Scalable cyclic prefix based adaptive roll-off factor for phase offset reduction in LTE

Abstract

This paper introduces Raised Cosine Filter (RCF) based Adaptive Cyclic Prefix (ACP) method with fixed Roll-off factor that efficiently reduces phase offset of a conventional BWA system. RCFACP delivers a fair Quality of Service (QoS) to the end users within a given BWA network without compromising with either Raw Data Rate (RDR) or Spectral Efficiency. Further reduction in phase offset has been achieved by modifying the RCF, having Adaptive Roll-off Factor (ARF). A detailed design process followed by extensive mathematical derivations establishes ACPARF algorithm within a standard BWA Transceiver (TxRx). The simulation results reveal that ACPARF registers an impressive 63% better error correction in contrast to RCFACP. Additionally, ACPARF also minimizes ISI to significant proportions, under severely poor channel condition. Results also confirm that ACPARF works far better than that of the existing ACP algorithm by delivering a 80% enhanced error rectification for higher order modulation for generic BWA network.