Simulcasting MIMO communication system

• US 9,543,992 B2
• Filed: 04/21/2014
• Issued: 01/10/2017
• Est. Priority Date: 08/22/2001
• Status: Expired due to Term

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Li, Ye, Sollenberger, Nelson Ray, Winters, Jack Harriman
• Primary Examiner(s): Elallam, Ahmed
• Application Number:
  US14/257,701
• Publication Number:
  US 20140226618A1
• Time in Patent Office: 995 Days
• Field of Search: 370/208, 370/210, 370/242, 370/291, 370/328, 370/342, 370/343, 370/344, 370/345, 370/347, 370/365, 370/480, 370/503, 455/63.1, 455/501, 455/503, 455/562.1
• US Class Current: 1/1
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A wireless multiple-input multiple output (MIMO) communication system includes signaling simulcasting. Base stations include a plurality of transmit antennas and terminals include a plurality of receive antennas to form MIMO channels. In one embodiment, a simulcasting MIMO wireless communication system includes orthogonal frequency division multiplexing (OFDM). This arrangement achieves the spectral efficiency advantages of OFDM and simulcasting.

Claims

1. A method for wireless communication, the method comprising:

transmitting a first signal from a first transmit antenna associated with a first multiple-input multiple-output transmitting station, wherein the transmitting the first signal is performed by utilizing orthogonal frequency division multiplexing; and

transmitting a second signal from a second transmit antenna associated with the first multiple-input multiple-output transmitting station, wherein the transmitting the second signal is performed by utilizing the orthogonal frequency division multiplexing, wherein the first signal and the second signal are transmitted while the first signal is transmitted from a first transmit antenna associated with a second multiple-input multiple-output transmitting station, and while the second signal is transmitted from a second transmit antenna associated with the second multiple-input multiple-output transmitting station, where the first signal transmitted from both the first multiple-input multiple-output transmitting station and the second multiple-input multiple-output transmitting station is simulcast in a first same frequency, where the second signal transmitted from both the first multiple-input multiple-output transmitting station and the second multiple-input multiple-output transmitting station is simulcast in a second same frequency.

2. The method of claim 1, further comprising:

receiving the first signal and the second signal on a first antenna associated with a first terminal; and

receiving the first signal and the second signal on a second antenna associated with the first terminal.

3. The method of claim 1, wherein the first multiple-input multiple-output transmitting station and the second multiple-input multiple-output transmitting station are part of a wireless cellular system.

4. The method of claim 1, wherein the first signal is simulcasted for a high demand channel.

5. The method of claim 4, wherein the high demand channel is for providing stock quotes.

6. The method of claim 1, wherein the first multiple-input multiple-output transmitting station and the second multiple-input multiple-output transmitting station are deployed in a building.

7. The method of claim 1, wherein the first multiple-input multiple-output transmitting station is deployed in a first building and the second multiple-input multiple-output transmitting station is deployed in a second building.

8. The method of claim 1, wherein the orthogonal frequency division multiplexing utilizes overlapping orthogonal multicarrier modulation.

9. The method of claim 8, wherein the overlapping orthogonal multicarrier modulation comprises a plurality of subcarriers.

10. The method of claim 1, wherein the second signal is simulcasted for a high demand channel.

11. A method for wireless communication, the method comprising:

simulcasting a first signal and a second signal from a plurality of multiple-input multiple-output base stations; and

non-simulcasting at least one other signal from the plurality of multiple-input multiple-output base stations, wherein the simulcasting the first signal comprises transmitting the first signal in a first same frequency, wherein the simulcasting the second signal comprises transmitting the second signal in a second same frequency, wherein orthogonal frequency division multiplexing is utilized to transmit the first signal and the second signal that are simulcast and the at least one other signal that is non-simulcast.

12. The method of claim 11, wherein the plurality of multiple-input multiple-output base stations is part of a wireless cellular system.

13. The method of claim 11, wherein the simulcasting the first signal comprises simulcasting the first signal for a high demand channel.

14. The method of claim 13, wherein the high demand channel is for providing stock quotes.

15. The method of claim 11, wherein the plurality of multiple-input multiple-output base stations is deployed in a building.

16. The method of claim 11, wherein the plurality of multiple-input multiple-output base stations is deployed in a plurality of buildings.

17. A wireless communication system, comprising:

a terminal comprising a plurality of receive antennas for receiving a plurality of transmitted signals, wherein each of the plurality of transmitted signals is transmitted via a respective one of a plurality of transmit antennas included in a respective one of a plurality of multiple-input multiple-output base stations, wherein the plurality of multiple-input multiple-output base stations simulcasts a first signal from the plurality of transmit antennas in a first same frequency, wherein the plurality of multiple-input multiple-output base stations simulcasts a second signal from the plurality of transmit antennas in a second same frequency, wherein the plurality of transmitted signals is transmitted utilizing orthogonal frequency division multiplexing.

18. The wireless communication system of claim 17, wherein the terminal is a mobile phone.

19. The wireless communication system of claim 17, wherein the wireless communication system is a wireless telephone network.

20. The wireless communication system of claim 17, wherein the terminal comprises a mobile station.