專網(wǎng)協(xié)議頻段介紹

1、頻率結(jié)構(gòu)1 .子載波：子載波是LTE時(shí)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)暗，系統(tǒng)的基波頻率為15KHZo2 .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(guò)由于子載波數(shù)量太多，囹加帶寬下有1200個(gè)子載波，管理起來(lái)不方便。因此系統(tǒng)把12個(gè)連續(xù)的子載波組合在一起，時(shí)長(zhǎng)為一個(gè)時(shí)隙（），構(gòu)成資源映:resource block） o3.調(diào)度塊（SB）成。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1度鰥.位。一個(gè)調(diào)度塊由同一個(gè)子幀內(nèi)相同頻率范圍的兩就組4 .頻點(diǎn)：專門劃出的特定的頻率范圍，供指定無(wú)線設(shè)備來(lái)使用，用來(lái)避免本系統(tǒng)或者其他系統(tǒng)的無(wú)線設(shè)備帶來(lái)

2、的干擾。有兩個(gè)關(guān)鍵參數(shù)來(lái)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(hào)LTE頻點(diǎn)編號(hào)稱為EARFCN （E-UTRA Absolute Radio Frequency Channel Number）,利用頻點(diǎn)編號(hào)EARFCN可以得到頻點(diǎn)的另夕|、一個(gè)關(guān)鍵參數(shù)：中心 頻率 頻點(diǎn)的中心頻率從起始頻率開(kāi)始，以為步長(zhǎng)，隨著 EARFCN而遞增。在規(guī)范中，給出了 EARFCN與頻點(diǎn)中心頻率的對(duì)應(yīng)關(guān)系，單位MHZ。頻點(diǎn)中心頻率=(EARFCN-EARFCN) o *+起始頻率起始頻率、EARFCNo與頻點(diǎn)所處的頻段相關(guān)，這個(gè)兩個(gè)參數(shù)與

3、頻段的具體關(guān)系見(jiàn)表Table E-UTRA channel numbersLTE頻點(diǎn)計(jì)算公式下行頻點(diǎn)計(jì)算公式:FDL = FDL_low + (NDL - NOffs-DL)其中FDL為該載頻下行FDL_low對(duì)應(yīng)頻段的最低下行頻NDL為該載頻下行頻點(diǎn)號(hào)，NOffs-DL對(duì)應(yīng)頻段的最低下行頻點(diǎn)號(hào)。對(duì)應(yīng)關(guān)系表上行頻L"? jj、匕 rr-t 點(diǎn)計(jì)算公式：FUL = FUL_low + (NUL - NOffs-UL)其中FUL為該載頻上行頻點(diǎn)，F(xiàn)ULow對(duì)應(yīng)頻段的最低上行頻點(diǎn)，NUL為該載頻上行頻點(diǎn)號(hào)，NOffs-UL對(duì)應(yīng)頻段的最低上行頻點(diǎn)號(hào)。對(duì)應(yīng)關(guān)系表詳見(jiàn)起始頻率、EARFCNo與頻

4、點(diǎn)所處的頻段相關(guān)，這個(gè)兩個(gè)參數(shù)與頻段的具體關(guān)系見(jiàn)表Table E-UTRA channel numbers上下行頻點(diǎn)號(hào)范圍：0 - 65535.對(duì)應(yīng)關(guān)系表詳見(jiàn)表如下：E-UTRAOperatingBandDownlinkUplinkFdl_1ow MHzFdUIicMHzNof£s-DLRange of N dlF3 MHzFtl-HigMHzNo££s-ULRange of N ul1211000 一 599192018000180001859921930600600119918501860018600_191993180512001200 - 19491710

5、1920019200_19949421101950- 2399195017101995019950-2039958692400- 2649240082420400204002064968752650一 274926508302065020650-20749726202750- 3449275025002075020750-2144989253450一 379934508802145021450-21799938003800 - 41492180021800-221491021104150- 4749415017102215022150-227491147504750 4999227502275

6、0-229991272850005000 517969S2300023000-231791374651805180_52797772318023180_232791475852805280_53797882328023280_233791773457305730_58497042373023730_2384933190019203600036000- 36199190019203600036000_36199342010201536200- 36349 36200201020153620036200-36349351850191036350一 36949 3635018501910363503

7、6350-3694936193019903695036950- 37549193019903695036950_37549371910193037550一 37749 37550191019303755037550-37749382570262037750- 3824937750257026203775037750-38249391880192038250- 38649 38250188019203825038250-38649402300240038650一 3964938650230024003865038650-3964941249626903965039650- 41589249626

8、903965039650-4158942340036004159041590_ 43589340036004159041590-4358943360038004359043590_45589360038004359043590 - 45589447038034559045590_465897038034559045590 - 4658961143714676443664436-64735143714676443664436 一6473562178518056473664736-64935178518056473664736 -6493563180018306493664936-65235180

9、018306493664936 -6523564254525756523665236一65535254525756523665236 - 65535NOTE: The channel numbers that designate carrier frequencies so close to the operating band edges that the carrierextends beyondthe operating band 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 , 3, 5, 10, 15 and 20 MHz respectively.A1437M-1467M TDD 專網(wǎng)私有*/A1785M-1805M TDD 專網(wǎng)私有*/*1800M-1830M TDD 專網(wǎng)私有*/*TDD 私有