ÎÊÌâÒÑ¿ªÆô
(ÆÕͨÎÊÌâ)
CDMA¶þÔØƵ
ÌáÎÊÕß: shuoxingtingxia ÌáÎÊʱ¼ä: 2010-05-06
• ´óÀаïæдһϽâÎö£¬Ð»Ð»¡£¡£Radio 2468 2T2RÔÚG+L»ìÄ£Çé¿öÏÂÖ§³ÖÒÔÏÂÄļ¸ÖÖÔØƵÅäÖ㨠£© 2020-03-09
• СÇøÔØƵPUDCHʵ¼ÊʹÓÃPRB¸öÊýΪºÎÒª³ý2 2019-01-28
• ÔØƵÊÇʲô£¿ 2018-04-24
• 900MÊÇÔØƵÂð 2018-04-24
• »ªÎªCDMAÔØƵ¸ººÉ¾ùºâ²ÎÊý 2018-02-11
• MCPA»ùÕ¾Á½¸öÉÈÇø¸ÉÈÅ£¬²âÊÔÔØƵRX½ÓÊÕ¹¦Âʹý´ó 2017-11-15
• MRFUÔØƵ°åµÄ°²×°³ß´ç 2017-08-31
• Ò»¸öСÇøÅäÖÃÒ»¸ö1X£¬Ò»¸öDOÔØƵ£¬¸ÃСÇøµÄRRUÄÜ·ñ¿ªµ½Âú¹¦ÂÊ£¨60W»ò80W£© 2017-04-20
• СÇøÔØƵPUDCHʵ¼ÊʹÓÃPRB¸öÊýΪºÎÒª³ý2 2019-01-28
• ÔØƵÊÇʲô£¿ 2018-04-24
• 900MÊÇÔØƵÂð 2018-04-24
• »ªÎªCDMAÔØƵ¸ººÉ¾ùºâ²ÎÊý 2018-02-11
• MCPA»ùÕ¾Á½¸öÉÈÇø¸ÉÈÅ£¬²âÊÔÔØƵRX½ÓÊÕ¹¦Âʹý´ó 2017-11-15
• MRFUÔØƵ°åµÄ°²×°³ß´ç 2017-08-31
• Ò»¸öСÇøÅäÖÃÒ»¸ö1X£¬Ò»¸öDOÔØƵ£¬¸ÃСÇøµÄRRUÄÜ·ñ¿ªµ½Âú¹¦ÂÊ£¨60W»ò80W£© 2017-04-20
ÎÊÌâ´ð°¸
( 6 )
»Ø´ðÕߣº
robert2006
»Ø´ðʱ¼ä£º2010-05-06 10:46
3 3
| |
°Ù±¦»ã 2012-06-21 09:37
CDMAÕ¼ÓõÄÔØƵÉÏÐУ¨825MHz-835MHz£©ÏÂÐУ¨870MHz-880MHz£©
ÔØƵ¼ÆË㣺
ÉÏÐУºÔØƵ=0.030MHz*ÔØƵºÅ+825.000MHz
ÏÂÐУºÔØƵ=0.030MHz*ÔØƵºÅ+870.000MHz
×Ü7¶ÔƵµã
