信道实时自适应Wi-Fi设备设计  

Channel real⁃time adaptive Wi-Fi equipment design

作　　者：淡江 DAN Jiang(Hangzhou Hikvision Digital Technology Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]杭州海康威视数字技术股份有限公司,浙江杭州310000

出　　处：《电子设计工程》2022年第18期73-76,81,共5页Electronic Design Engineering

摘　　要：2.4 GHz频段无线局域网只有13个信道,且临近信道频谱相互重叠,信道间干扰问题突出,导致吞吐量下降,无法满足较高可靠性的通信需求。针对该问题,基于RTL8197FNT、RTL8188EUS、Hi3516D三个常规商用芯片设计了硬件和软件,实现了实时信道干扰扫描、信道质量排序和信道自适应切换功能。在信道质量排序中,主要解决了临近信道干扰问题。实测结果表明,干扰导致吞吐量下降时,设备能够在短时间内跳转至合适信道,迅速恢复目标吞吐量。证明了采用常规商用芯片设计高可靠性、低成本无线局域网设备的可行性。The 2.4 GHz band wireless local area network has only 13 channels.The adjacent channel spectrum overlaps each other.The problem of inter⁃channel interference is prominent,which leads to a decrease in throughput and cannot meet the communication requirements of higher reliability.In response to this problem,hardware and software were designed based on three conventional commercial chips,RTL8197FNT,RTL8188EUS and Hi3516D,to achieve real⁃time channel interference scanning,channel quality sorting and channel adaptive switching functions.In the channel quality ranking,the problem of adjacent channel interference was mainly solved.The actual measurement results showed that when the interference causes the throughput to drop,the device can jump to the appropriate channel in a short time and restore the target throughput.It proved the feasibility of using conventional commercial chips to design high⁃reliability and low⁃cost wireless LAN equipment.

关 键 词：WI-FI 信道扫描 信道自适应 干扰规避 RTL8197FNT RTL8188EUS 

分 类 号：TN802[电子电信—信息与通信工程]