ÎÊÌâÒÑ¿ªÆô
(ÆÕͨÎÊÌâ)
ʲôÊÇСÇøÄÚÇл» ÌøƵÓëСÇøÄÚÇл»¹Øϵ
ʲôÊÇСÇøÄÚÇл» ÌøƵÓëСÇøÄÚÇл»¹Øϵ
ÌáÎÊÕß: lmt ÌáÎÊʱ¼ä: 2010-04-26
• ÎÞÖ÷µ¼Ð¡ÇøÓÐÄÄЩ½â¾ö·½·¨£¿ 2009-10-26
• °®Á¢ÐÅ£¬RBS3206,СÇøÅäÖá¡¡°RB1¡±´ú±íʲôÒâ˼£¿ 2009-10-26
• ijСÇøµÄÎÞÏßÁ´Â·Ê§°Üµô»°ÓëÇл»µô»°Í¬Ê±Ôö¼Ó 2009-10-26
• Çë½ÌÒ»¸ö»ªÐÇСÇø±íµÄÖÆ×÷µÄÎÊÌâ 2009-10-26
• СÇøÖØÑ¡ÖͺóÖµ£¨CRH£© 2009-10-25
• Çë½ÌÊý¾ÝÓµÈûСÇø¼ÆËãÐèµ÷ÕûµÄcded,cdefµÄ´óС? 2009-10-22
• СÇø¼ä·Öµ£»°ÎñÁ¿µÄ·½·¨¾ßÌåÓÐÄÄЩ£¿ 2009-10-22
• GSM 10MHZ 4¸öСÇø¸´ÓÃÏÂÿ¸öСÇøµÄÒµÎñÐŵÀºÍ¿ØÖÆÐŵÀµÄÊýÁ¿ 2009-10-21
• °®Á¢ÐÅ£¬RBS3206,СÇøÅäÖá¡¡°RB1¡±´ú±íʲôÒâ˼£¿ 2009-10-26
• ijСÇøµÄÎÞÏßÁ´Â·Ê§°Üµô»°ÓëÇл»µô»°Í¬Ê±Ôö¼Ó 2009-10-26
• Çë½ÌÒ»¸ö»ªÐÇСÇø±íµÄÖÆ×÷µÄÎÊÌâ 2009-10-26
• СÇøÖØÑ¡ÖͺóÖµ£¨CRH£© 2009-10-25
• Çë½ÌÊý¾ÝÓµÈûСÇø¼ÆËãÐèµ÷ÕûµÄcded,cdefµÄ´óС? 2009-10-22
• СÇø¼ä·Öµ£»°ÎñÁ¿µÄ·½·¨¾ßÌåÓÐÄÄЩ£¿ 2009-10-22
• GSM 10MHZ 4¸öСÇø¸´ÓÃÏÂÿ¸öСÇøµÄÒµÎñÐŵÀºÍ¿ØÖÆÐŵÀµÄÊýÁ¿ 2009-10-21
ÎÊÌâ´ð°¸
( 8 )
СÇø¼äÇл»ÊÇÔÚBTSϵÄÁ½¸ö²»Í¬µÄСÇø¼ä½øÐÐÇл»£¬Ð¡ÇøÄÚÇл»ÔòÊÇÒ»ÖÖ¸üÈíÇл»ÊÇÔÚͬһ¸öСÇø¼äÖØÐÂÅäÖÃÁ´Â·Çé¿ö
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿¡£Õâ¸ö¹¦ÄÜÔÚBSCÖÐÖ´ÐÐ
ÐźÅÇ¿¶È½Ï¸ßʱ£¬ÎÞÂÛÊÇÉÏÐÐÁ´Â·»¹ÊÇÏÂÐÐÁ´Â·µ±ÔÚͬһʱ¼ä²âÁ¿µ½µÄÖÊÁ¿½Ï²îʱ£¬¿ÉÒÔÈ·¶¨ËüµÄ¸ÉÈŽÏÑÏÖØ£¬²¢ÇÒ¸ÉÈŽöÔÚµ±Ç°Õ¼ÓõÄTCH»òSDCCHÉÏ´æÔÚ¡£ÔÚÕâÖÖÇé¿öÏÂÔÚ±¾Ð¡ÇøÄÚÑ°ÕÒÒ»Ìõ½ÏºÃµÄÐŵÀµÄ¸ÅÂÊÊǽϸߵġ£¸ÉÈÅ¿ÉÒÔÊÇÔÝʱµÄÒ²¿ÉÒÔÊdz־õġ£ÔÝʱµÄͬƵ»òÁÚƵÐŵÀ¸ÉÈÅ¿ÉÄÜÊÇÆäËü»ùÕ¾µÄÏÂÐÐÁ´Â·»òÒƶ¯Ì¨µÄÉÏÐÐÁ´Â·ÐźŵÈÔÒò¡£Í¬Ê±±¾¹¦ÄÜÒ²Äܹ»½â¾ö»¥µ÷¸ÉÈŵÄÎÊÌâ¡£¶ø¶ÔÓÚÓÀ¾ÃÐԵĸÉÈÅӦͨ¹ýСÇøµÄÖØй滮À´½â¾ö¡£Ð¡ÇøÄÚÇл»¹¦ÄÜÂß¼ÊǶ¨Î»ÔËËãÖеÄÒ»¸öÍêÕûµÄ²¿·Ö
