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Single-carrier frequency domain equalisation for microwave LOS-MIMO systems and its performance analysis

Single-carrier frequency domain equalisation for microwave LOS-MIMO systems and its performance analysis

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The authors analyse and investigate the effectiveness of frequency domain equalisation (FDE) for single-carrier (SC) transmission over a line-of-sight multiple-input multiple-output (LOS-MIMO) channel with frequency selective fading. For this purpose, they propose a LOS-MIMO system model employing SC-FDE techniques together with a data frame structure having a cyclic prefix and postfix (CPP) overhead. The channel capacity of the proposed system is derived taking into account system design parameters, such as symbol rate and roll-off factor, as well as multipath fading channel parameters. An efficient channel estimation method is also proposed for implementing and simulating the proposed system. Signature curves estimated in simulations are consistent with those expected from the theoretical capacity analysis. The simulation results show that the SC-FDE approach to the LOS-MIMO system can, with small CPP overhead, effectively reduce intersymbol and interstream interference.

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