发明名称 Shaped load modulation in a near field communications (NFC) device
摘要 A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.
申请公布号 EP2582063(A3) 申请公布日期 2017.03.22
申请号 EP20120005817 申请日期 2012.08.10
申请人 NXP USA, Inc. 发明人 Clarke, David S.
分类号 H04B5/00 主分类号 H04B5/00
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