Multi-connection, non-simultaneous frequency diversity in radio communication systems

• US 7,680,470 B2
• Filed: 07/20/2007
• Issued: 03/16/2010
• Est. Priority Date: 07/19/2004
• Status: Active Grant

• Current Assignee: Aviat U.S., Inc. (Aviat Networks Incorporated)
• Original Assignee: PureWave Networks
• Inventors: Leabman, Michael
• Primary Examiner(s): NGUYEN, SIMON
• Application Number:
  US11/878,055
• Publication Number:
  US 20070264944A1
• Time in Patent Office: 970 Days
• Field of Search: 455504-506, 455/101, 455103-104, 455/132, 455/137, 375/267, 375/299, 375/347
• US Class Current: 455/130
• CPC Class Codes: H04B 7/0667 of delayed versions of same signal using space-time coding H04L1/0618
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04L 27/2602 Signal structure

Abstract

A radio communication system includes a remote device radio, and a base station radio operable to communicate with the remote device radio at a first channel and at a second channel using non-simultaneous frequency diversity. The base station is operable to communicate with a device other than the remote device at the second channel while the remote device radio and the base station radio are communicating at the first channel. A radio using non-simultaneous frequency diversity includes an antenna, a radio frequency module coupled to the antenna such that the radio frequency module is operable to transmit or receive radio frequency signals at a first channel and signals at a second channel using the antenna, and a baseband module coupled to the radio frequency module. The baseband module operable to transmit or receive signals through the radio frequency module, such that signals transmitted or received by the radio employ non-simultaneous frequency diversity using the first channel and the second channel. Additional devices are operable to use the second channel while the radio is transmitting or receiving radio frequency signals at the first channel.

Claims

1. A method for receiving information transmitted using non-simultaneous frequency diversity comprising:

receiving a first signal transmitted by a first device on a first radio frequency channel while simultaneously communicating with a second device on a second radio frequency channel;

after a predetermined amount of time, receiving a second signal transmitted by the first device on the second radio frequency channel; and

identifying transmitted information based on the first signal and the second signal,

wherein the first radio frequency channel and the second radio frequency channel are at least partially non-overlapping so as to enable reception of information transmitted using non-simultaneous frequency diversity.

2. The method of claim 1 further comprising converting the first signal to an intermediate frequency using a signal from a local oscillator.

3. The method of claim 2 further comprising converting the second signal to an intermediate frequency using a signal from a local oscillator.

4. The method of claim 3 wherein the same local oscillator is used to convert the first signal to an intermediate frequency and to convert the second signal to an intermediate frequency.

5. The method of claim 1 wherein the predetermined amount of time is fixed.

6. The method of claim 1 wherein a single receive path is used to receive the first signal transmitted on the first radio frequency channel and to receive the second signal transmitted on a second radio frequency channel.

7. The method of claim 1 wherein the first radio frequency channel and the second radio frequency channel are wideband channels.

8. The method of claim 1 wherein the first radio frequency channel and the second radio frequency channel differ by at least 20 MHz.

9. The method of claim 1 wherein identifying transmitted information based on the first signal and the second signal includes combining the first signal and the second signal using selection diversity.

10. The method of claim 1 wherein identifying transmitted information based on the first signal and the second signal includes combining the first signal and the second signal using equal gain combining.

11. The method of claim 1 wherein identifying transmitted information based on the first signal and the second signal includes combining the first signal and the second signal using maximal ratio combining.

12. A method for receiving information transmitted using non-simultaneous frequency diversity comprising:

receiving a first signal transmitted by a first device on a first radio frequency channel while a second device communicates with the first device on a second radio frequency channel;

after a predetermined amount of time, receiving a second signal transmitted by the first device on the second radio frequency channel; and

identifying transmitted information based on the first signal and the second signal,

wherein the first radio frequency channel and the second radio frequency channel are at least partially non-overlapping so as to enable reception of information transmitted using non-simultaneous frequency diversity.

13. The method of claim 12 wherein the first device is a base station.

14. The method of claim 13 wherein the first signal transmitted by a first device is received while the second device communicates with the first device.