在无线网络毫米波频谱的利用

遇到在无线和光学通信网络的最终用户的带宽需求的增加连续，毫米波（MMW）载波用于未来的宽带无线网络。在下一代无线网络中，通常开发并基于在MMW频率带中的可用频谱的利用率（30-300千兆赫）实现以提供多千兆位网络，在大的距离的高可靠的传输。从该引线到限制性覆盖范围和迁移率的信道衰落的MMW无线通信受到影响。为了设计基于毫米波频谱的无线网络，这些网络的性能，必须进行优化，以提供了巨大的数据传输速率，低延迟和高频谱效率。

几乎所用的最近5G无线网络是从28 GHz到80GHz的毫米波中的频带扩展从30GHz到300GHz的子带。广泛的传播测量已在28千兆赫，38千兆赫和73 GHz的城市微孔，城市宏蜂窝和/或室内场景被执行。通过使用MMW频率提供高性能容量，吞吐量和与在当前网络，如长期评估（LTE）无线网络（2 GHz或3.6千兆赫）施加微波频率相比的QoS 5G无线网络的规划。该开发技术也使MMW可能便宜的消费电子设备，如全双工（FD），大规模的多输入多输出（MIMO），正交频分多址（OFDMA）和广义频分复用（GFDM）。

当频率上升到MMW的范围内，能量吸收引起的气氛，雨和雪变得日益突出这导致信号的传输距离的限制。在这个特殊的问题，大部分入选论文的出版提出了解决这些问题。

The first paper “Spectral and Energy Efficiencies in mmWave Cellular Networks for Optimal Utilization" by A. M. Hamed and R. K. Rao is proposed to examine energy efficiency (EE), spectral efficiency (SE), network latency, area spectral efficiency (ASE), and area energy efficiency (AEE) of MMW cellular network in 28 and 73 GHz bands for line-of-sight (LOS) and non-line-of-sight (NLOS) links. This paper presented a frame work for analysis of SE and EE metrics of the network for optimum utilization of network resources. The results have shown that 73 GHz band achieves better SE and the 28 GHz band is superior in terms of EE. It is observed that while the latter band is expedient for indoor networks, the former band is appropriate for outdoor networks.

The second paper “Measurement Method of Temporal Attenuation by Human Body in Off-the-Shelf 60 GHz WLAN with HMM-Based Transmission State Estimation" by Y. Koda et al. conducted a measurement of time-varying signal attenuation induced by human blockage, involving a commercially available IEEE 802.11ad wireless local area network access point (WLAN AP) and wireless station (STA). This paper has estimated signal coexisting at each sampling point using a simple two-state hidden Markov model. The measurements have been validated in that the measured time-varying signal attenuation is in agreement with knife edge diffraction theory.

The third paper “Indoor Corridor Wideband Radio Propagation Measurements and Channel Models for 5G Millimeter Wave Wireless Communications at 19 GHz, 28 GHz, and 38 GHz Bands" by A. M. Al-samman et al. has investigated the propagation characteristics at three different bands 19, 28, and 38 GHz in an indoor corridor environment for LOS and NLOS scenarios. The results have shown that the received signal power at the higher frequency band is more sensitive to the angle-of-arrival (AOA) variation. It is shown that, within a 1-m receiver movement, the received signal power decreases by up to 11 dB when using the 38 GHz band and the signal only decreased approximately 3 dB for the 19 GHz band.

The fourth paper “Combined Sector and Channel Hopping Schemes for Efficient Rendezvous in Directional Antenna Cognitive Radio Networks" by A. M. Al-Mqdashi et al. has proposed efficient schemes for achieving sector and channel rendezvous in directional antenna cognitive radio networks (DIR-CRNs). Rendezvous is a prerequisite and important process for secondary users (SUs) to establish data communications in CRNs. Two efficient coprimality-based sector hopping schemes have been proposed for providing sector rendezvous in asymmetric and symmetric role environments. The sector hopping (SH) schemes have been combined with an efficient grid-quorum-based channel hopping (CH) scheme for providing a guaranteed sector and channel rendezvous simultaneously between the SUs in DIR-CRNs.

The fifth paper “A Stochastic Geometry Approach to Full-Duplex MIMO Relay Network" by M. N. Hindia et al. has developed a tractable model to analyze the success probability and ergodic capacity of the two-hop MIMO expressions for the random nodes, using tools from stochastic geometry. The results have shown the effect of partial zero forcing (PZF) in mitigating the interferences including the self-interference to demonstrate the feasibility of FD technology even for moderate values of self-interference attenuation.

Redhwan Q. Shaddad
艾哈迈德·M.铝SAMMAN
穆拉德A.拉萨姆

无线通信和移动计算

在无线网络毫米波频谱的利用

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