cdma2000 1xEVDO???????????
???????????? ???????[ 2013/2/22 10:15:39 ] ????????
????cdma2000 1xEV-DO???????????
????1?????????
??????????????????????????????????????????????????????????????????????????????????????
????1)??ΧС?????
????i.??С??????(???????1x???)
????ii.??С??????50%(????)
????2)??ΧС?????м???50%
????i.??С??????
????ii.??С??????50%(????)
???????????????????????????·????20??40km/h???????С????????????????????AT??????????????????????????????????????????????AT???????????????????????????????????????????μ?Ec/Io????????????????λ??仯???????????????????????????DRC????????????AT???書????????????PER?????λ??仯?????????????(RLP????ò?)???????????????????????????????????RRI????????????AT???書???????λ??仯??????????????PER??AN???????????????仯??????????3??????????????????????Ec/Io?????λ??仯?????????????????????????ο????ж?С???????????????????????????????????????????
????2????????????
??????????????????????С?????????????????С???????????????????ж???????2??????????????????????????????????????
????1)????е?С??????????????(???????1x???)
????2)????Χ????С??????????????50%????????
????????????????????????????????????????????????????????Χ????С??????????????50%???????????C/I????????С??3??????????????????????????С??3????в????
????????C/I=10dB?????
?????е?C/I=5??10dB??
???????C/I=0??5dB??
?????????????????£?
????1)????????????????????????????????????С??3????????????????????????6???????????RLP?????ò?????????????????
????2)?????????????????????????????????????????????????????????????·????20??40km/h???????С????????????????RLP?????ò?????????????????
????3)?????????????????????????????AT??????????????3????е?3??????2?????AT??????FTP???????????????????6????(????????)????AT????????????AT??????????????????????????????????????????????????
????4)????????????????????????????AT??????????????3????е?3??????2?????AT??????FTP??????????????????(????????????)?????????Я??ЩAT???????????·????20??40km/h??????????????????????????????????????AT??????????????????????????????????????????????????
????3?????????
????cdma2000 1xEV-DO???л??????????????????й?????????????????????????????·?????????????????????????????????????????????????(??PER)??????????????????????????????????Eb/N0????????AT???書?????????
?????????С?????????????·???????????????????????????????????????=5km/h??????=30km/h??????>=60km/h?????·?????????AT?????????Ec/Io??AT???書?????AN????Eb/N0??????PER????????????????????????????????????
????4??cdma2000 1xEV-DO?????л?
????cdma2000 1xEV-DO?????л????????????PDSN??PCF???????л?(????)??????????PDSN??PCF?傷???л?(????)??????????PDSN??PCF??????????л???????
??????4??AT????????????????????·??????????????(????????=30km/h??????>=60km/h)??4??AT??????100???л?????????AT??????AT?????????????Ч????????ж?AT??????л?????????????A??????AT?????????????????????????л????????????????????л????????????????????????????????л????AT??IP???????????
????5???????·DRC???????
?????????·DRC??????????????????????????????????п????DRC???????????????????????????
??????AT????С????????????????RL MAC transition probabilities vector?1??????AN????????????????????AT??“Early Termination”????(??HARQ????)?????AT???????????AT??DRC???0x1??0x0c??AT???FTP???????????????????С????????????????(?磺1M??2MB??5MB??10MB)?? ??????????????????????????AT???????DRC???????????
????6?? HARQ???????
????HARQ??????cdma2000 1xEV-DO?в????????????????????????????????????????(FEC)????????????η???????????????????????????????????????????????????
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