公开(公告)号：US20080117338A1

公开(公告)日：2008-05-22

申请号：US11935307

申请日：2007-11-05

Applicant: Chih-Cheng Chang ,  Ming-Che Tan

Inventor： Chih-Cheng Chang ,  Ming-Che Tan

IPC: H04N5/50

CPC classification number: H04N5/50 ,  H04N21/4345 ,  H04N21/4383

Abstract: A method for searching a frequency band to locate a channel. The method includes the steps of setting an initial frequency and a first frequency step; determining a frequency point based on the initial frequency and the first frequency step; determining whether the frequency point satisfies a first condition, which is continuously detecting a horizontal signal a predetermined number of times. When the first condition is satisfied, the frequency point is recorded as an entrance point. A second frequency step based on the entrance point determines a second frequency point, wherein the second frequency step is less than the first frequency step. It is then determined if a channel exists at the second frequency point. The entrance point is recorded as the updated initial frequency for the next search. The described steps are repeated for the entire frequency band.

Abstract translation: 一种用于搜索频带以定位频道的方法。 该方法包括设置初始频率和第一频率步长的步骤; 基于初始频率和第一频率步长确定频点; 确定频点是否满足预定次数连续地检测水平信号的第一条件。 当满足第一条件时，将频率点记录为入口点。 基于入口点的第二频率步骤确定第二频率点，其中第二频率步长小于第一频率步长。 然后确定在第二频率点是否存在信道。 入口点被记录为下次搜索的更新的初始频率。 对于整个频带重复描述的步骤。