Establishment of a research institute in nanjing , have more in the field of mobile communication technology with rich theoretical knowledge and practical experience of experts , professors , dr . specializing in the research and development of base station antennas and related products 當(dāng)人們走路的聲音,說話的聲音傳到燈頭上的聲控開關(guān)時(shí),電路就被自動(dòng)接通了。當(dāng)然,聲控開關(guān)旁邊還要有個(gè)延時(shí)開關(guān),就是使電路只能接通幾分鐘,然后再自然地?cái)嗟簟?
As for the base station antenna , the requirement of its volume , weight and cost is not as strict as that of the mobile terminal antenna . therefore , plenary use of the space of the base station to make the antenna satisfy various demands should be considered when designing the base station antenna 對(duì)于基站端的天線來說,其體積、重量、成本等不像移動(dòng)端天線那樣受到諸多限制,因此在設(shè)計(jì)基站天線時(shí)應(yīng)考慮充分利用基站天線的空間使天線滿足各方面的性能要求。
The smart antenna , which is adapted in the wireless mobile communication system , in fact , forms an antenna with a high gain . thus communication in all directions can be proceeded , then base station antenna coverage , system capacity and service quality are improved , also inter - symbol interferes and multi - access interfere are reduced . the space division multiple access ( sdma ) is introduced , and users can be distinct from each other through their special location 在無線移動(dòng)通信系統(tǒng)中采用智能天線技術(shù),實(shí)際上是通過數(shù)字信號(hào)處理,使天線陣為每個(gè)用戶自適應(yīng)地進(jìn)行波束賦形,相當(dāng)于為每個(gè)用戶形成了一個(gè)可跟蹤它的高增益天線,從而即可以進(jìn)行全方位通信,也可以用較小的發(fā)射功率覆蓋相同的范圍以及提高系統(tǒng)容量和業(yè)務(wù)質(zhì)量、降低用戶間的碼間干擾和多址干擾。