Apparatus and method for providing a beacon signal in a wireless communication system

• US 5,805,575 A
• Filed: 08/19/1996
• Issued: 09/08/1998
• Est. Priority Date: 08/19/1996
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kamin, Ralph A. Jr.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US08/697,107
• Time in Patent Office: 750 Days
• Field of Search: 370/335, 370/334, 370/331, 370/336, 370/527, 370/320, 370/342, 370/441, 370/479, 342/373, 342/354, 455/422, 455/436
• US Class Current: 370/335
• CPC Class Codes: H01Q 3/22 varying the orientation in accordance with variation of frequency of radiated wave
• CPC Class Codes: H01Q 3/40 with phasing matrix
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

A beacon signal (313) is provided in a wireless communication system using a hybrid matrix (303) and an inverse hybrid matrix (306). Using an unused port of the hybrid matrix (303), the beacon signal (313) is combined with traffic signals (316) intended for users of the wireless communication system. The hybrid matrix (303) transforms beacon signal (313) and the traffic signals (316) into output signals that each contain a portion of the beacon signal (313) and the traffic signals (316). The outputs from the hybrid matrix (303) are amplified by amplifiers (315). The outputs from the amplifiers (315) are then inverse transformed by an inverse hybrid matrix (306). The inverse transform matrix (306) recombines the portions of the beacon signal (313) and the traffic signals (316) originally input to the hybrid matrix (303), and the resulting signals are transmitted using sector antennas (320) and a beacon antenna (323).

Claims

1. An apparatus for providing a beacon signal in a wireless communication system, the apparatus comprising:

a beacon signal generator for providing the beacon signal;

a hybrid matrix having as an input the beacon signal and at least one traffic signal, the hybrid matrix having a plurality of output signals;

a plurality of amplifiers having as inputs the corresponding plurality of output signals from the hybrid matrix and having as an output a plurality of amplified output signals; and

an inverse hybrid matrix, having as inputs the plurality of amplified output signals and outputting the traffic signal and the beacon signal to a mobile station.

2. The apparatus of claim 1, wherein the hybrid matrix further comprises a Fourier Transform Matrix or a Butler Transform Matrix.

3. The apparatus of claim 1, wherein the beacon signal is input into an unused port of the hybrid matrix.

4. The apparatus of claim 1, wherein the beacon signal provides the mobile station communicating on a first communication system handoff information related to a second communication system.

5. The apparatus of claim 4, wherein the first communication system further comprises a code division multiple access (CDMA) cellular communication system.

6. The apparatus of claim 5, wherein the traffic signal further comprises a voice/data signal processed to be compatible with the CDMA cellular communication system.

7. The apparatus of claim 4, wherein the second communication system further comprises either a CDMA cellular communication system or an analog cellular communication system.

8. An apparatus for providing a beacon signal in a wireless communication system, the apparatus comprising:

a beacon signal generator for providing the beacon signal;

transform means, having as input the beacon signal and at least one traffic signal, for transforming the beacon signal and the at least one traffic signal into at least a first and a second transformed signals;

a plurality of amplifying means for amplifying the first and second transformed signals; and

inverse transform means for transforming said first and second transformed signals received from the plurality of amplifying means into the beacon signal and the at least one traffic signal originally input into the transform means.

9. The apparatus of claim 8, wherein the wireless communication system is a code division multiple access (CDMA) communication system.

10. The apparatus of claim 8, wherein the transform means and the inverse transform means further comprise either a Fourier Transform Matrix or a Butler Transform Matrix.

11. The apparatus of claim 8, wherein the first and second transformed signals each have components of the beacon signal and the at least one traffic signal thereon.

12. The apparatus of claim 8, wherein each of the plurality of amplifying means further comprise a single-tone wideband linear power amplifier.

13. The apparatus of claim 8, wherein the transform means further having as inputs the beacon signal and at least three traffic signals intended for users located in three sectors of the wireless communication system.

14. A method of providing a beacon signal in a wireless communication system, the method comprising the steps of:

generating the beacon signal to be provided;

transforming the beacon signal and at least one traffic signal into at least a first and a second transformed signals;

amplifying the first and second transformed signals; and

transforming said first and second transformed signals received from the plurality of amplifying means into the beacon signal and the at least one traffic signal originally input into the transform means.

15. The method of claim 14, wherein the wireless communication system further comprises a code division multiple access (CDMA) cellular communication system.

16. The method of claim 15, wherein the at least one traffic signal is a voice/data signal processed to be compatible with the CDMA cellular communication system.

17. The method of claim 14, wherein the wireless communication system further comprises a first wireless communication system.

18. The method of claim 17, wherein the beacon signal provides the mobile station communicating on the first wireless communication system with handoff information related to a second wireless communication system.