Wireless full-duplex transmission system

• US 20030189974A1
• Filed: 05/03/2001
• Published: 10/09/2003
• Est. Priority Date: 05/03/2001
• Status: Abandoned Application

• Current Assignee: BitRage, Inc.
• Original Assignee: BitRage, Inc.
• Inventors: Ferry, Chester
• Application Number:
  US09/847,581
• Publication Number:
  US 20030189974A1
• Time in Patent Office: Days
• US Class Current: 375/219
• CPC Class Codes: H04B 1/50 using different frequencies for the two directions of communication
• CPC Class Codes: H04B 1/52 Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
• CPC Class Codes: H04L 5/06 the signals being represented by different frequencies combined with time-division multiplexing H04L5/26

Abstract

A wireless transmission system and method for supporting the full-duplex transmission of baseband data within a single RF band, is presented herein. The system includes a modem that modulates the baseband data with a spectrally efficient modulation technique. The system also includes a transceiver that accommodates the wireless transmission of data within a first sub-band of frequencies derived from the single RF band and the wireless reception of data within a second sub-band of frequencies derived from the single RF band. The system further includes combline band-pass filters and a dual orthogonal feed antenna to ensure the isolation and separation between the first and second sub-bands.

Claims

1. A wireless transmission system for supporting the full-duplex transmission of data within a single frequency range, said wireless transmission system comprising:

a modem configured to modulate baseband data to generate modulated baseband data signals and to demodulate modulated baseband data signals into baseband data;

a transmit mechanism operatively coupled to said modem and configured to convert the modulated baseband data signals into transmit radio-frequency signals, wherein the transmit radio-frequency signals operate within a first sub-band of frequencies derived from the single frequency range and contain a carrier frequency centered in said first sub-band of frequencies;

a transmit radio-frequency band-pass filter operatively coupled to said transmit mechanism and configured to filter the transmit radio-frequency signals within said first sub-band of frequencies, said transmit radio-frequency band-pass filter comprising a narrowband filter having response characteristics that substantially reject signals outside said first sub-band of frequencies;

an antenna mechanism operatively coupled to said transmit radio-frequency band-pass filter and configured to radiate the transmit radio-frequency signals and to collect receive radio-frequency signals;

a receive mechanism coupled to said modem and configured to convert the receive radio-frequency signals into modulated baseband data signals, wherein the receive radio-frequency signals operate within a second sub-band of frequencies derived from the single frequency range and contain a carrier frequency centered in said second sub-band of frequencies; and

a receive radio-frequency band-pass filter operatively coupled to said receive mechanism and said antenna mechanism and configured to filter the receive radio-frequency signals within said second sub-band of frequencies, said receive radio-frequency band-pass filter comprising a narrowband filter having response characteristics that substantially reject signals outside said second sub-band of frequencies.

2. The wireless transmission system of claim 1, wherein said antenna mechanism comprises a dual orthogonal feed antenna configured to transmit said transmit radio-frequency signals in accordance with a first polarization orientation and receive said receive radio-frequency signals in accordance with a second polarization orientation, such that said first polarization orientation is orthogonal to said second polarization orientation.

3. The wireless transmission system of claim 1, further comprising a network interface device operatively coupled to said modem and configured to supply baseband data to, and receive baseband data from, said modem.

4. The wireless transmission system of claim 2, wherein at least one of said transmit and receive radio-frequency band-pass filter comprises a combline filter.

5. The wireless transmission system of claim 3, wherein said modem modulates the baseband data in accordance with QAM modulation techniques.

6. The wireless transmission system of claim 5, wherein said transmit mechanism includes,

a modulating mechanism which converts said modulated baseband signals into transmit intermediate-frequency signals,

an up-converting circuit configured to convert said transmit intermediate frequency signals into said transmit radio-frequency signals, and

a power amplifier configured to amplify said transmit radio-frequency signals.

7. The wireless transmission system of claim 6, wherein said receive mechanism includes,

a low-noise amplifier configured to amplify said receive radio-frequency signals,

a down-converting circuit configured to convert said amplified receive radio-frequency signals into receive intermediate frequency signals, and

a demodulating mechanism which converts said receive intermediate frequency signals into said modulated baseband signals.

