公开(公告)号：KR101247584B1

公开(公告)日：2013-03-26

申请号：KR1020110147061

申请日：2011-12-30

Applicant: 국민대학교산학협력단

Inventor： 장영민 ,  최선웅 ,  우띤무하마드샤힌

IPC: G06K17/00

CPC classification number: H04W88/12 ,  H04B7/0857 ,  H04B10/116 ,  H04B10/502

Abstract: PURPOSE: A site diversity method in an LED-ID system is provided to smoothly perform communication between an LED-ID tag and an LED-ID tag without a fading phenomenon and the use of additional bandwidths and to reduce power consumption. CONSTITUTION: An LED-ID reader measures an SNR(Signal to Noise Ratio) of MRC(Maximum Ratio Combining) paths. If the highest SNR is greater than or the same as a threshold value, the LED-ID reader activates an MRC path having the highest SNR to receive a signal. Otherwise, the LED-ID reader sequentially adds up SNRs lower than the highest SNR and stops the addition when the added value is greater than the threshold value. The LED-ID reader activates only MRC paths having the SNRs included in the addition to perform site diversity in an MRC mode.

Abstract translation: 目的：提供LED-ID系统中的站点分集方法，以平滑地执行LED-ID标签与LED-ID标签之间的通信，而不会出现衰落现象和使用额外的带宽并降低功耗。 规定：LED-ID读取器测量MRC（最大比例组合）路径的SNR（信噪比）。 如果最高SNR大于或等于阈值，则LED-ID读取器激活具有最高SNR的MRC路径以接收信号。 否则，LED-ID读取器顺序相加SNR低于最高SNR，并且当附加值大于阈值时停止添加。 LED-ID读取器仅激活具有包括在附加中的SNR的MRC路径以在MRC模式中执行站点分集。