移动通信
移動通信
이동통신
MOBILE COMMUNICATIONS
2014年
2期
3-6
,共4页
WCDMA%多RRU级联%正负频偏
WCDMA%多RRU級聯%正負頻偏
WCDMA%다RRU급련%정부빈편
WCDMA%multiple RRU cascade%positive and negative%frequency offset
高铁WCDMA多RRU级联共小区组网虽然能够减少小区切换，但是由于多普勒效应，UE会收到两个不同频率的共小区信号，解调功能受到严重的影响，从而导致掉话，同时吞吐率急剧下降，这种现象在某些非高通芯片的WCDMA手机中特别明显。基于此，重点对多RRU级联共小区的原理以及出现的掉话问题进行分析，并提出了解决方式建议。
高鐵WCDMA多RRU級聯共小區組網雖然能夠減少小區切換，但是由于多普勒效應，UE會收到兩箇不同頻率的共小區信號，解調功能受到嚴重的影響，從而導緻掉話，同時吞吐率急劇下降，這種現象在某些非高通芯片的WCDMA手機中特彆明顯。基于此，重點對多RRU級聯共小區的原理以及齣現的掉話問題進行分析，併提齣瞭解決方式建議。
고철WCDMA다RRU급련공소구조망수연능구감소소구절환，단시유우다보륵효응，UE회수도량개불동빈솔적공소구신호，해조공능수도엄중적영향，종이도치도화，동시탄토솔급극하강，저충현상재모사비고통심편적WCDMA수궤중특별명현。기우차，중점대다RRU급련공소구적원리이급출현적도화문제진행분석，병제출료해결방식건의。
Multiple RRU cascade networking in the same cell can reduce cell handover in high-speed railway, however, because of Doppler effect, UE may receive two signals with two different frequencies and its demodulation function is severely affected, leading to drop call and low throughput rate. These are usually emerged in some WCDMA mobile phones with non-Qualcomm chips. The theory of multiple RRU cascade networking in the same cell and drop call problems are analyzed, in addition, the advice and solutions are proposed.
