METHOD, DEVICE AND SYSTEM OF REDUCED PEAK-TO-AVERAGE-RATIO COMMUNICATION

• US 20090181628A1
• Filed: 01/10/2008
• Published: 07/16/2009
• Est. Priority Date: 01/10/2008
• Status: Active Grant

• Current Assignee: Amimon Limited (Vitec Group PLC)
• Original Assignee: Amimon Limited (Vitec Group PLC)
• Inventors: Ingber, Amir, Feder, Meir
• Granted Patent: US 8,116,695 B2
• Time in Patent Office: Days
• US Class Current: 455/127.100
• CPC Class Codes: H04L 27/2604 Multiresolution systems by means of multiresolution subcarriers H04L27/183, H04L27/3488
• CPC Class Codes: H04L 27/2614 Peak power aspects
• CPC Class Codes: H04L 27/3411 reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

Some embodiments include devices, methods and/or systems of reduced peak-to-average-ratio communication. An apparatus may include a transmitter to transmit a transmission corresponding to an input signal, wherein the transmitter may include a peak-to-average-ratio-reduction transformer to generate a plurality of transformed data components by applying a predefined peak-to-average-ratio-reduction transform scheme to a plurality of fine constellation data components corresponding to the input signal, wherein a peak-to-average-ratio corresponding to the plurality of transformed data components is lower than a peak-to-average-ratio corresponding to the plurality of fine-constellation data components; and a transmission module to generate the transmission based at least on the plurality of transformed data components. Other embodiments are described and claimed.

Claims

1. An apparatus comprising a transmitter to transmit a transmission corresponding to an input signal, said transmitter comprising:

a peak-to-average-ratio-reduction transformer to generate a plurality of transformed data components by applying a predefined peak-to-average-ratio-reduction transform scheme to a plurality of fine constellation data components corresponding to said input signal, wherein a peak-to-average-ratio corresponding to said plurality of transformed data components is lower than a peak-to-average-ratio corresponding to said plurality of fine-constellation data components; and

a transmission module to generate said transmission based at least on said plurality of transformed data components.

2. The apparatus of claim 1, wherein said input signal comprises a video signal, wherein said transmission comprises a wireless transmission corresponding to said video signal, and wherein said transmission module comprises a radio-frequency module.

3. The apparatus of claim 2, wherein said transmitter comprises a data-component mapper to map a plurality of data components representing said video signal into said plurality of fine-constellation data components and a plurality of coarse-constellation data components, wherein said transmission module is to generate said transmission based on said plurality of transformed data components and said plurality of coarse-constellation data components.

4. The apparatus of claim 3, wherein said peak-to-average-ratio-reduction transformer is to apply a predefined Hadamard transformation to said fine constellation data components.

5. The apparatus of claim 4, wherein said peak-to-average-ratio-reduction transformer is to multiply a block of a predefined number of said fine constellation data components by a predefined Hadamard transformation matrix.

6. The apparatus of claim 4, wherein said transmitter comprises a plurality of antennas to transmit said wireless transmission, and

wherein said radio-frequency module comprises a framer to construct a wireless transmission frame of said transmission by mapping said transformed data components to a plurality of sets of fine frequency bins, and to apply a predefined antenna-mapping transformation to at least one set of transformed data components, which are mapped to a common fine frequency bin.

7. The apparatus of claim 6, wherein said framer is to multiply said set of transformed data components by a Hadamard transformation matrix having a number of rows equal to a number of said plurality of antennas.

8. The apparatus of claim 6, wherein said peak-to-average-ratio-reduction transformer comprises:

a divider to divide said fine constellation data components into a plurality of streams, wherein a number of said plurality of streams is equal to a number of said plurality of antennas; and

a plurality of transformation modules to apply said transformation to said plurality of streams, respectively,

wherein each of said streams comprises fine constellation data components to be mapped by said framer to different fine frequency bins.

9. The apparatus of claim 3, wherein said transmitter comprises a coefficient generator to generate a plurality of transformation coefficients representing said video signal by applying a predefined coefficient-generation transformation to said video signal, and wherein said plurality of data components comprise said plurality of transformation coefficients.

10. The apparatus of claim 9, wherein said coefficient-generation transformation comprises a transformation from a spatial domain to a frequency domain.

11. The apparatus of claim 10, wherein said coefficient-generation transformation comprises a discrete-cosine-transform or a wavelet transformation.

12. The apparatus of claim 3 comprising a video source to generate said video signal.

13. A method of transmitting transmission corresponding to an input signal, said method comprising:

applying to a plurality of fine constellation data components corresponding to said input signal a predefined peak-to-average-ratio-reduction transform scheme to generate a plurality of transformed data components, wherein a peak-to-average-ratio corresponding to said plurality of transformed data components is lower than a peak-to-average-ratio corresponding to said plurality of fine-constellation data components; and

transmitting said transmission based at least on said plurality of transformed data components.

