CAJ | 학술논문

由于2．4 GHz频段的免授权性和开放性，新的无线系统在该频段内的自由接入必定会受到同频系统的干扰。针对上述问题，采用自适应跳频技术保证通信双方在通信中自动适应信道变化，实时避开频率集中被干扰的频点，提高通信的可靠性和抗干扰能力。首先介绍自适应跳频技术的2种相关算法，时间同步及信道评估算法，接着介绍基于CC2500的物联网设备的具体实现流程，并采用公共信道实现跳频信令的传输，在基于CC2500的物联网设备上做了具体实践，最后通过实验分析表明，该跳频算法具有一定的实用性和先进性。
유우2．4 GHz빈단적면수권성화개방성，신적무선계통재해빈단내적자유접입필정회수도동빈계통적간우。침대상술문제，채용자괄응도빈기술보증통신쌍방재통신중자동괄응신도변화，실시피개빈솔집중피간우적빈점，제고통신적가고성화항간우능력。수선개소자괄응도빈기술적2충상관산법，시간동보급신도평고산법，접착개소기우CC2500적물련망설비적구체실현류정，병채용공공신도실현도빈신령적전수，재기우CC2500적물련망설비상주료구체실천，최후통과실험분석표명，해도빈산법구유일정적실용성화선진성。
The license-free ISM 2.4 GHz band is widely used on a global scale , and the new access of wireless systems in the ISM band is interfered by other wireless systems .Aiming at this disadvantages described above , this paper presents a method based on technology of adaptive frequency hopping ( AFH) , avoiding using those frequency points interfered to improve the relia-bility and antijamming capability of communication .At first, this paper introduced two algorithms to support AFH technology:time synchronization algorithm and channel estimation algorithm , then introduced the specific implementation process of CC 2500-based IOT devices , and made a specific practice on the CC 2500-based devices .And at last , experimental analysis shows that the frequency hopping algorithm is of a certain practicality and advanced .