ÌøƵ¼¼Êõ (Frequency-Hopping Spread Spectrum; FHSS)ÔÚͬ²½¡¢ÇÒͬʱµÄÇé¿öÏ£¬½ÓÊÜÁ½¶ËÒÔÌض¨ÐÍʽµÄÕƵÔز¨À´´«ËÍѶºÅ£¬¶ÔÓÚÒ»¸ö·ÇÌض¨µÄ½ÓÊÜÆ÷£¬FHSSËù²úÉúµÄÌø¶¯Ñ¶ºÅ¶ÔËü¶øÑÔ£¬Ò²Ö»ËãÊÇÂö³åÔëÉù¡£
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿¡£Õâ¸ö¹¦ÄÜÔÚBSCÖÐÖ´ÐÐ
ÐźÅÇ¿¶È½Ï¸ßʱ£¬ÎÞÂÛÊÇÉÏÐÐÁ´Â·»¹ÊÇÏÂÐÐÁ´Â·µ±ÔÚͬһʱ¼ä²âÁ¿µ½µÄÖÊÁ¿½Ï²îʱ£¬¿ÉÒÔÈ·¶¨ËüµÄ¸ÉÈŽÏÑÏÖØ£¬²¢ÇÒ¸ÉÈŽöÔÚµ±Ç°Õ¼ÓõÄTCH»òSDCCHÉÏ´æÔÚ¡£ÔÚÕâÖÖÇé¿öÏÂÔÚ±¾Ð¡ÇøÄÚÑ°ÕÒÒ»Ìõ½ÏºÃµÄÐŵÀµÄ¸ÅÂÊÊǽϸߵġ£¸ÉÈÅ¿ÉÒÔÊÇÔÝʱµÄÒ²¿ÉÒÔÊdz־õġ£ÔÝʱµÄͬƵ»òÁÚƵÐŵÀ¸ÉÈÅ¿ÉÄÜÊÇÆäËü»ùÕ¾µÄÏÂÐÐÁ´Â·»òÒƶ¯Ì¨µÄÉÏÐÐÁ´Â·ÐźŵÈÔÒò¡£Í¬Ê±±¾¹¦ÄÜÒ²Äܹ»½â¾ö»¥µ÷¸ÉÈŵÄÎÊÌâ¡£¶ø¶ÔÓÚÓÀ¾ÃÐԵĸÉÈÅӦͨ¹ýСÇøµÄÖØй滮À´½â¾ö¡£Ð¡ÇøÄÚÇл»¹¦ÄÜÂß¼ÊǶ¨Î»ÔËËãÖеÄÒ»¸öÍêÕûµÄ²¿·Ö
ÌøƵ¼¼Êõ (Frequency-Hopping Spread Spectrum; FHSS)ÔÚͬ²½¡¢ÇÒͬʱµÄÇé¿öÏ£¬½ÓÊÜÁ½¶ËÒÔÌض¨ÐÍʽµÄÕƵÔز¨À´´«ËÍѶºÅ£¬¶ÔÓÚÒ»¸ö·ÇÌض¨µÄ½ÓÊÜÆ÷£¬FHSSËù²úÉúµÄÌø¶¯Ñ¶ºÅ¶ÔËü¶øÑÔ£¬Ò²Ö»ËãÊÇÂö³åÔëÉù¡£
»Ø´ðÕߣº
Ò»ÎÞËùÓÐ
»Ø´ðʱ¼ä£º2010-04-26 15:16
9 10
СÇøÄÚÇл»ÔòÊÇÒ»ÖÖ¸üÈíÇл»ÊÇÔÚͬһ¸öСÇø¼äÖØÐÂÅäÖÃÁ´Â·Çé¿ö
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿
»Ø´ðÕߣº
wangweitao
»Ø´ðʱ¼ä£º2010-04-26 16:15
7 6
ÎÒÒÔΪ¸üÈíÇл»ÊÇWCDMAÌØÓеģ¬TDÌØÓнÓÁ¦Çл»£¬½á¹û¿´ÊéGSMҲ˵µ½Ð¡ÇøÄÚÇл»£¬µ«Ò»°ã²»¿ªÆô£¡
»Ø´ðÕߣº
THJT_LJH
