SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, RECEIVING DEVICE, AND RECEIVING METHOD

• US 20150146825A1
• Filed: 05/22/2013
• Published: 05/28/2015
• Est. Priority Date: 05/31/2012
• Status: Active Grant

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kamata, Hiroyuki, Kawauchi, Hidetoshi, Yoshimochi, Naoki, Kobayashi, Kenichi, Takanohashi, Kazukuni
• Granted Patent: US 9,306,787 B2
• Time in Patent Office: Days
• US Class Current: 375/340
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 27/26524 Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2671 Time domain
• CPC Class Codes: H04L 7/0033 Correction by delay

Abstract

There is provided a signal processing device including a first correction processing section that performs first correction on a predetermined signal, an adaptive processing section that performs predetermined adaptive processing on the signal that has been subjected to the first correction, and a second correction processing section that performs second correction, which is reverse correction of the first correction, on the signal that has been subjected to the adaptive processing, in accordance with the amount of delay in the adaptive processing.

Claims

1. A signal processing device comprising:

a first correction processing section that performs first correction on a predetermined signal;

an adaptive processing section that performs predetermined adaptive processing on the signal that has been subjected to the first correction; and

a second correction processing section that performs second correction, which is reverse correction of the first correction, on the signal that has been subjected to the adaptive processing, in accordance with the amount of delay in the adaptive processing.

2. The signal processing device according to claim 1, wherein

the first correction processing section, the adaptive processing section, and the second correction processing section are disposed in an identical feedback loop, and

the amount of delay in the feedback loop is adjusted according to an adaptation state in the adaptive processing.

3. The signal processing device according to claim 2, further comprising

one or more processing sections each of which performs predetermined signal processing,

wherein the processing sections are disposed in the feedback loop.

4. The signal processing device according to claim 3, wherein

in a case where the adaptive processing does not include manipulation processing of the signal, the amount of delay in the feedback loop is shortened as compared with a case where the adaptive processing includes the manipulation processing of the signal.

5. A signal processing method performed by a signal processing device, the method comprising the steps of:

performing first correction on a predetermined signal;

performing predetermined adaptive processing on the signal that has been subjected to the first correction, and

performing second correction, which is reverse correction of the first correction, on the signal that has been subjected to the adaptive processing, in accordance with the amount of delay in the adaptive processing.

6. A receiving device comprising:

a first correction processing section that performs first frequency correction on an orthogonal frequency division multiplexing (OFDM) signal;

a time domain adaptive processing section that performs time domain adaptive processing, which is adaptive processing in a time domain, on the OFDM signal that has been subjected to the first frequency correction; and

a second correction processing section that performs second frequency correction, which is reverse correction of the first frequency correction, on the OFDM signal that has been subjected to the time domain adaptive processing, in accordance with the amount of delay in the time domain adaptive processing.

7. The receiving device according to claim 6, wherein

the first correction processing section, the time domain adaptive processing section, and the second correction processing section are disposed in an identical feedback loop, and

the amount of delay in the feedback loop is adjusted according to an adaptation state in the time domain adaptive processing.

8. The receiving device according to claim 7, further comprising:

an FFT calculating section that converts the OFDM signal that has been subjected to the second correction processing from a time domain into a frequency domain;

a frequency-domain frequency-error detecting section that detects a frequency error in the frequency domain contained in the OFDM signal; and

a frequency correcting value generating section that generates a frequency correcting value in accordance with the detected frequency error, wherein

the FFT calculating section, the frequency-domain frequency-error detecting section, and the frequency correcting value generating section are disposed in the feedback loop, and

the first correction processing section performs the first frequency correction on the basis of the generated frequency correcting value.

9. The receiving device according to claim 8, wherein

in a case where the time domain adaptive processing does not include the adaptive processing in the time domain on the OFDM signal, the amount of delay in the feedback loop is shortened as compared with a case where the time domain adaptive processing includes the adaptive processing in the time domain on the OFDM signal.

10. A receiving method performed by a receiving device, the method comprising the steps of:

performing first frequency correction on an OFDM signal;

performing time domain adaptive processing, which is adaptive processing in a time domain on the OFDM signal that has been subjected to the first frequency correction; and

performing second frequency correction, which is reverse correction of the first frequency correction, on the OFDM signal that has been subjected to the time domain adaptive processing, in accordance with the amount of delay in the time domain adaptive processing.