DISTRIBUTED PILOTS FOR SINGLE CARRIER TRANSMISSION

• US 20160330059A1
• Filed: 05/05/2016
• Published: 11/10/2016
• Est. Priority Date: 05/07/2015
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Eitan, Alecsander, Sanderovich, Amichai
• Application Number:
  US15/147,435
• Publication Number:
  US 20160330059A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/1505 Golay Codes
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2675 Pilot or known symbols
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets

Abstract

Certain aspects of the present disclosure provide methods and apparatuses for generating a frame for wireless transmission, wherein the frame comprises a payload including a plurality of blocks, each block comprising a data portion and a plurality of pilots distributed in the data portion. The distributed pilots may be used by a receiver receiving the frame to perform phase tracking during the data portions of the blocks to reduce phase noise.

Claims

1. An apparatus for wireless communications, comprising:

a processing system configured to generate a frame, wherein the frame comprises a payload including a plurality of blocks, each block comprising a data portion and a plurality of pilots distributed in the data portion; and

an interface configured to output the frame for wireless transmission.

2. The apparatus of claim 1, wherein each of the plurality of pilots comprises one or more pilot symbols.

3. The apparatus of claim 1, wherein an average space between adjacent pilots in the data portion of at least one of the blocks is between 10 and 120 symbols.

4. The apparatus of claim 1, wherein the pilots in the data portion of at least one of the blocks are approximately evenly distributed in the data portion.

5. The apparatus of claim 1, wherein each of the plurality of pilots in the data portion of at least one of the blocks comprises a single pilot symbol.

6. The apparatus of claim 1, wherein the processing system is further configured to insert a guard interval in each of the plurality of blocks.

7. The apparatus of claim 6, wherein the guard interval of at least one of the blocks comprises a first portion of a Golay sequence, and a second portion of the Golay sequence being distributed among the pilots in the data portion.

8. The apparatus of claim 7, wherein the Golay sequence comprises at least one of a 64-symbol Golay sequence, a 128-symbol Golay sequence, or a 256-symbol Golay sequence.

9. The apparatus of claim 1, wherein the processing system is configured to receive data symbols, and to distribute the received data symbols among the data portions of the blocks.

10. The apparatus of claim 9, wherein the frame further comprises a header, and the processing system is configured to determine a modulation and coding scheme (MCS) used to encode and modulate data into the data symbols, and to insert an indication of the determined MCS in the header.

11. A method for wireless communications, comprising:

generating a frame, wherein the frame comprises a payload including a plurality of blocks, each block comprising a data portion and a plurality of pilots distributed in the data portion; and

outputting the frame for wireless transmission.

12. The method of claim 11, wherein each of the plurality of pilots comprises one or more pilot symbols.

13. The method of claim 11, wherein an average space between adjacent pilots in the data portion of at least one of the blocks is between 10 and 120 symbols.

14. The method of claim 11, wherein the pilots in the data portion of at least one of the blocks are approximately evenly distributed in the data portion.

15. The method of claim 11, wherein each of the plurality of pilots in the data portion of at least one of the blocks comprises a single pilot symbol.

16. The method of claim 11, further comprising inserting a guard interval in each of the plurality of blocks.

17. The method of claim 16, wherein the guard interval of at least one of the blocks comprises a first portion of a Golay sequence, and a second portion of the Golay sequence being distributed among the pilots in the data portion.

18. The method of claim 17, wherein the Golay sequence comprises at least one of a 64-symbol Golay sequence, a 128-symbol Golay sequence, or a 256-symbol Golay sequence.

19. The method of claim 11, further comprising:

receiving data symbols; and

distributing the received data symbols among the data portions of the blocks.

20. The method of claim 19, wherein the frame further comprises a header, and the method further comprises:

determining a modulation and coding scheme (MCS) used to encode and modulate data into the data symbols; and

inserting an indication of the determined MCS in the header.

21-32. -32. (canceled)

33. An apparatus for wireless communications, comprising:

an interface for receiving a signal comprising a frame, wherein the frame comprises a payload including a plurality of blocks, each block comprising a data portion and a plurality of pilots distributed in the data portion; and

a processing system configured to determine a location of each of the plurality of pilots in one or more of the blocks, to measure a phase at each of the locations using the respective pilot, and to track phase changes in the received signal based on the measured phases.

34. The apparatus of claim 33, wherein the processing system is configured to determine the location of each of the plurality of pilots using block format information stored at the apparatus.

41. The apparatus of claim 33, wherein the processing system is further configured to recover data symbols from the data portions of the blocks.

42. The apparatus of claim 41, wherein the frame further comprises a header indicating a modulation scheme, and the processing system is further configured to demodulate the data symbols based on the indicated modulation scheme.

35-40. -40. (canceled)

43-64. -64. (canceled)