A Comparative Review on Handover and Co-Existence among Multiplexing Techniques for Future Generation Wireless Systems with Automatic Fall-back
Keywords:
Wireless Networks, Co-Existence, Non-Orthogonal Multiple Access (NOMA), Multi User Detection (MUD), Inter Symbol Interference (ISI), Frequency Selective Channel, Bit Error Rate (BER)Abstract
With increasing number of users and multimedia applications, bandwidth efficiency in cellular networks has become a critical aspect for system design. Bandwidth is a vital resource shared by wireless networks. Hence its in critical to enhance bandwidth efficiency. Orthogonal Frequency Division Multiplexing (OFDM) and Non-Orthogonal Multiple access (NOMA) have been the leading contenders for modern wireless networks. NOMA is a technique in which multiple users data is separated in the power domain. A typical cellular system generally has the capability of automatic fallback or handover. In such cases, there can be a switching from one of the technologies to another parallel or co-existing technology in case of changes in system parameters such as Bit Error Rate (BER) etc.Multi User Detection or MUD is a serious challenge faced in the field of wireless and cellular communications. Due to the high spectral efficiency, non-orthogonal multiple access (NOMA) based systems are becoming the latest choice for 5G networks and onwards. This paper presents a review on co-existence of NOMA and OFDM systems for future generation wireless networks.
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