Patent ID: 7151436
Filing Date: 2006-12-19
Classification: G06K,H03C

Abstract:
1. A method of wireless data transmission between a base station and a passive receiving/backscattering unit, comprising the steps: a) emitting electromagnetic waves from said base station; b) receiving said electromagnetic waves as received waves with said receiving/backscattering unit; and c) modulating and reflecting said received waves as modulated reflected waves by passive backscattering from said receiving/backscattering unit to said base station, wherein said modulating is carried out in accordance with data that are to be transmitted by said passive backscattering from said receiving/backscattering unit to said base station, and wherein said modulating comprises: so as to provide a backscattering distance range of said passive backscattering from said receiving/backscattering unit to said base station that is larger with said phase shift keying than with said amplitude shift keying, and to provide a backscattering transmission quality of said passive backscattering that is higher with said amplitude shift keying than with said phase shift keying.