14. The method of claim 13, wherein said input signal comprises a video signal, and wherein said transmission comprises a wireless transmission corresponding to said video signal.

15. The method of claim 14 comprising mapping a plurality of data components representing said video signal into said plurality of fine-constellation data components and a plurality of coarse-constellation data components, wherein said transmitting comprises transmitting said wireless transmission based on said plurality of transformed data components and said plurality of coarse-constellation data components.

16. The method of claim 15, wherein said applying comprises applying a predefined Hadamard transformation to said fine constellation data components.

17. The method of claim 16, wherein applying said Hadamard transformation comprises multiplying a block of a predefined number of said fine constellation data components by a predefined Hadamard transformation matrix.

18. The method of claim 16, wherein transmitting said wireless transmission comprises transmitting said wireless transmission via a plurality of antennas, and wherein said method comprises:

constructing a wireless transmission frame of said transmission by mapping said transformed data components to a plurality of sets of fine frequency bins; and

applying a predefined antenna-mapping transformation to at least one set of transformed data components, which are mapped to a common fine frequency bin.

19. The method of claim 18, wherein applying said antenna-mapping transformation comprises multiplying said set of transformed data components by a Hadamard transformation matrix having a number of rows equal to a number of said plurality of antennas.

20. The method of claim 18, wherein applying said Hadamard transformation comprises:

dividing said fine constellation data components into a plurality of streams, wherein a number of said plurality of streams is equal to a number of said plurality of antennas; and

applying said Hadamard transformation to said plurality of streams, respectively, and

wherein each of said streams comprises fine constellation data components to be mapped to different fine frequency bins.

21. The method of claim 15 comprising applying a predefined coefficient-generation transformation to said video signal to generate a plurality of transformation coefficients representing said video, and wherein said plurality of data components comprise said plurality of transformation coefficients.

22. The method of claim 21, wherein said coefficient-generation transformation comprises a transformation from a spatial domain to a frequency domain.

23. A system comprising:

a wireless transmitter to transmit a wireless transmission corresponding to an input video signal, said transmitter comprising;

a data-component mapper to map a plurality of data components representing said video signal into a plurality of fine-constellation data components and a plurality of coarse-constellation data components;

a peak-to-average-ratio-reduction transformer to generate a plurality of transformed data components by applying to said plurality of fine constellation data components a predefined peak-to-average-ratio-reduction transform scheme, wherein a peak-to-average-ratio corresponding to said plurality of transformed data components is lower than a peak-to-average-ratio corresponding to said plurality of fine-constellation data components; and

a radio-frequency module to generate said wireless transmission based on said plurality of transformed data components and said plurality of coarse-constellation data components; and

a wireless receiver to receive said wireless transmission and to generate an output video signal corresponding to said wireless transmission.

24. The system of claim 23, wherein said peak-to-average-ratio-reduction transformer is to apply a predefined Hadamard transformation to said fine constellation data components.

25. The system of claim 24, wherein said peak-to-average-ratio-reduction transformer is to multiply a block of a predefined number of said fine constellation data components by a predefined Hadamard transformation matrix.

26. The system of claim 24, wherein said transmitter comprises a plurality of antennas to transmit said wireless transmission, and

wherein said radio-frequency module comprises a framer to construct a wireless transmission frame of said transmission by mapping said transformed data components to a plurality of sets of fine frequency bins, and to apply a predefined antenna-mapping transformation to at least one set of transformed data components, which are mapped to a common fine frequency bin.

27. The system of claim 23, wherein said transmitter comprises a coefficient generator to generate a plurality of transformation coefficients representing said video signal by applying a predefined coefficient-generation transformation to said video signal, and wherein said plurality of data components comprise said plurality of transformation coefficients.

28. The system of claim 23 comprising a video source to generate said input video signal.

29. The system of claim 23 comprising a video destination to display a video image based on said output video signal.

30. An apparatus comprising a transmitter to transmit a transmission corresponding to an input signal, said transmitter comprising:

a plurality of antennas to transmit said wireless transmission, and

a framer to construct a wireless transmission frame of said transmission by mapping a plurality of data components corresponding to said input signal to a plurality of sets frequency bins, each including a common frequency bin of said plurality of antennas; and

to apply a predefined antenna-mapping transformation to at least one set of said data components, which are mapped to a common frequency bin, to generate a set of transformed data components, wherein a peak-to-average-ratio corresponding to said set of transformed data components is lower than a peak-to-average-ratio corresponding to said set of data components.

31. The apparatus of claim 30, wherein said framer is to multiply said set of transformed data components by a Hadamard transformation matrix having a number of rows equal to a number of said plurality of antennas.