共查询到17条相似文献,搜索用时 750 毫秒
1.
2.
3.
阐述无线宽带技术,对制约宽带网络接入能力的现状进行分析,介绍无线宽带技术在运营商接入组网中的应用。针对管线资源覆盖不足的农村和远郊地区,利用运营商无线基站的广覆盖能力,将无线宽带技术作为有线宽带技术的补充,解决最后一公里的覆盖和最后一百米的入户问题,有效拓展宽带网络,向广度和深度延伸。 相似文献
4.
5.
6.
随着移动通信建设步伐的不断加快、移动用户的飞速增加,在大中城市的室外地区已经基本可以做到无缝覆盖。为了提高网络质量、提高用户满意度、增加话务量,室内覆盖越来越成为网优的重点。本文主要论述了一种无线信号覆盖的接入系统,和现有的EOC设备相结合,利用CATV同轴电缆实现无线信号入楼或者入户的深度覆盖,提供了更好的室内移动通信环境。 相似文献
7.
“用一个宽带无线覆盖系统满足当今乃至未来可预见的各运营商对无线业务、容量和技术的要求,以及服务于整个楼宇用户的各种类型的无线应用需求。”从这样的设计理念出发,江森自控的覆盖方案首先考虑的是各种频率的信号在系统中的共存,即如何抑制各信号间的干扰,在克服干扰的前提下,使系统中并存的各信号辐射都尽可能小,从而实现整体辐射最小,保证绿色的室内无线环境。 相似文献
8.
9.
目前宽带不再仅是高科技,也是提升生活质量、提高劳动生产率的重要手段,成为如水、电、气一样的互联网时代基础设施.尤其是“宽带中国”战略的出台,推动我国接入网速率不断提升.
千兆示范小区比比皆是
随着4K视频、VR/AR等新业务的兴起,十兆、百兆接入已无法满足用户对带宽的需求,千兆接入不断普及.
千兆入户也已成为运营商特色业务之一,Ovum统计数据显示,目前在全球已有超过100家运营商启动千兆宽带战略.我国三大运营商也争相发展千兆入户示范小区,部分发达省份已经开始推出千兆用户套餐. 相似文献
10.
11.
针对室内漫射光无线通信问题,提出一种采用离散多音/正交幅度调制和空时块编码的多输入多输出(MIMO)光无线通信技术.基于离散多音/正交幅度调制技术,并通过考虑室内全光无线信道的脉冲响应和其噪声特性,建立起室内红外光无线链路的信道模型;再采用空时块编码技术,提出一种实现室内漫射光无线通信的MIMO无线通信系统,并通过分析... 相似文献
12.
RoF技术分析及其应用 总被引:3,自引:0,他引:3
介绍并分析了光纤承载射频(RoF)中的一些关键技术的解决方案,包括基于光纤光栅的单边带调制技术、自适应数字预失真系统和基于波长交叉的波分复用技术.此外,还介绍了RoF技术在4G无线接入网、路途车辆通信系统和室内信号覆盖系统中的应用和发展趋势. 相似文献
13.
14.
15.
16.
Shu-ping Yeh Talwar S. Seong-choon Lee Heechang Kim 《Communications Magazine, IEEE》2008,46(10):58-65
Femtocells are viewed as a promising option for mobile operators to improve coverage and provide high-data-rate services in a cost-effective manner. The idea is to overlay low-power and low-cost base station devices, Femto-APs, on the existing cellular network, where each Femto-AP provides high-speed wireless connection to subscribers within a small range. In particular, Femto-APs can be used to serve indoor users, resulting in a powerful solution for ubiquitous indoor and outdoor coverage, using a single access technology such as WiMAX. In this article we consider a WiMAX network deploying both macro BSs and Femto-APs, where it is assumed that Femto-APs have wired backhaul such as cable or DSL and operate on the same frequency band as macro BSs. Simulation results show that significant areal capacity (throughput per unit area) gain can be achieved via intense spatial reuse of the wireless spectrum. In addition, Femto-APs improve indoor coverage, where the macro BS signal may be weak. Motivated by the gains in capacity and coverage offered by femtocells, we review the state of the art of this "infant" technology, including use cases and network deployment scenarios, technical challenges that need to be addressed, and current standardization and industry activity. 相似文献
17.
In order to provide more flexible and convenient service for users in the hybrid transmission network,a novel system using a single optical modulator to provide wired and single side band (SSB) wireless signal was proposed.By combining the application of dual-polarization binary phase shift keying modulator (DP-BPSK),phase shifter and other devices,wired and SSB wireless signals were directly generated to suppress the walk-off effect caused by dispersion,and the effective transmission of 5 Gbit/s SSB wireless signal carried on 40 GHz millimeter wave and 10 Gbit/s wired signal over 65 km single-mode fiber (SMF) were successfully achieved.The experiments show that the application of polarization multiplexing technology and optical subcarrier multiplexing technology can make the signal have a greater improvement in transmission rate and performance,and play an important role in the future broadband communication network. 相似文献