Improved resource allocation in LTE-A relay networks using ACLR

Abstract

Future wireless networks will face the dual challenge of supporting large traffic volumes while providing reliable service for delay-sensitive traffic. To meet the challenge, relay network has been introduced as a new network architecture for the fourth generation (4G) LTE-Advanced (LTE-A) networks. In this paper, we investigate resource allocation including subcarrier and power allocation for LTE-A relay networks under statistical quality of service (QoS) constraints. By dual decomposition, we derive the optimal subcarrier and power allocation strategies to maximize the effective capacity (EC) of the underlying LTE-A relay systems. Characteristics of optimal resource allocation strategies are identified, and a low-complexity suboptimal scheme is developed through optimizing the subcarrier and power allocation individually.  In this paper proposed in Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation (FBMC/OQAM) is recognized as an appropriate modulation scheme for 5G wireless technologies.as per the extremely low Adjacent Channel Leakage Ratio (ACLR), FBMC/OQAM scheme is a suitable candidate for cognitive radio (CR) applications. Like all multicarrier systems, FBMC/OQAM suffers from the high Peak to Average Power Ratio (PAPR).