Communication within buildings

• US 7,426,231 B1
• Filed: 08/19/2002
• Issued: 09/16/2008
• Est. Priority Date: 06/19/2000
• Status: Expired due to Fees

• Current Assignee: Bertrand Dorfman
• Original Assignee: Bertrand Dorfman
• Inventors: Dorfman, Bertrand
• Primary Examiner(s): Ghayour; Mohammad
• Assistant Examiner(s): Panwalkar; Vineeta S
• Application Number:
  US10/223,817
• Time in Patent Office: 2,220 Days
• Field of Search: 375/130, 375/131, 375/132, 375/140, 375/219, 375/222, 375/220, 375/135, 375/136, 375/141, 375/146, 375/147, 375/295, 375/309, 375/315, 375/377, 324/343, 343/700.R, 343/737, 343/751, 343/729, 343/749, 342/350, 342/368
• US Class Current: 375/130
• CPC Class Codes: H01Q 1/007 specially adapted for indoor communication
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001

Abstract

A system for communicating between stations which are at a number of different locations in a large building in which radio transmission is achieved through corridors or stairwell shafts or through windows along a zone outside of the building or any combination thereof. This system employs communication through spread spectrum transceivers and a set of directional antennas. At each station, one of the antennas is circular polarized and the other is linear polarized with a horizontal electrical component to facilitate reflection off the floors of the building. The spread spectrum is a hybrid frequency hopped and direct sequence modulated signal.

Claims

1. A system for communication of electronic information between a plurality of electronic stations within a building comprising:

a plurality of spread spectrum transceivers, one of said transceivers being coupled to each station to provide spread spectrum signal transmission and reception for each station, said transmission between said stations being wireless,

a plurality of directional antennas;

wherein each of said transceivers is coupled to at least one of said antennas,

each of said antennas having a directional parameter to assure transmission between said transceivers of said spread spectrum signals over convoluted paths,

said convoluted paths being members of a group consisting of paths along communicating corridors at angles to one another on the floor of the building, and paths in and out of windows and paths along surfaces of the building.

2. The system of claim 1 wherein said spread spectrum signal is at least one of a frequency hopped modulated signal and a direct sequence modulated signal.

3. The system of claim 1 wherein at least some of said directional antennas are linear polarized having a substantial horizontal component.

4. The system of claim 2 wherein at least some of said directional antennas are linear polarized having a substantial horizontal component.

5. The system of claim 1 wherein at least some of said directional antennas are circular polarized.

6. The system of claim 2 wherein at least some of said directional antennas are circular polarized.

7. The system of claim 3 wherein at least some of said directional antennas are circular polarized.

8. The system of claim 4 wherein at least some of said directional antennas are circular polarized.

9. The system of claim 1 wherein said spread spectrum signal is a hybrid frequency hopped/direct sequence modulated signal.

10. The system of claim 3 wherein said spread spectrum signal is a hybrid frequency hopped/direct sequence modulated signal.

11. The system of claim 5 wherein said spread spectrum signal is a hybrid frequency hopped/direct sequence modulated signal.

12. The system of claim 7 wherein said spread spectrum signal is a hybrid frequency hopped/direct sequence modulated signal.

13. The system of claim 1 wherein said directional antenna include both those that are linear polarized having a substantial horizontal component and those that are circular polarized.

14. The system of claim 9 wherein said directional antenna include both those that are linear polarized having a substantial horizontal component and those that are circular polarized.