Systems and techniques for generating {TAIL ~ data} showing a signal environment experienced by {HEAD ~ a radio frequency identification communication device} 
Systems and techniques for generating { TAIL ~ data } showing a signal environment experienced by { HEAD ~ a radio frequency identification communication device }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD