APPARATUS AND METHODS FOR DISPLAYING SIGNAL CHARACTERISTICS

• US 20080212664A1
• Filed: 07/18/2007
• Published: 09/04/2008
• Est. Priority Date: 07/19/2006
• Status: Active Grant

• Current Assignee: Tektronix International Sales GmbH (Fortive Corp.)
• Original Assignee: Tektronix International Sales GmbH (Fortive Corp.)
• Inventors: Yoshihara, Koichi
• Granted Patent: US 8,374,230 B2
• Time in Patent Office: Days
• US Class Current: 375/228
• CPC Class Codes: H04B 17/23 Indication means, e.g. displays, alarms, audible means
• CPC Class Codes: H04B 17/26 using historical data, averaging values or statistics
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 17/318 Received signal strength

Abstract

A receiver 31 receives a wireless signal of, for example, an RFID system that conducts communication with a wireless signal based on reflection modulation. A demodulation block 33 demodulates the received signal obtained at the receiver 31 with orthogonal demodulation. A display block 36 provides signal points derived from the orthogonal demodulation onto an orthogonal coordinate display to display characteristics of the reflection modulation concerning an RF tag that conducts the reflection modulation of the wireless signal. The display of the signal points may have vector display or at least numerical values indicating magnitudes of the vectors. The processed results may be stored and signal points based on the stored results may be displayed on the orthogonal coordinate to compare sets of the characteristics of the reflection modulations on the display.

Claims

1. A characteristics display apparatus comprising:

a receiving block for receiving a wireless signal of a wireless communication system that communicate using a wireless signal with reflection modulation;

a demodulation block for demodulating the received signal obtained at the receiving block; and

a display block for displaying the processed results of the demodulation process, wherein the demodulation block conducts an orthogonal demodulation as the demodulation process and the display block provides signal points on an orthogonal coordinate display based on the processed results to display characteristics of the reflection modulation.

2. The characteristics display apparatus as recited in claim 1, wherein the display block displays the signal points as vectors.

3. The characteristics display apparatus as recited in claim 2, wherein the display block displays at least magnitudes of the vectors.

4. The characteristics display apparatus as recited in claim 1, wherein the display block stores the processed results and also provides signal points base on the stored processed results on the orthogonal coordinate display to display sets of characteristics of the reflection modulation for comparison.

5. A characteristics display method comprising the steps of:

demodulating a received signal obtained by receiving a wireless signal of a wireless communication system that communicates using a wireless signal with reflection modulation; and

displaying processed results of the demodulation process, wherein the displaying step provides signal points on an orthogonal based on the processed results to display characteristics of the reflection modulation

6. The characteristics display method as recited in claim 5, wherein the signal points are displayed as vectors in the displaying step.

7. The characteristics display method as recited in claim 6, wherein at least magnitudes of the vectors are displayed in the displaying step.

8. The characteristics display method as recited in claim 5, wherein the processed results are stored and signal points base on the stored processed results are displayed on the orthogonal coordinate to display sets of characteristics of the reflection modulation as they can be compared in the displaying step.