RFID reader and RF transmission method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsJin-Hun Koo, Young-Hoon Min, Si-Gyoung Koo, Il-Jong Song, Kuang-Woo Nam
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Abstract
A Radio Frequency (RF) transmission method of a Radio Frequency Identification (RFID) reader using a plurality of channels is provided. The method includes: selecting at least part of the plurality of channels, measuring an RF power of each of the selected channels, determining a transmission environment of the RF according to a measurement determination, and modulating an RF signal according to the determined transmission environment.
Claims19
A Radio Frequency (RF) transmission method of a Radio Frequency Identification (RFID) reader, the method comprising:
- selecting at least a part of a plurality of channels of the RFID;
- measuring an RF power of each of the selected channels;
- determining a transmission environment according to the measured RF powers;
- and
- modulating an RF signal according to the determined transmission environment, wherein the step of determining comprises:
- determining a total count of the measured channels having a higher RF power than a reference power;
- and
- determining the transmission environment based on a comparison of the total count and a reference number.
An RFID reader comprising:
- an RF power detector configured to select at least part of a plurality of channels and measuring an RF power of each of the selected channels;
- a controller configured to receive the RF power of each of the selected channels from the RF power detector and determining a transmission environment;
- and
- a baseband modulator for modulating an RF signal according to the determined transmission environment and in response to a select signal of the controller,
- wherein the controller is configured to generate a total count of the selected channels having a higher RF power than a reference power and determine the transmission environment based on a comparison of the total count and a reference number.
A Radio Frequency (RF) transmission method of a Radio Frequency Identification (RFID) reader, the method comprising:
- selecting at least a part of a plurality of channels of the RFID;
- measuring an RF power of each of the selected channels;
- incrementing a count for each RF power measured to exceed a reference power;
- modulating an RF signal using Double-SideBand Amplitude-Shift Keying if the count is less than the reference value;
- and
- modulating an the RF signal using Phase-Reversal Amplitude-Shift Keying if the count is greater than the reference value.
Dependencies are inferred from the claim text.