µ«ÊÇ£¬CDMAϵͳÊÇ»ùÓÚÂë·Ö¼¼Êõ£¨À©Æµ¼¼Êõ£©ºÍ¶àÖ·¼¼ÊõµÄͨÐÅϵͳ£¬ÏµÍ³ÎªÃ¿¸öÓû§·ÖÅä¸÷×ÔÌض¨µØÖ·Âë¡£µØÖ·ÂëÖ®¼ä¾ßÓÐÏ໥׼Õý½»ÐÔ£¬´Ó¶øÔÚʱ¼ä¡¢¿Õ¼äºÍƵÂÊÉ϶¼¿ÉÒÔÖصþ£»½«Ðè´«Ë͵ľßÓÐÒ»¶¨ÐźŴø¿íµÄÐÅÏ¢Êý¾Ý£¬ÓÃÒ»¸ö´ø¿íÔ¶´óÓÚÐźŴø¿íµÄαËæ»úÂë½øÐе÷ÖÆ£¬Ê¹ÔÓеÄÊý¾ÝÐźŵĴø¿í±»À©Õ¹£¬½ÓÊն˽øÐÐÏò·´µÄ¹ý³Ì£¬½øÐнÓÀ©£¬ÔöÇ¿ÁË¿¹¸ÉÈŵÄÄÜÁ¦¡£CDMAÍøÂçÖУ¬ÊÖ»úͨ¹ýPNÂëÀ´±ç±ð²»Í¬ÉÈÇø¡£Í¬Ò»ÉÈÇøµÄ²»Í¬µÄÂß¼ÐŵÀͨ¹ýWalshÂëÀ´Çø·Ö¡£
CDMAÊÇÀ©ÆµÍ¨ÐŵÄÒ»ÖÖ£¬Ëû¾ßÓÐÀ©ÆµÍ¨ÐŵÄÒÔÏÂÌص㣺
£¨1£©¿¹¸ÉÈÅÄÜÁ¦Ç¿¡£ÕâÊÇÀ©ÆµÍ¨ÐŵĻù±¾Ìص㣬ÊÇËùÓÐͨÐÅ·½Ê½ÎÞ·¨±ÈÄâµÄ¡£
£¨2£©¿í´ø´«Ê䣬¿¹Ë¥ÂäÄÜÁ¦Ç¿¡£
£¨3£©ÓÉÓÚ²ÉÓÿí´ø´«Ê䣬ÔÚÐŵÀÖд«ÊäµÄÓÐÓÃÐźŵŦÂʱȸÉÈÅÐźŵŦÂʵ͵ö࣬Òò´ËÐźźÃÏóÒþ±ÎÔÚÔëÉùÖУ»¼´¹¦ÂÊ»°ÃܶȱȽϵͣ¬ÓÐÀûÓÚÐźÅÒþ±Î¡£
£¨4£©ÀûÓÃÀ©ÆµÂëµÄÏà¹ØÐÔÀ´»ñÈ¡Óû§µÄÐÅÏ¢£¬¿¹½Ø»ñµÄÄÜÁ¦Ç¿¡£
ÀûÓÃÈÅÂë¼¼Êõ£¬¾Í¿ÉÒÔÃÖ²¹ÆµµãÉٵIJ»×㣡
CDMAͨÐÅ£¬ÈÅÂëµÄ×÷ÓãºÒª·ÖÉÏÐкÍÏÂÐÐÁ´Â·À´¿¼ÂÇ£º
ÈÅÂë¾ÍÊǾÍÊÇÓÃÒ»¸öαËæ»úÂëÐòÁжÔÀ©ÆµÂë½øÐÐÏà³Ë£¬¶ÔÐźŽøÐмÓÃÜ¡£
ÉÏÐÐÁ´Â·ÎïÀíÐŵÀ¼ÓÈŵÄ×÷ÓÃÊÇÇø·ÖÓû§£¬ÏÂÐÐÁ´Â·¼ÓÈÅ¿ÉÒÔÇø·ÖСÇøºÍÐŵÀ¡£
ÔÚÉÏÐÐÁ´Â·ÖУ¬ÈÅÂëÇø·ÖÓû§£¬À©ÆµÂ루Ҳ½ÐÐŵÀ»¯Â룩Çø·Öͬһ¸öÓû§µÄ²»Í¬ÐŵÀ£¨ÎïÀíÊý¾Ý£¨DPDCH£©ºÍ
