Phase-Inversion Symmetric Method-Cooperative MIMO Transmission Mechanism for Clustered Ad Hoc Networks

摘要

Since wireless links are relatively weak, bandwidth is relatively limited and there is no support for fixed infrastructures, clustered Ad Hoc networks are easy to be disturbed by channel noises. Therefore, clustered Ad Hoc networks have poor channel transmission performance and are unable to enter the large-scale practical application stage in a short period of time. To improve the channel transmission performance of clustered Ad Hoc Networks and the practical value of the cooperative multi-input multi-output (MIMO) technology, a cooperative MIMO transmission mechanism based on phase-inversion symmetric method (PISM-CMIMO) is proposed, which absorbs the advantages of phase-inversion symmetric method and cooperative MIMO technology and makes full use of the correlation of the adjacent channel noises. This paper presents the transmission process of PISM-CMIMO system in detail. Through theoretical analysis and system simulation, it shows that the signal-to-noise ratio (SNR) gain of the proposed PISM-CMIMO transmission mechanism is 9 times greater than the traditional cooperative MIMO transmission mechanism. In addition, the proposed PISM-CMIMO transmission mechanism has larger link capacity, less bit-error rate (BER) and can reduce the distance between the cooperative MIMO mobile terminal antennas, which enhance its practical value greatly.