Fig. 4From: Coherent query scheme for wireless backscatter communication systems with single tagPDF of backscatter channel by increasing the number of co-phased TX transmitters. a PDF results from analytical expressions for M = 1, 2, 3,4 transmitters with the proposed phase adjustment and coherent transmitter (the PDF for monostatic, bistatic, and Rayleigh are also illustrated for comparison). b The numerical results of PDF with channel realizationBack to article page