專網(wǎng)協(xié)議頻段介紹(共6頁)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上頻率結(jié)構(gòu)1. 子載波：子載波是LTE時頻結(jié)構(gòu)中頻率的基本結(jié)構(gòu)單位，子載波的頻率是基波頻率的整數(shù)倍，LTE系統(tǒng)的基波頻率為15KHZ。2. 資源塊（RB）：子載波是LTE系統(tǒng)頻率的基本結(jié)構(gòu)單位，不過由于子載波數(shù)量太多，比如在20M帶寬下有1200個子載波，管理起來不方便。因此LTE系統(tǒng)把12個連續(xù)的子載波組合在一起，時長為一個時隙（0.5ms），構(gòu)成資源塊RB（resource block）。3. 調(diào)度塊（SB）：實(shí)際上，LTE系統(tǒng)為用戶分配的資源并不是以RB為單位，而是以調(diào)度塊SB為單位。一個調(diào)度塊由同一個子幀內(nèi)相同頻率范圍的兩個RB組成。4. 頻點(diǎn)：專門劃出的特定的

2、頻率范圍，供指定無線設(shè)備來使用，用來避免本系統(tǒng)或者其他系統(tǒng)的無線設(shè)備帶來的干擾。有兩個關(guān)鍵參數(shù)來描述：帶寬和中心頻率。帶寬就是子載波占用的頻率范圍，中心頻率就是頻點(diǎn)帶寬上最高頻率與最低頻率的平均值。5. 頻點(diǎn)編號LTE頻點(diǎn)編號稱為EARFCN（E-UTRA Absolute Radio Frequency Channel Number），利用頻點(diǎn)編號EARFCN可以得到頻點(diǎn)的另外一個關(guān)鍵參數(shù)：中心頻率頻點(diǎn)的中心頻率從起始頻率開始，以0.1MHZ為步長，隨著EARFCN而遞增。在規(guī)范TS36.101中，給出了EARFCN與頻點(diǎn)中心頻率的對應(yīng)關(guān)系，單位MHZ。頻點(diǎn)中心頻率=（EARFCN-EARF

3、CNo）*0.1+起始頻率起始頻率、EARFCNo與頻點(diǎn)所處的頻段相關(guān)，這個兩個參數(shù)與頻段的具體關(guān)系見表Table 5.7.3-1 E-UTRA channel numbers：LTE頻點(diǎn)計(jì)算公式 下行頻點(diǎn)計(jì)算公式： FDL = FDL_low + 0.1(NDL NOffs-DL) 其中FDL為該載頻下行頻點(diǎn)，F(xiàn)DL_low對應(yīng)頻段的最低下行頻點(diǎn)，NDL為該載頻下行頻點(diǎn)號，NOffs-DL對應(yīng)頻段的最低下行頻點(diǎn)號。對應(yīng)關(guān)系表詳見表5.7.3-1。 上行頻點(diǎn)計(jì)算公式： FUL = FUL_low + 0.1(NUL NOffs-UL) 其中FUL為該載頻上行頻點(diǎn)，F(xiàn)UL_low對應(yīng)頻段的最低上

4、行頻點(diǎn)，NUL為該載頻上行頻點(diǎn)號，NOffs-UL對應(yīng)頻段的最低上行頻點(diǎn)號。對應(yīng)關(guān)系表詳見表5.7.3-1。 上下行頻點(diǎn)號范圍： 0 - 65535. 對應(yīng)關(guān)系表詳見表5.7.3-1如下： E-UTRA Operating BandDownlinkUplinkFDL_low MHzFDL_Hig MHzNOffs-DLRange of NDLFUL_low MHzFUL_Hig MHzNOffs-ULRange of NUL1211000 59919201800018000 1859921930600600 - 119918501860018600 191993180512001200 194

5、917101920019200 199494211019501950 239917101995019950 20399586924002400 26498242040020400 20649687526502650 27498302065020650 207497262027502750 344925002075020750 21449892534503450 37998802145021450 2179991844.938003800 41491749.92180021800 2214910211041504150 474917102215022150 22749111475.9475047

6、50 49991427.92275022750 229991272850005000 51796982300023000 231791374651805180 52797772318023180 232791475852805280 53797882328023280 233791773457305730 58497042373023730 2384933190019203600036000 36199190019203600036000 3619934201020153620036200 36349201020153620036200 3634935185019103635036350 36

7、949185019103635036350 3694936193019903695036950 37549193019903695036950 3754937191019303755037550 37749191019303755037550 3774938257026203775037750 38249257026203775037750 3824939188019203825038250 38649188019203825038250 3864940230024003865038650 39649230024003865038650 3964941249626903965039650 41

8、589249626903965039650 41589 42340036004159041590 43589340036004159041590 4358943360038004359043590 45589360038004359043590 45589447038034559045590 465897038034559045590 46589.61143714676443664436 64735143714676443664436 64735/*1437M-1467M TDD專網(wǎng)私有*/62178518056473664736 64935178518056473664736 64935/*

9、1785M-1805M TDD專網(wǎng)私有*/63180018306493664936 65235180018306493664936 65235/*1800M-1830M TDD專網(wǎng)私有*/64254525756523665236 65535254525756523665236 65535/*TDD私有*/NOTE: The channel numbers that designate carrier frequencies so close to the operating band edges that the carrier extends beyond the operating ban

10、d edge shall not be used. This implies that the first 7, 15, 25, 50, 75 and 100 channel numbers at the lower operating band edge and the last 6, 14, 24, 49, 74 and 99 channel numbers at the upper operating band edge shall not be used for channel bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz respectively.注：頻段，