Method and apparatus for transmitting wireline single-band orthogonal frequency division mutiplexing based ultra wideband signal over pipeline carrying CATV broadcasting signal

Abstract

A method and an apparatus for transmitting a single-band orthogonal frequency division multiplexing (OFDM)-based ultra wideband (UWB) signal over a pipeline carrying a cable television broadcasting signal. The method includes transforming a multimedia signal transmitted from a multimedia device into a wireline UWB signal; transforming the wireline UWB signal into a single-band OFDM signal; and frequency-spreading the single-band OFDM signal according to a transmission rate. Thus, the apparatus can be robust to multi-path interference and extend transmission distance so as to increase transmission efficiency.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or other aspects of the present invention will be more apparent by describing certain exemplary embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a graph illustrating a spectrum of an UWB signal;

FIG. 2 is a graph illustrating a frequency response with respect to a transmission attenuation characteristic of a coaxial cable;

FIG. 3 is a graph illustrating a transmission characteristic of an RF splitter;

FIG. 4 is a view illustrating a wireline UWB signal transmission system adopting an UWB signal transmission apparatus according to an exemplary embodiment of the present invention;

FIG. 5 is a block diagram of an UWB signal transmission apparatus according to an exemplary embodiment of the present invention;

FIG. 6 is a view illustrating a frequency spread according to an exemplary embodiment of the present invention;

FIG. 7 is a flowchart of a method of transmitting an UWB signal according to an exemplary embodiment of the present invention; and

FIG. 8 is a graph illustrating a performance of a method of transmitting an UWB signal according to an exemplary embodiment of the present invention.

Claims

1. A method of transmitting an ultra wideband (UWB) signal, the method comprising: transforming a multimedia signal transmitted from a multimedia device into a wireline UWB signal;transforming the wireline UWB signal into a single-band orthogonal frequency division multiplexing (OFDM) signal; andfrequency-spreading the single-band OFDM signal according to a transmission rate.

2. The method of claim 1, wherein when the single-band OFDM signal is frequency-spread, a frequency spread coefficient used in the frequency-spreading varies according to the transmission rate.

3. The method of claim 1, wherein the single-band OFDM signal is frequency-spread in a frequency band between 0.9 GHz and 1.6 GHz.

4. The method of claim 1, further comprising coupling cable TV broadcasting signal to the frequency-spread single-band OFDM signal.

5. The method of claim 1, the transmission rate is 100 Mbps or more.

6. An apparatus for transmitting an ultra wideband (UWB) signal, comprising: a signal transformer which transforms a multimedia signal transmitted from a multimedia device into a wireline UWB signal;a single-band orthogonal frequency division multiplexing (OFDM) generator which transforms the wireline UWB signal into a single-band OFDM signal; anda frequency spreader which frequency-spreads the single-band OFDM signal according to a transmission rate.

7. The apparatus of claim 6, wherein the frequency spreader varies a frequency spread coefficient used in the frequency-spreading according to the transmission rate.

8. The apparatus of claim 6, wherein the frequency spreader frequency-spreads the single-band OFDM signal in a frequency band between 0.9 GHz and 1.6 GHz.

9. The apparatus of claim 6, further comprising a signal coupler and splitter which couples a cable television broadcasting signal to the frequency-spread single-band OFDM signal.

10. The apparatus of claim 6, the transmission rate is 100 Mbps or more.

11. The apparatus of claim 6, the signal-transformer is configured to intertransform the multimedia signal and the wireline UWB signal.

12. An apparatus for transmitting an ultra wideband (UWB) signal, the apparatus comprising: a module which transforms a multimedia signal transmitted from a multimedia device into a wireline UWB signal;a module which transforms the wireline UWB signal into a single-band orthogonal frequency division multiplexing (OFDM) signal; anda module which frequency-spreads the single-band OFDM signal according to a transmission rate.

13. The apparatus of claim 12, wherein the module, which frequency-spreads the single-band OFDM signal according to the transmission rate, varies a frequency spread coefficient used in the frequency-spreading according to the transmission rate.

14. The apparatus of claim 12, wherein the module, which frequency-spreads the single-band OFDM signal according to the transmission rate, frequency-spreads the single-band OFDM signal in a frequency band between 0.9 GHz and 1.6 GHz.

15. The apparatus of claim 12, further comprising a module which couples a cable television broadcasting signal to the frequency-spread single-band OFDM signal.

16. The apparatus of claim 12, the transmission rate is 100 Mbps or more.

17. The apparatus of claim 12, the module, which transforms the multimedia signal transmitted from the multimedia device into the wireline UWB signal, is configured to intertransform the multimedia signal and the wireline UWB signal.

18. A system for transmitting an ultra wideband (UWB) signal, comprising: a coaxial cable which transmits a cable television (CATV) broadcasting signal;a splitter which is connected to the coaxial cable and splits the CATV broadcasting signal in a predetermined ratio; andan UWB signal transmission apparatus which is connected to the splitter and transmits a frequency-spread UWB signal to the splitter.

19. The system of claim 18, wherein the UWB signal transmission apparatus comprising: a signal transformer which transforms a multimedia signal transmitted from a multimedia device into a wireline UWB signal;a single-band orthogonal frequency division multiplexing (OFDM) generator which transforms the wireline UWB signal into a single-band OFDM signal; anda frequency spreader which frequency-spreads the single-band OFDM signal according to a transmission rate.

20. The apparatus of claim 19, wherein the frequency spreader varies a frequency spread coefficient used in the frequency-spreading according to the transmission rate.

21. The apparatus of claim 19, wherein the frequency spreader frequency-spreads the single-band OFDM signal in a frequency band between 0.9 GHz and 1.6 GHz.

22. The apparatus of claim 19, further comprising a signal coupler and splitter which couples the CATV broadcasting signal to the frequency-spread single-band OFDM signal.

23. The apparatus of claim 19, the transmission rate is 100 Mbps or more.

24. The apparatus of claim 19, the signal-transformer is configured to intertransform the multimedia signal and the wireline UWB signal.