Journal ArticleDOI
LTE-advanced: next-generation wireless broadband technology [Invited Paper]
TLDR
An overview of the techniques being considered for LTE Release 10 (aka LTEAdvanced) is discussed, which includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, and heterogeneous networks with emphasis on Type 1 and Type 2 relays.Abstract:
LTE Release 8 is one of the primary broadband technologies based on OFDM, which is currently being commercialized. LTE Release 8, which is mainly deployed in a macro/microcell layout, provides improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operation and seamless integration with existing systems. LTE-Advanced (also known as LTE Release 10) significantly enhances the existing LTE Release 8 and supports much higher peak rates, higher throughput and coverage, and lower latencies, resulting in a better user experience. Additionally, LTE Release 10 will support heterogeneous deployments where low-power nodes comprising picocells, femtocells, relays, remote radio heads, and so on are placed in a macrocell layout. The LTE-Advanced features enable one to meet or exceed IMT-Advanced requirements. It may also be noted that LTE Release 9 provides some minor enhancement to LTE Release 8 with respect to the air interface, and includes features like dual-layer beamforming and time-difference- of-arrival-based location techniques. In this article an overview of the techniques being considered for LTE Release 10 (aka LTEAdvanced) is discussed. This includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, uplink spatial multiplexing including extension to four-layer MIMO, and heterogeneous networks with emphasis on Type 1 and Type 2 relays. Finally, the performance of LTEAdvanced using IMT-A scenarios is presented and compared against IMT-A targets for full buffer and bursty traffic model.read more
Citations
More filters
Proceedings ArticleDOI
Design of high performance RF transceiver for next generation wireless communications
TL;DR: The design of a high performance RF transceiver which supports wireless data-rate up to 1Gb/s is presented and has a 60dB dynamic gain control range both in the TX and RX link.
Proceedings ArticleDOI
Subcarrier allocation and relay selection for uplink transmission in OFDMA-based cognitive radio systems
TL;DR: The simulation results show that the performance of MIB scheme is better than that of LQB scheme when the constraint for received interference power from SUs at primary receiver is dominant.
Proceedings ArticleDOI
On fairness in LTE downlink MAC scheduling algorithms
Ismael Al-Shiab,Rana Ejaz Ahmed +1 more
TL;DR: The results of a comparative simulation study with respect to a fairness criterion for three well-known downlink schedulers are presented.
Proceedings ArticleDOI
An adaptive resource allocation scheme for device-to-device communication underlaying cellular networks
Foad Hajiaghajani,Mehdi Rasti +1 more
TL;DR: This paper formally state the uplink resource allocation problem of maximizing system sum-rate while taking the signal-to-interference-plus-noise ratio (SINR) constraints into account for each user, and proposes a centralized scheme in which both CUEs and DUEs make probabilistic resource sharing decisions by taking advantage of a concept namely, Adaptive Interference Restricted Region (AIRR).
Proceedings ArticleDOI
Simulation and performance analysis of physical downlink shared channel in long term evolution (LTE) cellular networks
TL;DR: A work flow model of the LTE Downlink System is proposed in order to analyze the performance of the downlink communication and simulate this model to evaluate the key parameters like signal-to-noise ratio (SNR) and bit error rate (BER).
References
More filters
Proceedings ArticleDOI
Overview of UMTS Air-Interface Evolution
Brian K. Classon,Kevin L. Baum,Vijay Nangia,R. Love,Yakun Sun,R. Nory,K. Stewart,Arunabha Ghosh,Rapeepat Ratasuk,Weimin Xiao,Jun Tan +10 more
TL;DR: A preliminary look at the air interface for Evolved UTRA (E-UTRA) and associated key technologies required to reach its design objectives are provided.
Proceedings ArticleDOI
On UMTS-LTE Physical Uplink Shared and Control Channels
TL;DR: The proposed channel estimation technique is shown to have significant gains in performance compared to other well known channel estimation techniques such as the maximum-likelihood (ML) and the inverse fast Fourier transform (IFFT) channel estimation methods.