APPARATUS AND METHOD FOR ANALYZING IDENTIFICATION SIGNAL BASED ON PARTIAL CORRELATION

• US 20100091908A1
• Filed: 10/12/2007
• Published: 04/15/2010
• Est. Priority Date: 10/31/2006
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Sung-Ik, Lee, Soo-In, Lee, Jae-Young, Kim, Heung-Mook, Eum, Ho-Min, Seo, Jae-Hyun, Lim, Jong-Soo
• Granted Patent: US 8,767,890 B2
• Time in Patent Office: Days
• US Class Current: 375/324
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• CPC Class Codes: H04H 20/06 among broadcast stations
• CPC Class Codes: H04H 20/12 Arrangements for observation, testing or troubleshooting
• CPC Class Codes: H04H 60/41 for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas

Abstract

Provided is an apparatus and method for analyzing identification (ID) signals by converting radio frequency (RF) signals which are transmitted with an ID signal added thereto by a transmitting part, e.g., a plurality of transmitters or repeaters, into signals of a desired band; creating ID signals that are identical to the ID signals added to the RF signals; calculating correlation values between the converted signals and the created ID signals based on partial correlation; and extracting channel profile of multi-path signals caused by a channel between the transmitting part and the ID signal analyzing apparatus from the correlation value. The technology of the present research is applied to broadcasting and communication.

Claims

1. An apparatus for analyzing identification (ID) signals, comprising:

a receiver for receiving signals with an ID signal added thereto from a transmitting part;

a signal converter for converting the received signals into signals of a desired band;

an ID signal generator for generating ID signals that are identical to the ID signals added by the transmitting part to the received signals;

a partial correlator for calculating correlation values between the converted signals acquired in the signal converter and the created ID signals acquired in the ID signal generator based on partial correlation; and

extracting channel profile from the correlation values acquired in the partial correlator.

2. The apparatus of claim 1, wherein the partial correlator includes:

a weighted summing unit for calculating partial correlation values between the converted signals acquired in the signal converter and the created ID signals acquired in the ID signal generator; and

an ensemble average unit for acquiring an accumulated average of the partial correlation values calculated in the weighted summing unit.

3. The apparatus of claim 2, wherein the weighted summing unit takes ID signals as much as a partial correlation length from the generated ID signals acquired in the ID signal generator, and calculates partial correlation values between the ID signals taken as much as the partial correlation length and the converted signals acquired in the signal converter, where the partial correlation length denotes a length of ID signals for partial correlation.

4. The apparatus of claim 1, wherein the ID signal generator includes:

a Kasami sequence generating unit for generating a Kasami sequence having a predetermined length; and

a sequence modulation unit for modulating the generated Kasami sequence through Binary Phase Shift Keying (BPSK).

5. The apparatus of claim 1, wherein the signal converter includes:

a down-converter for down-converting RF signals received in the receiver into signals of a desired band.

6. The apparatus of claim 5, wherein the signal converter includes further includes:

an analog-to-digital (AD) converter for converting analog signals acquired from the down-conversion in the down-converter into digital signals; and

a signal storage for storing the digital signals acquired in the analog-to-digital converter.

7. The apparatus of claim 1, wherein the signal converter includes further includes:

a down-converter for down-converting RF signals received in the receiver into signals of a desired band;

an analog-to-digital converter for converting analog signals acquired from the down-conversion in the down-converter into digital signals;

a modulator for modulating the digital signals acquired in the analog-to-digital converter into baseband signals; and

a baseband signal storage for storing the modulated digital signals acquired in the modulator.

8. A method for analyzing identification (ID) signals, comprising the steps of:

a) receiving signals with an ID signal added thereto;

b) converting the received signals into signals of a desired band;

c) generating ID signals that are identical to the ID signals added to the received signals;

d) calculating correlation values between the converted signals acquired from the signal conversion step b) and the created ID signals acquired in the ID signal generation step c) based on partial correlation; and

e) extracting channel profile from the correlation values acquired in the partial correlation step d).

9. The method of claim 8, wherein the partial correlation step d) includes:

d1) calculating partial correlation values between the converted signals and the created ID signals; and

d2) acquiring an accumulated average of the partial correlation values calculated in the step d1).

10. The method of claim 9, wherein, in the step d1), ID signals are taken as much as a partial correlation length from the generated ID signals acquired in the ID signal generator, and partial correlation values between the ID signals taken as much as the partial correlation length and the converted signals acquired in the signal converter are calculated, where the partial correlation length denotes a length of ID signals for partial correlation.

11. The method of claim 8, wherein the ID signal generation step c) includes:

c1) generating a Kasami sequence having a predetermined length; and

c2) modulating the generated Kasami sequence through Binary Phase Shift Keying (BPSK).