基于MMDS电视微波的无线接入系统

Wireless access systems based on MMDS

无线接入是有线接入的重要补充和应急备份,尤其对于通信比较落后的乡村或人口分散地区有着重要的意义,可以克服地形复杂、地广人稀、铺设有线电缆的方式不经济的缺点.以解决偏远地区分散用户的网络需求为目标,根据安徽地区的实际需求及合作企业提出的实际问题,以淮北地区"村村通"工程建设为例,与淮北市广电传输中心暨安广网络公司淮北分公司合作,基于当地数字电视微波频段进行宽带无线接入技术的研究.研究设计了基于MMDS(microwave multipoint distribution systems)微波电视网络的宽带无线接入系统,以实现数字电视微波的双向传输拓展,提高频谱资源的利用率,实现绿色通信.

Wireless access is an important supplement and backup for public wire access telecommunications networks,especially for countryside and scattered users in remote areas.To satisfy the needs of countryside users and the practical demand of Anhui Province,a wireless access system was designed based on the microwave multipoint distribution systems（MMDS） used for local microwave television networks.This work was conducted in cooperation with the broadcast and television transmission center of Huaibei city.The local frequency of microwave television was used for our wireless access,and the unilateral television transmission was extended to bidirectional transmission.The utilization efficiency of spectrum resources was improved.The design is conducive to the realization of green wireless technology and systems in future.