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Method and apparatus for fine frequency synchronization in wireless broadband (WiBro) system without using global positioning system (GPS) receiver

机译:在不使用全球定位系统(GPS)接收机的情况下在无线宽带(WiBro)系统中进行精细频率同步的方法和装置

摘要

Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a frequency offset, in a base station or a wireless repeater without using a GPS receiver. The fine frequency synchronization method includes: (a) performing despreading on received adjacent subcarrier sequences, using a PN sequence transmitted from a transmitting party; (b) obtaining ratios of correlative values obtained by the despreading; and (c) estimating a frequency offset on the basis of the ratio of correlative values. Accordingly, fine frequency offset estimation with relatively low complexity is possible without using a GPS receiver in a WiBro environment where interference signals of other base stations or repeaters exist.
机译:提供一种WiBro系统的精细频率同步方法,尤其是提供一种精细频率同步方法,该精细频率同步方法使用PN序列的正交性来测量相邻子载波的接收信号的扩展度,从而估计基站或基站中的频率偏移。不使用GPS接收器的无线中继器。精细频率同步方法包括:(a)使用从发送方发送的PN序列对接收到的相邻子载波序列进行解扩; (b)获得通过解扩获得的相关值的比率; (c)基于相关值的比率来估计频率偏移。因此,在存在其他基站或中继器的干扰信号的WiBro环境中,无需使用GPS接收机,就可以以较低的复杂度进行精细的频率偏移估计。

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