METHOD AND SYSTEM FOR ESTIMATING CHANNEL BASED ON SIGNAL FIELD CHANNEL INFORMATION IN WIRELESS LOCAL AREA NETWORK (WLAN) SYSTEM

• US 20140314063A1
• Filed: 04/18/2014
• Published: 10/23/2014
• Est. Priority Date: 04/18/2013
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: OH, Jong Ee, LEE, Sok Kyu, LEE, Hee Soo, YU, Chan Wahn
• Application Number:
  US14/256,116
• Publication Number:
  US 20140314063A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0228 with direct estimation from sounding signals
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Provided is a method of estimating a channel based on signal field channel information in a wireless local area network (WLAN) system, the method including acquiring a first complex storage value based on training field channel information, acquiring a second storage value based on the signal field channel information, setting a first signal and a second signal based on the first complex storage value and the second complex storage value, and generating an output signal based on the first signal and the second signal.

Claims

1. A method of estimating a channel based on signal field channel information in a wireless local area network (WLAN) system, the method comprising:

acquiring a first complex storage value based on training field channel information;

acquiring a second storage value based on the signal field channel information;

setting a first signal and a second signal based on the first complex storage value and the second complex storage value; and

generating an output signal based on the first signal and the second signal.

2. The method of claim 1, the generating includes selecting a signal having a relatively high intensity by comparing the first signal and the second signal, comparing the selected signal and a preset threshold, and determining the output signal based on a result of the comparing.

3. The method of claim 1, the determining includes determining, when the selected signal is greater than the preset threshold, the selected signal to be the output signal.

4. The method of claim 1, the determining includes determining, when the selected signal is less than or equal to the preset threshold, the first complex storage value acquired based on the training field channel information to be the output signal.

5. The method of claim 1, the setting includes applying a control signal of the signal field to the second complex storage value, and calculating the first signal and the second signal based on the first complex storage value and a result of the applying.

6. The method of claim 5, the control signal has a value of “

1”

or a value of “

−

1”

.

7. The method of claim 1, the calculating includes adding, when the control signal has the value of “

1”

, the first complex storage value to the second complex storage value and acquiring the first signal.

8. The method of claim 1, the calculating includes subtracting, when the control signal has the value of “

−

1”

, the second complex storage value from the first complex storage value, and acquiring the second signal.

9. A system of estimating a channel based on signal field channel information in a wireless local area network (WLAN) system, the system comprising:

an acquirer configured to acquire a first complex storage value based on training field channel information and a second complex storage value based on the signal field channel information;

a setting unit configured to set a first signal and a second signal based on the first complex storage value and the second complex storage value; and

a generator configured to generate an output signal based on the first signal and the second signal.

10. The system of claim 9, the generator includes a selecting unit configured to compare the first signal and the second signal and select a signal having a relatively high intensity, a comparator configured to compare the selected signal and a preset threshold, and determiner configured to determine the output signal based on a result of the comparing.

11. The system of claim 9, the determiner determines the selected signal to be the output signal when the selected signal is greater than the preset threshold.

12. The system of claim 9, the determiner determines the first complex storage value acquired based on the training field channel information to be the output signal when the selected signal is less than or equal to the preset threshold.

13. The system of claim 9, the setting unit includes an applicator configured to apply a control signal of the signal field to the second complex storage value, and a calculator configured to calculate the first signal and the second signal based on the first complex storage value and a result of the applying.