GPS-aided opportunistic Space-Division Multiple Access for 5G communications

Mobile network is moving in the era of 5G (fifth generation) communications as a research and development from 3G and 4G. Due to the growth of new applications available on network development, the demand for access to the internet increases enormously which makes the data rate grow beyond expectation. This is an important reason to accelerate the development of more progressive 5G technology to allocate radio frequencies which is limited for demand. Among candidate for 5G technology, Opportunistic SpaceDivision Multiple Access (OSDMA) is one of the most promising techniques that can be implemented in practice. This technique provides a high data rate for multiple users and requires less feedback information than conventional SDMA. However, the feedback requirement is still a big drawback for this technique. Although Angle-of-Departure-Aided OSDMA (AOD-OSDMA) technique is proposed to reduce the feedback information, unfortunately the high throughput relies on the feedback bit channel state information (CSI) for each user at the transmitter. System has limited a full CSI by large feedback overhead and affect by performance degradation due to channel estimation errors. This paper proposes a novel OSDMA technique called as Global-Positioning-System-Aided OSDMA (GPS-OSDMA). The knowledge of location estimation for each user is updated at base station (BS) via GPS technology. The simulation results show that the proposed technique overcomes the AOD-OSDMA for all scenarios.