SYSTEMS AND METHODS FOR GENERATING PREAMBLE SYMBOLS IN COMMUNICATION SYSTEMS

• US 20160330006A1
• Filed: 07/21/2016
• Published: 11/10/2016
• Est. Priority Date: 01/30/2012
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Zhang, Hongyuan, Srinivasa, Sudhir
• Granted Patent: US 10,148,399 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method for transmitting an 802.11ah packet is provided. A training field sequence is generated using control circuitry. A preamble for a packet is generated using the control circuitry. The preamble includes a training field symbol which includes the training field sequence. A portion of the training field sequence is within a plurality of guard tones of the training field symbol. The preamble is transmitted using transmit circuitry.

Claims

1-20. -20. (canceled)

21. A method for transmitting a wireless packet, the method comprising:

generating, using control circuitry, a signaling field including parameters for decoding the wireless packet for a first bandwidth, wherein the signaling field sequence has a first number count of tones that is less than a number count of tones in a training field sequence that includes channel estimation information;

generating, using the control circuitry, a signaling field sequence, for a second bandwidth, that is a multiple of the first bandwidth, by transmitting the signaling field sequence for the first bandwidth in each of a plurality of sub-bands;

generating, using the control circuitry, a preamble for a packet, wherein the preamble comprises the training field sequence and the signaling field sequence for the second bandwidth; and

transmitting, using transmit circuitry, the preamble.

22. The method of claim 21, wherein generating the preamble for the second bandwidth, that is a multiple of the first bandwidth, comprises repeating the signaling field sequence for the first bandwidth for transmission in each of the plurality of sub-bands, including phase-rotating the respective signaling field sequence in each respective sub-band.

23. The method of claim 22, wherein repeating and phase-rotating the signaling field sequence for the first bandwidth causes tones in the signaling field sequence for the second bandwidth, that is a multiple of the first bandwidth, to increase in number count from the first number count of tones to a second number count of tones.

24. The method of claim 23, wherein generating a signaling field sequence comprises generating a number count of tones providing configuration parameters of the wireless packet.

25. The method of claim 24, wherein generating a signaling field sequence for a second bandwidth comprises generating a second number count of tones in the signaling field sequence, wherein the second number count of tones is equal to the number count of tones in the training field sequence.

26. The method of claim 24, wherein generating a signaling field sequence for a second bandwidth comprises generating the second number count of tones in the signaling field sequence, wherein the second number count of tones is less than the number count of tones in the training field sequence.

27. The method of claim 24, wherein generating a signaling field sequence for a second bandwidth comprises generating the second number count of tones such that each tone in the signaling field sequence for the second bandwidth has a corresponding tone among the number count of tones in the training field sequence.

28. The method of claim 21, wherein generating a signaling field sequence for the second bandwidth further comprises identifying for removal, using the control circuitry, selected tones among the first number count of tones in the signaling field sequence for the first bandwidth.

29. The method of claim 28, wherein identifying for removal selected tones comprises identifying reserve bits and identification information for removal.

30. The method of claim 29, wherein identifying reserve bits and identification information for removal comprises identifying for removal Partial Association Identification (PAID) bits used to identify a wireless station.

31. An apparatus for transmitting a wireless packet, the apparatus comprising:

field generation circuitry configured to;

generate a signaling field sequence including parameters for decoding the wireless packet for a first bandwidth, wherein the signaling field sequence has a first number count of tones that is less than a number count of tones in a training field sequence that includes channel estimation information; and

generate a signaling field sequence for a second bandwidth, that is a multiple of the first bandwidth, by transmitting the signaling field sequence for the first bandwidth in each of a plurality of sub-bands;

preamble generation circuitry configured to generate a preamble for a packet, wherein the preamble comprises the training field sequence and the signaling field sequence for the second bandwidth; and

transmit circuitry configured to transmit the preamble.

32. The apparatus of claim 31, wherein the preamble generation circuitry is configured to generate the preamble for the second bandwidth, that is a multiple of the first bandwidth, by repeating the signaling field sequence for the first bandwidth for transmission in each of the plurality of sub-bands, including phase-rotating the respective signaling field sequence in each respective sub-band.

33. The apparatus of claim 32, wherein the preamble generation circuitry is configured to cause tones in the signaling field sequence for the second bandwidth, that is a multiple of the first bandwidth, to increase in number count from the first number count of tones to a second number count of tones, by repeating and phase-rotating the signaling field sequence for the first bandwidth.

34. The apparatus of claim 33, wherein the field generation circuitry is configured to generate the first number count of tones in the signaling field sequence to provide configuration parameters of the wireless packet.

35. The apparatus of claim 34, wherein the field generation circuitry is configured to generate the second number count of tones in the signaling field sequence for the second bandwidth such that the second number count of tones is equal to the number count of tones in the training field sequence.

36. The apparatus of claim 34, wherein the field generation circuitry is configured to generate the second number count of tones in the signaling field sequence for the second bandwidth such that the second number count of tones is less than the number count of tones in the training field sequence.

37. The apparatus of claim 34, wherein the field generation circuitry is configured to generate the second number count of tones in the signaling field sequence for the second bandwidth such that each tone in the signaling field sequence for the second bandwidth has a corresponding tone among the number count of tones in the training field sequence.

38. The apparatus of claim 31, wherein the field generation circuitry is further configured to identify for removal selected tones among the first number count of tones in the signaling field sequence for the first bandwidth.

39. The apparatus of claim 38, wherein the field generation circuitry is configured to select tones for removal that comprise reserve bits and identification information.

40. The apparatus of claim 39, wherein the field generation circuitry is configured to select tones for removal that include Partial Association Identification (PAID) bits used to identify a wireless station.