Abstract
This paper proposes an adaptive coordinated multi point (CoMP) scheme using pre-coding in order to improve the reliability of wireless communication systems based on orthogonal frequency division multiplexing (OFDM). In the conventional scheme, the received signal to noise ratio (SNR) of the mobile is degraded due to the interference signal. Therefore, the bit error rate (BER) performance is degraded, as is, the reliability of the system, due to inter-cell interference (ICI). Therefore, the BER performance of the system is reduced and the transmitter must perform unnecessary re-transmission. The proposed scheme uses the CoMP scheme to improve reliability in a heterogeneous network (HetNet) system. Additionally, the proposed scheme uses the constructive spatial phase coding (SPC) scheme to mitigate the received SNR reduction due to the interference signal. Therefore, the proposed scheme can prevent performance degradation caused by the interference signal. When a mobile is located in the cell edge, the transmission signal is distorted by the transmitted signal from the adjacent cell. The proposed scheme can reduce the SNR of the interference signal by using the destructive SPC scheme. Therefore, this scheme can improve the reliability of the system. The simulation results show that the BER performance of the proposed scheme is better than that of the conventional scheme. As a result, the proposed scheme improves the reliability of systems by adaptively applying the CoMP and SPC schemes.
Highlights
Nowadays, wireless communication systems require a high spectral efficiency and high reliability.The orthogonal frequency division multiplexing (OFDM) technique was developed, because it is one of the schemes which use frequency efficiently within a limited bandwidth [1,2,3]
In order to solve complicated inter-cell interference (ICI) scenarios, this paper proposes a coordinated multi point (CoMP) scheme in which the base station cooperates adaptively according to the location of the mobile
The proposed CoMP scheme is compared to the conventional scheme
Summary
Wireless communication systems require a high spectral efficiency and high reliability. In the second scenario, because the interference signal is transmitted by the base station in the adjacent cell, the interference signal has high power It greatly affects the performance of the HetNet system. This paper proposes a scheme to mitigate the interference signal transmitted from the base station among the interference scenarios of the HetNet system. In order to solve complicated ICI scenarios, this paper proposes a CoMP scheme in which the base station cooperates adaptively according to the location of the mobile. In the proposed CoMP scheme, the mobile transmits feedback information (including the position, channel state information (CSI), etc.) to all base stations in adjacent cells. This paper proposes an interference mitigation scheme by performing only pre-coding without using the relay.
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