Apparatus, methods, and computer program products providing partial MIMO reception and decoding

• US 20090129513A1
• Filed: 11/17/2008
• Published: 05/21/2009
• Est. Priority Date: 11/16/2007
• Status: Abandoned Application

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Melvasalo, Maarit, Henriksson, Jukka
• Application Number:
  US12/313,190
• Publication Number:
  US 20090129513A1
• Time in Patent Office: Days
• US Class Current: 375/340
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0469 taking special antenna structures, e.g. cross polarized antennas into account
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0224 using sounding signals

Abstract

In a first aspect, there are received m transmitted signals of a multiple input/multiple output transmission comprising n transmitted signals corresponding to n streams of n different polarizations, where n is a positive integer greater than one, and m is an integer less than n. The m received signals are decoded to obtain information for the corresponding streams. Apparatus and computer programs to implement the invention are also detailed.

Claims

1. A method comprising:

receiving m transmitted signals of a multiple input/multiple output transmission comprising n transmitted signals corresponding to n streams of n different polarizations, where n is a positive integer greater than one and m is an integer less than n; and

decoding the m received signals to obtain information for the corresponding streams.

2. The method according to claim 1, wherein streams of the multiple input/multiple output transmission are independently coded and cross-polarized.

3. The method according to claim 1, wherein the decoding comprises considering a portion of the multiple input/multiple output transmission apart from the received m transmitted signals as interference with respect to the received m transmitted signals.

4. The method according to claim 3, wherein the portion of the multiple input/multiple output transmission apart from the received m transmitted signals is sent to a multi-stage inter-antenna interference cancellation receiver wherein cancellation is based on reliable channel estimates from transmit antennas and symbol constellations.

5. The method according to claim 2, wherein the multiple input/multiple output transmission comprises a plurality of services which are separately coded and modulated, and a plurality of streams where each stream has a different signal power.

6. The method according to claim 5, further comprising utilizing common signaling to indicate a symbol constellation of all the plurality of services.

7. The method according to claim 2, wherein observed channels of the multiple input/multiple output transmission are substantially independent.

8. The method according to claim 1, wherein the receiving is by a receiver comprising a plurality of antennas, wherein the receiver is configured to receive the entirety of the multiple input/multiple output transmission.

22. The method according to claim 2, wherein the decoding comprises considering a portion of the multiple input/multiple output transmission apart from the received m transmitted signals as interference with respect to the received m transmitted signals.

23. The method according to claim 22, wherein the portion of the multiple input/multiple output transmission apart from the received m transmitted signals is sent to a multi-stage inter-antenna interference cancellation receiver wherein cancellation is based on reliable channel estimates from transmit antennas and symbol constellations.

24. The method according to claim 2, wherein the receiving is by a receiver comprising a plurality of antennas, wherein the receiver is configured to receive the entirety of the multiple input/multiple output transmission.

9. A memory readable by a processor, tangibly embodying a program of instructions that when executed by the processor result in operations comprising:

receiving m transmitted signals of a multiple input/multiple output transmission comprising n transmitted signals corresponding to n streams of n different polarizations, where n is a positive integer greater than one and m is an integer less than n; and

decoding the m received signals to obtain information for the corresponding streams.

10. The memory as in claim 10, wherein the multiple input/multiple output transmission comprises a plurality of digital video broadcast services that are separately coded and modulated, and a plurality of streams where each stream has a different signal power.

11. An apparatus comprising:

a receiver configured to receive m transmitted signals of a multiple input/multiple output comprising n transmitted signals corresponding to n streams of n different polarizations, where n is a positive integer greater than one and m is an integer less than n; and

a decoder configured to decode the m received signals to obtain information for the corresponding streams.

12. The apparatus according to claim 11, wherein the streams of the multiple input/multiple output transmission are independently coded and cross-polarized.

13. The apparatus according to claim 11, wherein the decoder is configured to consider a portion of the multiple input/multiple output transmission apart from the received m transmitted signals as interference with respect to the received m transmitted signals.

14. The apparatus according to claim 13, further comprising a multi-stage inter-antenna inference cancellation receiver to which the portion of the multiple input/multiple output transmission apart from the received m transmitted signals is sent, and in which cancellation is based on reliable channel estimates from transmit antennas and symbol constellations.

15. The apparatus according to claim 12, wherein the multiple input/multiple output transmission comprises a plurality of services which are separately coded and modulated, and a plurality of streams where each stream has a different signal power.

16. The apparatus according to claim 15, in which common signaling is utilized to indicate a symbol constellation of all the plurality of services.

17. The apparatus according to claim 12, wherein observed channels of the multiple input/multiple output transmission are substantially independent.

18. The apparatus according to claim 11, further comprising a receiver and a plurality of antennas which are configured to receive the entirety of the multiple input/multiple output transmission.

25. The apparatus according to claim 12, wherein the decoder is configured to consider a portion of the multiple input/multiple output transmission apart from the received m transmitted signals as interference with respect to the received m transmitted signals.

26. The apparatus according to claim 25, further comprising a multi-stage inter-antenna inference cancellation receiver to which the portion of the multiple input/multiple output transmission apart from the received m transmitted signals is sent, and in which cancellation is based on reliable channel estimates from transmit antennas and symbol constellations.

27. The apparatus according to claim 12, further comprising a receiver and a plurality of antennas which are configured to receive the entirety of the multiple input/multiple output transmission.

19. An apparatus comprising a processor configured to:

receive m transmitted signals of a multiple input/multiple output transmission comprising n transmitted signals corresponding to n streams of n different polarizations, where n is a positive integer greater than one and m is an integer less than n; and

decode the m received signals to obtain information for the corresponding streams.

20. The apparatus according to claim 19, in which the streams of the multiple input/multiple output transmission are independently coded and cross-polarized.

21. The apparatus according to claim 19, wherein the m received signals are decoded by considering a portion of the multiple input/multiple output transmission apart from the received m transmitted signals as interference with respect to the received m transmitted signals.

28. The apparatus according to claim 20, wherein the m received signals are decoded by considering a portion of the multiple input/multiple output transmission apart from the received m transmitted signals as interference with respect to the received m transmitted signals.