¿ØÖÆÐŵÀ£¨DPCCH£©£©;ÏÂÐÐÁ´Â·ÖУ¬ÈÅÂë¿ÉÒÔÓÃÀ´Çø·Ö²»Í¬µÄСÇø£¬ÓÃÀ©ÆµÂëÇø·ÖͬһСÇøÖв»Í¬µÄÓû§¡£WCDMA ÖоÍÊÇÀûÓÃÀ©ÆµÂëºÍÈÅÂëÀ´¼õÉÙ¶àÓû§Ö®¼ä¸ÉÈÅ¡£
¸ÉÈÅËæ»ú»¯
Æäʵ£¬CDMAÖÐʹÓÃÈÅÂë×îÖ÷ÒªµÄÄ¿µÄÊǸÉÈÅËæ»ú»¯¡£ÀýÈ磺ÔÚÇ°Ïò£¬Ê¹ÓÃÁËÁ¼ºÃµÄÈÅÂëºó£¬ÆäËûСÇøÀ´µÄÐźſÉÒÔ½üËÆ¿´×÷ÊǸß˹ÔëÉù¡£ÎÒÃÇÖªµÀ¸ß˹ÔëÉùÊÇ×îºÃµÄÔëÉù¡£ÖÁÓÚ¼ÓÃܵÈÆäËû¹¦ÄÜÄǶ¼ÊÇ´ÎÒªµÄ¡£
ÔÚWCDMAÖУ¬ÏÂÐÐÓÐÖ÷ÈÅÂëºÍ¸¨ÈÅÂë¡£¸¨ÈÅÂëÓÃÀ´À©Õ¹ÐŵÀÂëµÄ¿Õ¼ä¡£È·±£ÏµÍ³ÊǸÉÈÅÊÜÏ޵Ķø²»ÊÇÂëÊÜÏ޵ġ£ÔÚÉÏÐУ¬ÒòΪWCDMA²»ÊÇͬ²½ÏµÍ³£¬ËùÒÔÿ¸öÓû§Ê¹ÓöÀÁ¢µÄOVSFÂë¿Õ¼ä¡£Òò´ËÓÃÈÅÂëÀ´½øÐÐÓû§¼äµÄ¸ôÀë¡£ÔÀíÒ»Ñù£¬Ò²ÊǸÉÈÅËæ»ú»¯¡£
Èç¹ûÈÅÂëÌ«¶Ì»òÉè¼Æ²»ºÃ£¬¾ÍÆð²»µ½¸ÉÈÅËæ»ú»¯µÄ×÷ÓᣵäÐ͵ÄÀý×ÓÊÇTD-SCDMA,ÓõÄÊÇ16bitµÄÈÅÂ롣Ч¹ûºÜ²î£¬´ó´óÓ°ÏìÁËTD-SCDMAµÄϵͳÐÔÄÜ¡£¿ÉÄÜÊÇTD-SCDMAÔçÆÚµÄÉè¼ÆÕ߶ÔÈÅÂëµÄÈÏʶÓоÖÏÞÐÔ¡£ÁíÍ⣬ÒòΪÖÇÄÜÌìÏßµÄʹÓã¬Óû§ÃæµÄÐÅÔë±È±È½Ï¸ß¡£µ«ÊÇÒòΪÂë×ÊÔ´ÊÜÏÞ£¨TD-SCDMAûÓÐʹÓø¨ÈÅÂëÇÒÀ©ÆµÒò×Ó×î´óÊÇ16£©£¬TD-SCDMAÓû§ÃæµÄÄÜÁ¦Ã»Óгä·Ö·¢»Ó¡£
ÔØƵ¼ÆË㣺
ÉÏÐУºÔØƵ=0.030MHz*ÔØƵºÅ+825.000MHz
ÏÂÐУºÔØƵ=0.030MHz*ÔØƵºÅ+870.000MHz
ÔØƵºÅ | ÐŵÀºÅ | ÉÏÐУ¨MHz£© | ÏÂÐУ¨MHz£© |
7 | 283 | 833.49 | 878.49 |
6 | 242 | 832.26 | 877.26 |
5 | 201 | 831.03 | 876.03 |
