大众科技
大衆科技
대음과기
DAZHONG KEJI
2011年
10期
33-35
,共3页
光纤%直放站%时延测量%时延校正%CPKI%光纤时延%转发时
光纖%直放站%時延測量%時延校正%CPKI%光纖時延%轉髮時
광섬%직방참%시연측량%시연교정%CPKI%광섬시연%전발시
optical fiber%repeater%time delay measurement%time delay adjustment%CPRI%optical fiber time delay%forward time delay
提出了应用于数字光纤直放站的时延测量与校正方法。阐述了数字光纤直放站的结构、时延测量的目的与原理、时延校正的计算。时延测量以CPRI协议为基础，包括光纤时延测量、转发时延测量。时延校正分下行时延校正和上行时延校正。下行时延校正是使同一台REC送出的IQ信号在不同的RE中能够同时射频发送出去。上行时延校正是使不同的RE接收到的IQ信号能够正确进行功率合成。
提齣瞭應用于數字光纖直放站的時延測量與校正方法。闡述瞭數字光纖直放站的結構、時延測量的目的與原理、時延校正的計算。時延測量以CPRI協議為基礎，包括光纖時延測量、轉髮時延測量。時延校正分下行時延校正和上行時延校正。下行時延校正是使同一檯REC送齣的IQ信號在不同的RE中能夠同時射頻髮送齣去。上行時延校正是使不同的RE接收到的IQ信號能夠正確進行功率閤成。
제출료응용우수자광섬직방참적시연측량여교정방법。천술료수자광섬직방참적결구、시연측량적목적여원리、시연교정적계산。시연측량이CPRI협의위기출，포괄광섬시연측량、전발시연측량。시연교정분하행시연교정화상행시연교정。하행시연교정시사동일태REC송출적IQ신호재불동적RE중능구동시사빈발송출거。상행시연교정시사불동적RE접수도적IQ신호능구정학진행공솔합성。
The Method of measurement and adjustment of time delay which applies to digital optical fiber repeater has been presented. The structure of digital optical fiber repeater, the purpose and principle of time delay measurement, the calculation of time delay adjustment, has been represented. The measurement of time delay that based on CPRI protocol includes the measurement of optical fiber time delay and the measurement of forward time delay. The time delay adjustment includes uplink time delay adjustment and downlink time delay adjustment. The purpose of downlink time delay adjustment is to ensure IQ signals in different REs which comes from the same REC transmit synchronously by radio frequency signals. The purpose of uplink time delay adjustment is to ensure received IQ signals by different REs synthesize correctly by power.
