RSSI(Received Signal Strength Indicator)是接收信号的强度指示,它的实现是在反向通道基带接收滤波器之后进行的。 为了获取反向信号的特征,在RSSI的具体实现中做了如下处理:在104us内进行基带IQ功率积分得到RSSI的瞬时值,即RSSI(瞬时)=sum(I^2+Q^2);然后在约1秒内对8192个RSSI的瞬时值进行平均得到RSSI的平均值,即...
一般 RSS 的强度受到三个方面影响:1)路径衰减;2)遮挡;3)多径效应。 RSSI(received signal strength indicator): 是接受信号强度指示,通过人为处理,而得到的信号强度。一般,RSS负数不太好理解,可以通过变换转化为正值。无线局域网供应商可以按照私有方式定义RSSI值,即通过某种公式将原有RSSI的区间映射为自己定义的区间...
由于多径衰落 (multipath fading) 和 时间动态(temporal dynamics) 的原因, RSSI在复杂环境中性能急剧下降。与 RSSI 不同,PHY 层的功率特征(power feature)即信道响应(channel response)能够区分多径特征,因此具有实现精确普适(pervasive)室内定位的潜力。从概念上讲,对RSSI来说信道响应类似于阳光下的彩虹,不同波长成...
we develop a RSSI-based parameters correction emergency disaster response system.We propose a RSSI-based parameter correction schema to tackle the problem of instability for RSSI information.We also give the system architecture of the emergency disaster response system.The system was implemented on VS...
Different from RSSI, the PHY layer power feature, channel response, is able to discriminate multipath characteristics, and thus holds the potential for the convergence of accurate and pervasive indoor localization. Channel State Information (CSI, reflecting channel response in 802.11 a/g/n) has ...
那RSSI就是在标准搜索的基础上会附带RSSI,那么EIR(EXTENDED INQUIRY RESPONSE)就是在这些基础上会附带额外的一些信息,比如remote name,对方支持的UUID等(前提是对方注册了EIR)。 EIR信息不管是否有效数据是多少byte,最终都要240byte EIR Data Structure的格式为:1Byte length nByte type(一般是1byte) n byte EIR ...
Liu, "From RSSI to CSI: Indoor localization via channel response," ACM Comput. Surveys, vol. 46, no. 2, p. 25, Dec. 2013.Yang, Z.; Zhou, Z.; Liu, Y. From RSSI to CSI: Indoor localization via channel response. ACM Comput. Surv. (CSUR) 2013, 46, 25. [CrossRef]...
axios response 参数 response-rssi 1.概述Received Signal Strength Indication接收的信号强度指示,无线发送层的可选部分,用来判定链接质量,以及是否增大广播发送强度。通过接收到的信号强弱测定信号点与接收点的距离,进而根据相应数据进行定位计算的一种定位技术如无线传感的ZigBee网络CC2431芯片的定位引擎就采用的这种技术...
A transceiver which keeps circuitry associated with a receiver in a powered down state during periods when a Received Signal Strength Indicator (RSSI) indicates that a signal being received is below a pre-determined threshold level, and ... DJ Morelli,ML Trompower 被引量: 289发表: 2005年 Intr...
Design NoteDN510 CC112X RSSI and CS Response Time By Fredrik Eriksen Keywords CC1120 CC1121 CC1125 RSSI CS 1 Introduction In most wireless applications there is a need for low current draw, and one of the features implemented in the CC112X (CC1120, CC1121, CC1125) to facilitate this, ...