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
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Journal ArticleDOI
Resource Allocation Based on Channel Sensing and Spatial Spectrum Reuse for Cognitive Femtocells
TL;DR: Although data traffic load of the macrocell increases, the capacity of the cognitive femtocell can be maintained appropriately by the proposed resource allocation and power control scheme and it is shown that the performance is improved compared to that of the conventional scheme.
Proceedings ArticleDOI
Zero-forcing hybrid precoding based on QR-decomposition in millimeter wave systems
Gu Sichen,Xu Liu,Chen Xinkai +2 more
TL;DR: Numerical results show that the performance of the proposed zero-forcing hybrid precoding method is close to that of the full digital ZF precoding algorithm with less RF chains used in mmWave systems.
Proceedings ArticleDOI
The performance of SC-FDMA systems with rotated constellation in the presence of phase noise and channel estimation error
TL;DR: It is shown that rotated constellation is robust and its advantages over its non-rotated counterpart are retained in the presence of phase noise and channel estimation error and for high coding rate, the SC-FDMA system using rotated constellation may potentially outperform the coded OFDM system under the same impairments.
Book ChapterDOI
Nigeria: Cyber Space Security Vis a Vis Computerisation, Miniaturisation and Location-Based Authentication
Muhammad I. Adeka,M.J. Ngala,M. S. Bin-Melha,E. Ibrahim,Simon J. Shepherd,Issa Elfergani,Abubakar Sadiq Hussaini,F. Elmegri,Raed A. Abd-Alhameed +8 more
TL;DR: It was discovered that both computerisation and miniaturisation had some negative effects on cyber-security, as these were being exploited by fraudsters, especially using ‘advance fee fraud;’ popularly called 419.
LTE-A Multi-hop Network with Zero Link Overflow Utilizing OTFWC Scheduling
TL;DR: Simulation results show effective improvement in uplink network performance using the proposed scheduling scheme and 2x4MIMO-AMC with RS at 50% of cell radius towards cell edge and Adaptive Modulation, and Coding (AMC) scheme with high order 2x 4MIMo is used to maximize network throughput with low bit error rate.
References
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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
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Proceedings ArticleDOI
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