通信畢業(yè)設(shè)計文獻翻譯-資料下載頁
2025-05-11 15:26本頁面
【導(dǎo)讀】d表示接收機與基站間的距離；HTx為發(fā)射機高度；HRx為接收機高度；區(qū)域有較良好的無線網(wǎng)絡(luò)覆蓋。因此蜂窩基站小區(qū)覆蓋邊界處的接收電平為。功率51dBm來推算理論覆蓋范圍。天線下傾等因素的綜合修正因子。針對一個地區(qū)具體的。網(wǎng)絡(luò)a和Ki為相對固定的值。補充GSM900M的單蜂窩扇區(qū)的載頻數(shù)，從而實現(xiàn)容量上的增加。要求合理設(shè)計覆蓋，使得同一扇區(qū)區(qū)內(nèi)的不同載頻有相同的覆蓋；入到支持BCCH頻段的載頻上；過參數(shù)設(shè)置實現(xiàn)；過業(yè)務(wù)層的設(shè)定允許非BCCH頻段上的數(shù)據(jù)業(yè)務(wù)應(yīng)用；同一個扇區(qū)內(nèi)工作，可以自然地實現(xiàn)雙頻話務(wù)均衡，提升了網(wǎng)絡(luò)資源的利用率；載頻，應(yīng)對網(wǎng)絡(luò)容量的增長需求。7/7/6，DCS1800M的頻點數(shù)為9/7/5。開啟COMMONBCCH后該蜂窩小區(qū)的接通率、掉話率和切換成功率。使用COMMONBCCH技術(shù)的GSM蜂窩基站維持了較好的無線通話質(zhì)量。對于室內(nèi)通話情況，因為DCS1800信號的穿透損耗大，就變得更為明顯。
【正文】 to address growing demand for work capacity. In a GSM cellular base station ,the attempt to use the COMMON BCCH technology add DCS1800M frequency in GSM900M cellular district, and upgrade the original base station configuration from 7/7/6 to 16/14/11,when points to the frequency of GSM900M is 7/7/6, 9/7/5 for DCS1800M frequency points. Through the use of COMMON BCCH Technology, the number of the carrier frequency of GSM cellular base stations can be significantly expanded,and base station capacity has been improved. After opening COMMON BCCH, the Cellular39。s switch rate, drop call rate and indicators of the success rate of switching have no change, the indicator level of receiver increasing, while the difference in voice quality indicators did not change significantly, so the use of COMMON BCCH technology makes GSM cellular base station to maintain good wireless call quality. But COMMON BCCH39。s open has strict requirements on the same frequency coverage of dual area. because good frequency accounting for the weaker TCH channel may cause switch and decline of TCH allocation success the situation calls for indoor situation, because the DCS1800 signals through loss is large, it bees more evident.
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