化工廠人員定位是(shi)一種無(wu)載(zai)波通信(xin)技術,它使用納秒到微秒的非正弦(xian)窄(zhai)脈沖(chong)(chong)(chong)(chong)來(lai)傳輸數據(ju)。采用脈沖(chong)(chong)(chong)(chong)寬度為(wei)ns級的快速上(shang)升和(he)下降脈沖(chong)(chong)(chong)(chong),脈沖(chong)(chong)(chong)(chong)覆(fu)蓋的頻譜(pu)為(wei)DC至(zhi)GHz,無(wu)需常規窄(zhai)帶調(diao)制所(suo)需的射頻頻率轉換,脈沖(chong)(chong)(chong)(chong)整形后(hou)可直接發(fa)送到天(tian)線傳輸。頻譜(pu)形狀可以通過非常窄(zhai)的持續(xu)單(dan)脈沖(chong)(chong)(chong)(chong)形狀和(he)天(tian)線負載(zai)特性(xing)來(lai)調(diao)整。
化工廠人員定位的一般功能和安裝位置要如何進行選擇?
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