbols are transmitted by the different activated transmit antennas during one time slot, which can further increase the transmission rate of the system. Space time code (STC) technology takes into account the coding scheme of the wireless channel, the size of spatial diversity gain, the complexity of detection and demodulation algorithm and other factors that affect the system performance, and integrates them through related technologies. Several wireless communication systems based on STBC and SM techniques have been studied for CMIMO in [22,23,24,25,26,27,28]. A novel MIMO communication system is proposed, which is referred to as STBC-CMIMO. A novel wireless communication system, called the STBC-CMIMO system, is proposed.
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