A Synchronization Algorithm for TDD Active Optical Distribution Systems
Wei Wang, Zhi-de Li
Available Online December 2016.
- https://doi.org/10.2991/icwcsn-16.2017.76How to use a DOI?
- active optical distribution system; primary synchronization; secondary synchronization
- As a new wireless network coverage device, the active optical distribution system used for coverage enhancement of GSM, TD-SCDMA and TD-LTE wireless networks has many merits, such as green, micro power, multi-antenna and multipoint uniform depth coverage when compared with the traditional indoor distribution system. As an extension system of the base station wireless network, the active optical distribution system is required to obtain accurate time synchronization information of the TDD system in order to work normally according to the uplink and downlink time slots alignment of the base station. Therefore synchronization problem becomes a primary issue in the active optical distribution system. In this paper, TD-LTE time-frequency synchronization process and primary and secondary synchronous detection algorithm are firstly investigated. Then the time-frequency synchronization algorithm and the influence of frequency offset on the timing synchronization algorithm are analyzed. The simulation results show that a range of frequency offset has little effect on the timing synchronization accuracy. In the TDD-LTE secondary synchronization signal detection process, the traditional method is 168 groups of secondary synchronization sequence and the received sequence to do a length of 62-bit crosscorrelation operation, whose computation is huge. In this paper, a new parity separation-based method is proposed, which is 31 times the length of 31-bit synchronous crosscorrelation operation. The proposed method is proved to have lower complexity i.e., one-tenth calculation times of the traditional method.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Wei Wang AU - Zhi-de Li PY - 2016/12 DA - 2016/12 TI - A Synchronization Algorithm for TDD Active Optical Distribution Systems PB - Atlantis Press SP - 355 EP - 360 SN - 2352-538X UR - https://doi.org/10.2991/icwcsn-16.2017.76 DO - https://doi.org/10.2991/icwcsn-16.2017.76 ID - Wang2016/12 ER -