4 | 160 | 829.8 | 874.8 |
3 | 119 | 828.57 | 873.57 |
2 | 78 | 827.34 | 872.34 |
1 | 37 | 826.11 | 871.1 |
×Ü7¶ÔƵµã
µ«ÊÇ£¬CDMAϵͳÊÇ»ùÓÚÂë·Ö¼¼Êõ£¨À©Æµ¼¼Êõ£©ºÍ¶àÖ·¼¼ÊõµÄͨÐÅϵͳ£¬ÏµÍ³ÎªÃ¿¸öÓû§·ÖÅä¸÷×ÔÌض¨µØÖ·Âë¡£µØÖ·ÂëÖ®¼ä¾ßÓÐÏ໥׼Õý½»ÐÔ£¬´Ó¶øÔÚʱ¼ä¡¢¿Õ¼äºÍƵÂÊÉ϶¼¿ÉÒÔÖصþ£»½«Ðè´«Ë͵ľßÓÐÒ»¶¨ÐźŴø¿íµÄÐÅÏ¢Êý¾Ý£¬ÓÃÒ»¸ö´ø¿íÔ¶´óÓÚÐźŴø¿íµÄαËæ»úÂë½øÐе÷ÖÆ£¬Ê¹ÔÓеÄÊý¾ÝÐźŵĴø¿í±»À©Õ¹£¬½ÓÊն˽øÐÐÏò·´µÄ¹ý³Ì£¬½øÐнÓÀ©£¬ÔöÇ¿ÁË¿¹¸ÉÈŵÄÄÜÁ¦¡£CDMAÍøÂçÖУ¬ÊÖ»úͨ¹ýPNÂëÀ´±ç±ð²»Í¬ÉÈÇø¡£Í¬Ò»ÉÈÇøµÄ²»Í¬µÄÂß¼ÐŵÀͨ¹ýWalshÂëÀ´Çø·Ö¡£
CDMAÊÇÀ©ÆµÍ¨ÐŵÄÒ»ÖÖ£¬Ëû¾ßÓÐÀ©ÆµÍ¨ÐŵÄÒÔÏÂÌص㣺
£¨1£©¿¹¸ÉÈÅÄÜÁ¦Ç¿¡£ÕâÊÇÀ©ÆµÍ¨ÐŵĻù±¾Ìص㣬ÊÇËùÓÐͨÐÅ·½Ê½ÎÞ·¨±ÈÄâµÄ¡£
£¨2£©¿í´ø´«Ê䣬¿¹Ë¥ÂäÄÜÁ¦Ç¿¡£
£¨3£©ÓÉÓÚ²ÉÓÿí´ø´«Ê䣬ÔÚÐŵÀÖд«ÊäµÄÓÐÓÃÐźŵŦÂʱȸÉÈÅÐźŵŦÂʵ͵ö࣬Òò´ËÐźźÃÏóÒþ±ÎÔÚÔëÉùÖУ»¼´¹¦ÂÊ»°ÃܶȱȽϵͣ¬ÓÐÀûÓÚÐźÅÒþ±Î¡£
£¨4£©ÀûÓÃÀ©ÆµÂëµÄÏà¹ØÐÔÀ´»ñÈ¡Óû§µÄÐÅÏ¢£¬¿¹½Ø»ñµÄÄÜÁ¦Ç¿¡£
ÀûÓÃÈÅÂë¼¼Êõ£¬¾Í¿ÉÒÔÃÖ²¹ÆµµãÉٵIJ»×㣡
CDMAͨÐÅ£¬ÈÅÂëµÄ×÷ÓãºÒª·ÖÉÏÐкÍÏÂÐÐÁ´Â·À´¿¼ÂÇ£º
ÈÅÂë¾ÍÊǾÍÊÇÓÃÒ»¸öαËæ»úÂëÐòÁжÔÀ©ÆµÂë½øÐÐÏà³Ë£¬¶ÔÐźŽøÐмÓÃÜ¡£
ÉÏÐÐÁ´Â·ÎïÀíÐŵÀ¼ÓÈŵÄ×÷ÓÃÊÇÇø·ÖÓû§£¬ÏÂÐÐÁ´Â·¼ÓÈÅ¿ÉÒÔÇø·ÖСÇøºÍÐŵÀ¡£
