Towards the performance evaluation of 4^thgeneration wireless communication standards: LTE versus Mobile WiMAX

Abstract

Advances in wireless communication protocols and networking toward support of the next generation of mobile and radio broadband technologies have contributed to a strong competition among various telecommunication standards in particular Long Term Evolution (LTE) and Mobile Worldwide Interoperability for Microwave Access (WiMAX). In this paper, we provide an in-depth comparison analysis of LTE and Mobile WiMAX at the physical (PHY) layer by studying the most similar PHY configuration scenarios for these two technologies. Our study includes a throughput analysis of downlink (DL) and uplink (UL) transmissions in time division duplex with the least overhead possible and different antenna schemes as well as modulation and code rates. This study also performs an overhead analysis in both protocols to provide a more in-depth understanding of the PHY layer capacity in various PHY layer configurations. Our simulation results generally show higher performance for LTE in both DL and UL transmission with 7 Mbps in DL and 5 Mbps in UL, when using one antenna port. However, by increasing the number of antennas for multiple-input/multiple-output configurations, the results illustrate a reduction in the performance of LTE compared to Mobile WiMAX. This arises from the increase in reference signal overhead in LTE from 4.7% in single-input/single-output (SISO) to 14.28% in 4 4 multiple-input/multiple-output (MIMO).

Performance analysis of SFBC‐OFDM system with channel estimation error over generalized fading channels

“…As a special case, when the fading paths are assumed to be both independent and identically distributed, (19) can be further simplified to form the exact expression of ABER for SFBC-OFDM system as…”

“…[1][2][3] A lot of work has been done on the performance analysis of SFBC-OFDM system over different fading channels. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] In the year 2002, Lu et al 2 proposed a low-density parity-check code-based space-time code OFDM system for correlated fading channels in which performance analysis was given in terms of outage probability and OFDM word error rate. The frame error rate and outage probability of binary phase-shift keying (BPSK) and quadrature phase-shift keying (QPSK) modulated space-time block code (STBC)-based and SFBC-based OFDM system was reported by El Gamal et al 3 The performance analysis of space-time coding was done in the work of Garg et al 4 with imperfect channel estimation in 2005.…”