»Ø´ðʱ¼ä£º2010-04-26 16:42
8 9
СÇøÄÚÇл»ÔòÊÇÒ»ÖÖ¸üÈíÇл»ÊÇÔÚͬһ¸öСÇø¼äÖØÐÂÅäÖÃÁ´Â·Çé¿ö
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿Ð¡ÇøÄÚÇл»ÔòÊÇÒ»ÖÖ¸üÈíÇл»ÊÇÔÚͬһ¸öСÇø¼äÖØÐÂÅäÖÃÁ´Â·Çé¿ö
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿Ð¡ÇøÄÚÇл»ÔòÊÇÒ»ÖÖ¸üÈíÇл»ÊÇÔÚͬһ¸öСÇø¼äÖØÐÂÅäÖÃÁ´Â·Çé¿ö
СÇøÄÚÇл»ÊÇΪÁËÔÚÔÝʱÓиÉÈŵÄÇé¿öÏ»¹Äܹ»»ñµÃ½ÏºÃµÄÁ¬½ÓÖÊÁ¿
»Ø´ðÕߣº
ÊÀ½çÁú5
»Ø´ðʱ¼ä£º2010-04-26 16:56
6 6
СÇøÄÚÇл» ¾ÍÊÇÒ»¸öBSC ϵÄ2¸ö²»BTS ×é³ÉµØ2¸öСÇø¾ÍÊÇÄÚСÇø¡£
ÌøƵºÍÄÚÇл»Ã»ÓйØϵGSM ÌøƵ²»Ìøʱ¡£
ÌøƵºÍÄÚÇл»Ã»ÓйØϵGSM ÌøƵ²»Ìøʱ¡£
»Ø´ðÕߣº
¶´ºÎ°
»Ø´ðʱ¼ä£º2010-04-26 23:38
6 6
СÇøÄÚÇУºÔÚͬһÔز¨µÄ²»Í¬Ê±Ï¶ÔÚ½øÐÐÇл»»òÕßÔÚͬСÇøµÄ²»Í¬Ôز¨ÉϽøÐÐÇл»¡£
µ÷Ƶ£ºÔÚͬһʱ϶µÄ²»Í¬Ôز¨¼ä½øÐÐÒµÎñ³ÐÔØ¡£
µ÷Ƶ£ºÔÚͬһʱ϶µÄ²»Í¬Ôز¨¼ä½øÐÐÒµÎñ³ÐÔØ¡£
»Ø´ðÕߣº
yuandongjie1
»Ø´ðʱ¼ä£º2010-04-28 08:25
8 7
СÇøÄÚÇÐ---СÇøÄÚ²¿Çл»£¬ÔÚͬһСÇø²»Í¬Ê±Ï¶¼ä·¢ÉúÇл»£»
ÌøƵ---ͬһСÇøµÄ²»Í¬ÔØƵÉÏ·¢ÉúÌøת£¬µ«Ê±Ï¶²»±ä¡£
ÌøƵ---ͬһСÇøµÄ²»Í¬ÔØƵÉÏ·¢ÉúÌøת£¬µ«Ê±Ï¶²»±ä¡£
»Ø´ðÕߣº
chinatmdoc
»Ø´ðʱ¼ä£º2010-04-28 14:13
7 6
Ò»¾ä»°½âÊÍÁ½ÖÖÌøƵ¾Ù¸ö¼òµ¥µÄÀý×Ó£¬Ð¡Çø¹²ÓÐ4¸öÔØƵ£¬4¸öƵµã£¬Óû§ÏÈÏÈʹÓÃ1ÔØƵ£¬ÔÙʹÓÃ4¡¢2¡¢3£¬¸÷ÔØƵƵÂʱ£³Ö²»±ä£¬¾ÍÊÇ»ù´øÌøƵÁË£¬RFÌøƵʱ£¬Óû§¹Ì¶¨ÓÉÒ»¸öÔØƵ·¢É䣬µ«ÔØƵ²»¶ÏµÄ±ä»¯·¢ÉäƵµã¡£
sundejie1988 2011-05-07 12:14
µÈ´ý¸ßÊֻش𰡣¬ÎÒÒ²ÏëÁ˺ܾÃÁË
»Ø´ðÕߣº
jingjing101706
»Ø´ðʱ¼ä£º2010-04-28 20:24
9 7
ÈȵãÎÊÌâ
¸ü¶à¾«²Ê
ÁªÏµÎÒÃÇ - ÎÊͨÐÅר¼Ò | Powered by MSCBSC Òƶ¯Í¨ÐÅÍø © 2006 - |