Polarization diversity with portable devices via wavefront muxing techniques

• US 8,862,050 B2
• Filed: 09/13/2011
• Issued: 10/14/2014
• 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.
• Primary Examiner(s): Pham, Tuan
• Application Number:
  US13/231,681
• Publication Number:
  US 20120183295A1
• Time in Patent Office: 1,127 Days
• Field of Search: 455/501, 455/63.1, 455/67.16, 455/101, 455/102, 455/105, 455/108, 455/12.1
• US Class Current: 455/12.1
• 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 comprising:

a first circularly-polarized (CP) portable device;

a horizontally-polarized (HP) communications channel; and

a vertically-polarized (VP) communications channel arranged in parallel with said horizontally-polarized (HP) communications channel, wherein said horizontally-polarized (HP) and vertically-polarized (VP) communications channels are configured to relay first data from said first circularly-polarized (CP) portable device at a common frequency slot, wherein said horizontally-polarized (HP) communications channel is configured to transmit a first combination associated with said first data, and said vertically-polarized (VP) communications channel is configured to transmit a second combination associated with said first data.

2. The system of claim 1, wherein said first circularly-polarized (CP) portable device is configured to utilize right-hand circular polarization (RHCP).

3. The system of claim 1 further comprising a polarization realignment processor arranged downstream of said horizontally-polarized (HP) and vertically-polarized (VP) communications channels, wherein said polarization realignment processor is configured to reconstruct said first data from said first and second combinations, wherein said first circularly-polarized (CP) portable device is arranged upstream of said horizontally-polarized (HP) and vertically-polarized (VP) communications channels.

4. The system of claim 1 further comprising a second circularly-polarized (CP) portable device, wherein said horizontally-polarized (HP) and vertically-polarized (VP) communications channels are configured to relay second data from said second circularly-polarized (CP) portable device at said common frequency slot.

14. The system of claim 4, wherein said first combination is further associated with said second data, and said second combination is further associated with said second data.

15. The system of claim 14 further comprising a polarization realignment processor arranged downstream of said horizontally-polarized (HP) and vertically-polarized (VP) communications channels, wherein said polarization realignment processor is configured to reconstruct said first data from said first and second combinations and reconstruct said second data from said first and second combinations, wherein said first and second circularly-polarized (CP) portable devices are arranged upstream of said horizontally-polarized (HP) and vertically-polarized (VP) communications channels.

16. The system of claim 4, wherein said first circularly-polarized portable device is configured to utilize right-hand circular polarization (RHCP) and said second circularly-polarized portable device is configured to utilize left-hand circular polarization (LHCP).

17. The system of claim 1, wherein said first circularly-polarized (CP) portable device is configured to utilize left-hand circular polarization (LHCP).

18. The system of claim 1 further comprising a diagnostic and compensation circuit configured to equalize amplitude and phase effects of said horizontally-polarized (HP) and vertically-polarized (VP) communications channels.

5. A method for wireless communications comprising:

relaying first data from a first circularly-polarized portable device through horizontally-polarized (HP) and vertically-polarized (VP) communications channels concurrently at a common frequency slot, wherein said horizontally-polarized (HP) communications channel is configured to transmit a first combination associated with said first data, and said vertically-polarized (VP) communications channel is configured to transmit a second combination associated with said first data.

6. The method of claim 5, wherein said first circularly-polarized portable device is configured to utilize right-hand circular polarization.

7. The method of claim 5, after said relaying said first data from said first circularly-polarized portable device through said horizontally-polarized (HP) and vertically-polarized (VP) communications channels concurrently at said common frequency slot, further comprising reconstructing said first data from said first and second combinations.

8. The method of claim 5 further comprising relaying second data from a second circularly-polarized portable device through said horizontally-polarized (HP) and vertically-polarized (VP) communications channels concurrently at said common frequency slot.

9. The method of claim 8, wherein said first combination is further associated with said second data, and said second combination is further associated with said second data.

10. The method of claim 9, after said relaying said first data from said first circularly-polarized portable device through said horizontally-polarized (HP) and vertically-polarized (VP) communications channels concurrently at said common frequency slot and after said relaying said second data from said second circularly-polarized portable device through said horizontally-polarized (HP) and vertically-polarized (VP) communications channels concurrently at said common frequency slot, further comprising reconstructing said first data from said first and second combinations and reconstructing said second data from said first and second combinations.

11. The method of claim 8, wherein said first circularly-polarized portable device is configured to utilize right-hand circular polarization (RHCP) and said second circularly-polarized portable device is configured to utilize left-hand circular polarization (LHCP).

12. The method of claim 5, wherein said first circularly-polarized portable device is configured to utilize left-hand circular polarization (LHCP).

13. The method of claim 5 further comprising equalizing amplitude and phase effects of said horizontally-polarized (HP) and vertically-polarized (VP) communications channels.

19. A method for wireless communications comprising:

relaying first data from a first circularly-polarized portable device through first and second linearly-polarized (LP) communications channels concurrently at a common frequency slot, wherein said first linearly-polarized (LP) communications channel is configured to transmit a first combination associated with said first data, and said second linearly-polarized (LP) communications channel is configured to transmit a second combination associated with said first data, wherein said first linearly-polarized (LP) communications channel utilizes a polarization different from that said second linearly-polarized (LP) communications channel utilizes.

20. The method of claim 19 further comprising relaying second data from a second circularly-polarized portable device through said first and second linearly-polarized (LP) communications channels concurrently at said common frequency slot, wherein said first combination is further associated with said second data, and said second combination is further associated with said second data.