ÔÚÉÏÐÐÁ´Â·ÖУ¬ÈÅÂëÇø·ÖÓû§£¬À©ÆµÂ루Ҳ½ÐÐŵÀ»¯Â룩Çø·Öͬһ¸öÓû§µÄ²»Í¬ÐŵÀ£¨ÎïÀíÊý¾Ý£¨DPDCH£©ºÍ
¿ØÖÆÐŵÀ£¨DPCCH£©£©;ÏÂÐÐÁ´Â·ÖУ¬ÈÅÂë¿ÉÒÔÓÃÀ´Çø·Ö²»Í¬µÄСÇø£¬ÓÃÀ©ÆµÂëÇø·ÖͬһСÇøÖв»Í¬µÄÓû§¡£WCDMA ÖоÍÊÇÀûÓÃÀ©ÆµÂëºÍÈÅÂëÀ´¼õÉÙ¶àÓû§Ö®¼ä¸ÉÈÅ¡£
¸ÉÈÅËæ»ú»¯
Æäʵ£¬CDMAÖÐʹÓÃÈÅÂë×îÖ÷ÒªµÄÄ¿µÄÊǸÉÈÅËæ»ú»¯¡£ÀýÈ磺ÔÚÇ°Ïò£¬Ê¹ÓÃÁËÁ¼ºÃµÄÈÅÂëºó£¬ÆäËûСÇøÀ´µÄÐźſÉÒÔ½üËÆ¿´×÷ÊǸß˹ÔëÉù¡£ÎÒÃÇÖªµÀ¸ß˹ÔëÉùÊÇ×îºÃµÄÔëÉù¡£ÖÁÓÚ¼ÓÃܵÈÆäËû¹¦ÄÜÄǶ¼ÊÇ´ÎÒªµÄ¡£
ÔÚWCDMAÖУ¬ÏÂÐÐÓÐÖ÷ÈÅÂëºÍ¸¨ÈÅÂë¡£¸¨ÈÅÂëÓÃÀ´À©Õ¹ÐŵÀÂëµÄ¿Õ¼ä¡£È·±£ÏµÍ³ÊǸÉÈÅÊÜÏ޵Ķø²»ÊÇÂëÊÜÏ޵ġ£ÔÚÉÏÐУ¬ÒòΪWCDMA²»ÊÇͬ²½ÏµÍ³£¬ËùÒÔÿ¸öÓû§Ê¹ÓöÀÁ¢µÄOVSFÂë¿Õ¼ä¡£Òò´ËÓÃÈÅÂëÀ´½øÐÐÓû§¼äµÄ¸ôÀë¡£ÔÀíÒ»Ñù£¬Ò²ÊǸÉÈÅËæ»ú»¯¡£
Èç¹ûÈÅÂëÌ«¶Ì»òÉè¼Æ²»ºÃ£¬¾ÍÆð²»µ½¸ÉÈÅËæ»ú»¯µÄ×÷ÓᣵäÐ͵ÄÀý×ÓÊÇTD-SCDMA,ÓõÄÊÇ16bitµÄÈÅÂ롣Ч¹ûºÜ²î£¬´ó´óÓ°ÏìÁËTD-SCDMAµÄϵͳÐÔÄÜ¡£¿ÉÄÜÊÇTD-SCDMAÔçÆÚµÄÉè¼ÆÕ߶ÔÈÅÂëµÄÈÏʶÓоÖÏÞÐÔ¡£ÁíÍ⣬ÒòΪÖÇÄÜÌìÏßµÄʹÓã¬Óû§ÃæµÄÐÅÔë±È±È½Ï¸ß¡£µ«ÊÇÒòΪÂë×ÊÔ´ÊÜÏÞ£¨TD-SCDMAûÓÐʹÓø¨ÈÅÂëÇÒÀ©ÆµÒò×Ó×î´óÊÇ16£©£¬TD-SCDMAÓû§ÃæµÄÄÜÁ¦Ã»Óгä·Ö·¢»Ó¡£
»Ø´ðÕߣº
OscarDon
»Ø´ðʱ¼ä£º2010-05-06 16:03
7 10
