Waveform differentiating repeater

• US 9,008,156 B1
• Filed: 05/01/2014
• Issued: 04/14/2015
• Est. Priority Date: 05/01/2014
• Status: Active Grant

• Current Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Original Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Inventors: Dick, Christopher H.
• Primary Examiner(s): WANG, TED M
• Application Number:
  US14/267,846
• Time in Patent Office: 348 Days
• Field of Search: 375/211, 375/219, 375/220, 375/222
• US Class Current: 375/211
• CPC Class Codes: H03F 1/3247 using feedback acting on predistortion circuits H03F1/3264 takes precedence
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 25/03828 Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties partial response systems H04L25/497
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

An apparatus relates generally to a repeater. In such an apparatus, the repeater has a signal analysis and classification block. The signal analysis and classification block includes a signal analysis block and a classification block. The signal analysis block is coupled to receive a digital signal which is a digital version of an input signal received by the repeater. The signal analysis block is coupled to provide signal information regarding the digital signal to the classification block. The classification block is configured to provide classification information to classify the digital signal using the signal information provided as being a waveform type of a group of waveform types.

Claims

1. An apparatus, comprising:

a repeater having a signal analysis and classification block;

wherein the signal analysis and classification block comprises a signal analysis block and a classification block;

wherein the signal analysis block is coupled to receive a digital signal which is a digital version of an input signal received by the repeater;

wherein the signal analysis block is coupled to provide signal information regarding the digital signal to the classification block;

wherein the classification block is configured to provide classification information to classify the digital signal using the signal information provided as being a waveform type of a group of waveform types;

wherein the repeater has a digital up converter coupled to the signal analysis block; and

wherein the signal analysis block is coupled to provide a decomposed signal of the digital signal to the digital up converter.

2. The apparatus according to claim 1, wherein the signal information includes occupancy information of a band of the digital signal.

3. The apparatus according to claim 1, wherein the signal information includes a center frequency of the digital signal.

4. The apparatus according to claim 1, wherein the signal information includes a bandwidth of the digital signal.

5. The apparatus according to claim 1, wherein the signal information includes a carrier frequency of the digital signal.

6. The apparatus according to claim 1, wherein the signal information includes a channel spacing of the digital signal.

7. The apparatus according to claim 1, wherein:

the repeater has a crest factor reduction block and a digital pre-distortion block;

the signal analysis block is a spectral analysis block;

the crest factor reduction block is coupled to the digital up converter to receive therefrom a recomposed signal based on an up-converted version of the decomposed signal; and

the digital pre-distortion block is coupled to the crest factor reduction block to receive therefrom a crest factor reduced version of the recomposed signal.

8. The apparatus according to claim 7, wherein the classification block is coupled to the crest factor reduction block to provide thereto the classification information to select crest factor reduction parametric input for the waveform type for use by the crest factor reduction block.

9. The apparatus according to claim 7, wherein the classification block is coupled to the digital pre-distortion block to provide thereto the classification information to select digital pre-distortion parametric input for the waveform type for use by the digital pre-distortion block.

10. The apparatus according to claim 7, wherein the classification information includes cyclostationary-based information.

11. The apparatus according to claim 1, wherein the cyclostationary-based information is selected from a group consisting of cyclic autocorrelation information, cycle frequencies, and symbol timing recovery information.

12. The apparatus according to claim 10, wherein:

the repeater has a processor-based hardware accelerator coupled to the classification block to receive the cyclostationary-based information; and

the processor-based hardware accelerator is configured to generate parametric input for the waveform type responsive to the cyclostationary-based information.

13. The apparatus according to claim 10, wherein the processor-based hardware accelerator is coupled to the crest factor reduction block to provide thereto crest factor reduction information for the parametric input.

14. The apparatus according to claim 12, wherein the processor-based hardware accelerator is coupled to the digital pre-distortion block to provide thereto digital pre-distortion information for the parametric input.

15. The apparatus according to claim 12, wherein the group of waveform types consists of orthogonal frequency division multiplexed signals, spread spectrum signals, frequency hopping band signals, static narrow band signals, and combinations thereof.

16. A method, comprising:

receiving an input signal by a repeater;

wherein the repeater comprises an input processing chain coupled to a signal analysis and classification block;

wherein the signal analysis and classification block comprises a signal analysis block and a classification block;

converting the input signal to a digital signal with the input processing chain;

receiving by the signal analysis block the digital signal;

providing signal information regarding the digital signal from the signal analysis block to the classification block;

generating classification information with the classification block to classify the digital signal using the signal information provided as being a waveform type selected from of a group of waveform types; and

providing a decomposed signal of the digital signal from the signal analysis block to a digital up converter of the repeater.

17. The method according to claim 16, further comprising:

reconstituting the decomposed signal with the digital up converter to provide a recomposed signal;

crest factor reducing the recomposed signal with a crest factor reduction block of the repeater to provide a crest factor reduced signal;

distorting the crest factor reduced signal with a digital pre-distortion block of the repeater to provide a digitally pre-distorted signal;

providing a first portion of the classification information from the classification block to the crest factor reduction block to select crest factor reduction parametric input for the waveform type; and

providing a second portion of the classification information from the classification block to the digital pre-distortion block to select digital pre-distortion parametric input for the waveform type.

18. The method according to claim 16, further comprising:

reconstituting the decomposed signal with the digital up converter to provide a recomposed signal;

crest factor reducing the recomposed signal with a crest factor reduction block of the repeater to provide a crest factor reduced signal;

distorting the crest factor reduced signal with a digital pre-distortion block of the repeater to provide a digitally pre-distorted signal;

providing the classification information from the classification block to a processor-based hardware accelerator of the repeater;

generating parametric input for the waveform type responsive to the classification information with the processor-based hardware accelerator; and

providing the parametric input from the processor-based hardware accelerator to the crest factor reduction block as crest factor reduction information.

19. The method according to claim 16, further comprising:

reconstituting the decomposed signal with the digital up converter to provide a recomposed signal;

crest factor reducing the recomposed signal with a crest factor reduction block of the repeater to provide a crest factor reduced signal;

distorting the crest factor reduced signal with a digital pre-distortion block of the repeater to provide a digitally pre-distorted signal;

providing the classification information from the classification block to a processor-based hardware accelerator of the repeater;

generating parametric input for the waveform type responsive to the classification information with the processor-based hardware accelerator; and

providing the parametric input from the processor-based hardware accelerator to the digital pre-distortion block as digital pre-distortion information.