8. The wireless transmission system of claim 7, further comprising a transceiver, wherein said transmit mechanism and said receive mechanism are incorporated in said transceiver.

9. The wireless transmission system of claim 7, wherein said first sub-band of frequencies comprises 5.725-5.775 GHz and the transmit radio-frequency signals operate with a carrier frequency of 5.750 GHz.

10. The wireless transmission system of claim 9, wherein said second sub-band of frequencies comprises 5.775-5.825 GHz and the receive radio-frequency signals operate with a carrier frequency of 5.800 GHz.

11. A wireless transmission system for supporting the full-duplex transmission of data within a single frequency range, said wireless transmission system comprising:

a transmit radio-frequency band-pass filter configured to filter transmit radio-frequency signals within a first sub-band of frequencies derived from the single frequency range, said transmit radio-frequency band-pass filter comprising a narrowband filter having response characteristics that substantially reject signals outside said first sub-band of frequencies;

a receive radio-frequency band-pass filter configured to filter receive radio-frequency signals within a second sub-band of frequencies derived from the single frequency range, said receive radio-frequency band-pass filter comprising a narrowband filter having response characteristics that substantially reject signals outside said second sub-band of frequencies; and

an antenna mechanism operatively coupled to at least one of said transmit and receive radio-frequency band-pass filters and configured to radiate the transmit radio-frequency signals and to collect receive radio-frequency signals,

wherein said antenna mechanism includes a dual orthogonal feed configuration capable of radiating said transmit radio-frequency signals in accordance with a first polarization orientation and collecting said receive radio-frequency signals in accordance with a second polarization orientation, such that said first polarization orientation is orthogonal to said second polarization orientation.

12. The wireless transmission system of claim 11, further including a modem configured to modulate baseband data to generate modulated baseband data signals and to demodulate modulated baseband data signals into baseband data.

13. The wireless transmission system of claim 12, further including a transmit mechanism operatively coupled to said modem and configured to convert the modulated baseband data signals into the transmit radio-frequency signals, wherein the transmit radio-frequency signals operate within said first sub-band of frequencies and contain a carrier frequency centered in said first sub-band of frequencies.

14. The wireless transmission system of claim 13, further including a receive mechanism coupled to said modem and configured to convert the receive radio-frequency signals into modulated baseband data signals, wherein the receive radio-frequency signals operate within said second sub-band of frequencies and contain a carrier frequency centered in said second sub-band of frequencies.

15. The wireless transmission system of claim 14, further comprising a network interface device operatively coupled to said modem and configured to supply baseband data to, and receive baseband data from, said modem.

16. The wireless transmission system of claim 15, wherein at least one of said transmit and receive radio-frequency band-pass filter comprises a combline filter.

17. The wireless transmission system of claim 12, wherein said modem modulates the baseband data in accordance with QAM modulation techniques.

18. The wireless transmission system of claim 13, wherein said transmit mechanism includes,

a modulating mechanism which converts said modulated baseband signals into transmit intermediate-frequency signals,

an up-converting circuit configured to convert said transmit intermediate frequency signals into said transmit radio-frequency signals, and

a power amplifier configured to amplify said transmit radio-frequency signals.

19. The wireless transmission system of claim 14, wherein said receive mechanism includes,

a low-noise amplifier configured to amplify said receive radio-frequency signals,

a down-converting circuit configured to convert said amplified receive radio-frequency signals into receive intermediate frequency signals, and

a demodulating mechanism which converts said receive intermediate frequency signals into said modulated baseband signals.

20. The wireless transmission system of claim 14, further comprising a transceiver, wherein said transmit mechanism and said receive mechanism are incorporated in said transceiver.

21. The wireless transmission system of claim 11, wherein said first sub-band of frequencies comprises 5.725-5.775 GHz and the transmit radio-frequency signals operate with a carrier frequency of 5.750 GHz.

22. The wireless transmission system of claim 11, wherein said second sub-band of frequencies comprises 5.775-5.825 GHz and the receive radio-frequency signals operate with a carrier frequency of 5.800 GHz.