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This paper proposes a performance enhancement scheme using a coordinated multi-point (CoMP) with spatial phase coding (SPC) based on multiple-input-multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) in a heterogeneous network (HetNet) system. In the conventional system, the performance of the mobile terminal (MT) is degraded due to the inter-cell interference (ICI). When the MT is located on the cell edge, the performance and quality of service (QoS) of the MT are attenuated due to the interference caused by the signal transmitted from the adjacent base station (BS) or the signal broadcasted by other MTs. In order to increase the reliability of the MT, the proposed scheme uses a pre-coding and the CoMP scheme in HetNet. The proposed scheme can increase the signal-to-noise ratio (SNR) of the MT through the SPC scheme in the transmitter. Therefore, the proposed scheme can mitigate the performance degradation caused by the ICI and can enhance the reliability of the MT. The simulation results show that the proposed scheme has better bit error rate (BER) performance and has higher throughput than the conventional scheme. Therefore, the proposed scheme enhances the performance of the MT by using SPC with CoMP.

Spatial Phase Coding With CoMP for Performance Enhancement Based on MIMO-OFDM in HetNet System