Ëùν¶þÔØƵ£¬Ö¸µÄÊÇÔÚCDMAÍøÂçÖеÄij¸öСÇø£¨ÉÈÇø£©£¬¿ªÆôÁËÉÏƪËù˵µÄÔز¨ÖеÄÁ½¸ö£¡
»Ø´ðÕߣº
OscarDon
»Ø´ðʱ¼ä£º2010-05-06 16:04
9 10
±ÈÈ磺 ¸÷¼ÓÒ»¸öÓïÒôºÍDOÔØƵ£¬¾ÍÊǶþÔØ¡£¡£¡£
»Ø´ðÕߣº
jinfeng330
»Ø´ðʱ¼ä£º2010-05-15 13:11
9 9
ÖÐÐÄСÇøÓëµ¥ÔØƵСÇø²»ÏàÁÚ,ÆäÖÜΧ¶¼ÊÇË«ÔØƵСÇø£¨½ö¶ÔË«ÔØƵ¶øÑÔ£©£¬Õý³£Çé¿öÏ£¬ÔÚÖÐÐÄСÇøʹÓõڶþÔØƵ½øÐÐͨѶµÄÓû§Ö»»á·¢ÉúͬƵÇл»£¬¶ø²»»á·¢Éú»»ÆµÇл»µ½»ù±¾ÔØƵ, ÒòΪÈç¹ûÖÕ¶ËËùÔÚµ±Ç°Ð¡ÇøÓëÏàÁÚСÇø¾ßÓÐÏàͬµÄÔØƵ£¬ÔòÖն˿ÉÒÔÇл»µ½ÏàÁÚСÇøµÄÏàͬÔØƵ£¬»ùÕ¾»á¾¡Á¿±£Ö¤Öն˽øÐÐͬƵÇл»£¬¶ø²»ÊÇ»»ÆµÇл»¡£Í¬ÆµÇл»¿ÉÒÔ·¢ÉúÔÚµÚÒ»ÔØƵ»òµÚ¶þÔØƵÉÏ£¬Á½ÕßµÄÇл»¹ý³ÌÍêÈ«Ïàͬ¡£
ÖÐÐÄСÇøµÄµÚ¶þÔØƵÐŵÀÅäÖÃÓë»ù±¾ÔØƵһÖ£¬°üÀ¨Í¬²½¡¢Ñ°ºô¡¢½ÓÈëµÈ¿ªÏúÐŵÀ£¬ÖÐÐÄСÇø¸²¸ÇÇøÓòÄÚµÄÊÖ»ú¸ù¾ÝÆäIMSI»ù±¾¾ùÔÈ´ý»úÔÚÁ½¸öÔØƵÉÏ£¬²¢·Ö±ð´ÓÕâÁ½¸öÔØƵ½ÓÈë¡£
ÖÐÐÄСÇøµÄµÚ¶þÔØƵÐŵÀÅäÖÃÓë»ù±¾ÔØƵһÖ£¬°üÀ¨Í¬²½¡¢Ñ°ºô¡¢½ÓÈëµÈ¿ªÏúÐŵÀ£¬ÖÐÐÄСÇø¸²¸ÇÇøÓòÄÚµÄÊÖ»ú¸ù¾ÝÆäIMSI»ù±¾¾ùÔÈ´ý»úÔÚÁ½¸öÔØƵÉÏ£¬²¢·Ö±ð´ÓÕâÁ½¸öÔØƵ½ÓÈë¡£
»Ø´ðÕߣº
waterzl520
»Ø´ðʱ¼ä£º2010-05-15 13:53
10 8
·¹ý£¬Ñ§Ï°Ñ§Ï°
»Ø´ðÕߣº
Òì¾³ÆæÔµ
»Ø´ðʱ¼ä£º2010-05-15 21:33
10 12
ÈȵãÎÊÌâ
¸ü¶à¾«²Ê
ÁªÏµÎÒÃÇ - ÎÊͨÐÅר¼Ò | Powered by MSCBSC Òƶ¯Í¨ÐÅÍø © 2006 - |