Methods and Apparatus for Polarization Diversity with Portable Devices via Wavefront Muxing Techniques

• US 20150003830A1
• Filed: 09/12/2014
• Published: 01/01/2015
• Est. Priority Date: 07/30/2010
• Status: Active Grant

• Current Assignee: Spatial Digital Systems Inc
• Original Assignee: Spatial Digital Systems Inc
• Inventors: Chang, Donald C.D.
• Granted Patent: US 9,065,591 B2
• Time in Patent Office: Days
• US Class Current: 398/65
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04B 7/185 Space-based or airborne stations; Stations for satellite systemsH04B7/204 takes precedence
• CPC Class Codes: H04J 14/06 Polarisation multiplex systems
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

A novel terrestrial wireless communications technique for terrestrial portable terminals including hand-held mobile devices and fixed wireless instruments, utilizing a spoke-and-hub communications system, having a plurality of individual hubs and/or base-stations all in communications with the portable terminals. The portable terminals and the hubs are assigned to use incompatible polarity formats in terms of circularly polarity (CP) and linearly polarity (LP). In forward links, a signal processed by the LP ground telecommunications hubs is radiated through multiple antennas with various LP polarities to an individual CP user simultaneously. The multiple paths are organized via assignments of a plurality of polarities, frequency slots, and directions by wavefront multiplexing/demultiplexing techniques such that the same communications assets including frequency spectrum may be re-used by other users. The same polarity diversity methods can be extended to peer-to-peer communications.

Claims

1. A system for wireless communications configured to form a first linearly-polarized communications channel and a second linearly-polarized communications channel arranged in parallel with said first linearly-polarized communications channel, wherein said first and second linearly-polarized communications channels are configured to relay first data from a first circularly-polarized portable device, wherein said first linearly-polarized communications channel is configured to transmit a first combination associated with said first data, and said second linearly-polarized communications channel is configured to transmit a second combination associated with said first data, wherein said first linearly-polarized communications channel utilizes a polarization different from one said second linearly-polarized communications channel utilizes.

2. The system of claim 1, wherein said first and second linearly-polarized communications channels are configured to relay said first data from said first circularly-polarized portable device configured to utilize right-hand circular polarization (RHCP).

3. The system of claim 1 further configured to reconstruct said first data based on said first and second combinations transmitted respectively by said first and second linearly-polarized communications channels.

4. The system of claim 1, wherein said first and second linearly-polarized communications channels are configured to relay second data from a second circularly-polarized portable device, wherein said first combination is further associated with said second data, and said second combination is further associated with said second data.

5. The system of claim 4 further configured to reconstruct said first and second data based on said first and second combinations transmitted respectively by said first and second linearly-polarized communications channels.

6. The system of claim 4, wherein said first and second linearly-polarized communications channels are configured to relay said first data from said first circularly-polarized portable device configured to utilize right-hand circular polarization (RHCP), and said first and second linearly-polarized communications channels are configured to relay said second data from said second circularly-polarized portable device configured to utilize left-hand circular polarization (LHCP).

7. The system of claim 4, wherein said first and second linearly-polarized communications channels are configured to relay said first data at a common frequency slot from said first circularly-polarized portable device and to relay said second data at said common frequency slot from a second circularly-polarized portable device, wherein said first combination is further associated with said second data, and said second combination is further associated with said second data.

8. The system of claim 4, wherein said first combination comprises a linear combination of said first and second data.

9. The system of claim 8, wherein said second combination comprises another linear combination of said first and second data.

10. The system of claim 1, wherein said first combination comprises a combination associated with said first data weighted by a complex number.

11. The system of claim 1 further configured to equalize amplitude and phase effects of said first and second linearly-polarized communications channels.

12. The system of claim 1, wherein said first linearly-polarized communications channel utilizes horizontal polarization, and said second linearly-polarized communications channel utilizes vertical polarization.

13. The system of claim 1, wherein said first and second linearly-polarized communications channels are configured to relay said first data at a common frequency slot from said first circularly-polarized portable device.

14. A system for wireless communications configured to form a first communications channel at a first frequency slot and a second communications channel at a second frequency slot different from said first frequency slot, wherein said second communications channel is arranged in parallel with said first communications channel, wherein said first and second communications channels are configured to relay first data from a first portable device, wherein said first communications channel is configured to transmit a first combination associated with said first data, and said second linearly-polarized communications channel is configured to transmit a second combination associated with said first data.

15. The system of claim 14, wherein said first communications channel utilizes horizontal polarization, and said second communications channel utilizes vertical polarization.

16. The system of claim 14, wherein both of said first and second communications channels utilizes horizontal polarization.

17. The system of claim 14, wherein both of said first and second communications channels utilizes vertical polarization.

18. The system of claim 14, wherein said first and second communications channels are configured to relay second data from a second portable device, wherein said first combination is further associated with said second data, and said second combination is further associated with said second data.

19. The system of claim 18, wherein said first combination comprises a linear combination of said first and second data.

20. The system of claim 14 further configured to reconstruct said first data based on said first and second combinations transmitted respectively by said first and second communications channels.