Pilot Pattern for 120MHz Date: Authors: Month Year

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Presentation transcript:

Pilot Pattern for 120MHz Date: 2010-11-10 Authors: Month Year doc.: IEEE 802.11-yy/xxxxr0 Pilot Pattern for 120MHz Date: 2010-11-10 Authors: Slide 1 Sun Bo, ZTE Corp Page 1 John Doe, Some Company

Abstract In R3.1.E: The draft specification shall include support for an efficient channelization in China’s (5,725 ~ 5,850 MHz) spectrum. To complement with a 120MHz signal design, the pilot pattern design is proposed in this contribution, including: Number and location of pilot tone Guard tone DC tone Slide 2 Sun Bo, ZTE Corp

Background In last Hawaii meeting, following statements were accepted: In R3.1.E: The draft specification shall include support for an efficient channelization in China’s (5,725 ~ 5,850 MHz) spectrum. A possible 120MHz signal solution in Chinese 5GHz spectrum is as figured below. 5727.5 7.5 5735 40MHz 80MHz 20MHz 5847.5 f MHz 120MHz 5835 12.5 Sun Bo, ZTE Corp

Legacy pilot pattern for 20MHz The pilot pattern for 20MHz in 802.11n spec is as below. There are totally 64 subcarriers containing: 4 pilot tones located at {±7, ±21} (6 left+5 right) guard tones 3 DC tones Slide 4 Sun Bo, ZTE Corp

Pilot Pattern for a Single 80MHz Design for 80MHz [2] Repetition of the LSIG pilot pattern across 80MHz Not desirable to change pilot positions between the legacy (11a/n) and VHT parts of the packet. For simple receiver design, better to pick 80MHz pilots among the pilots after repetition Considering the tradeoff between the performance and overhead 8 pilots for 80MHz has been accepted also 16 pilots for 160MHz Slide 5 Sun Bo, ZTE Corp

Pilot Pattern for a Single 120MHz Design for 120MHz using the method of 80MHz Pilot pairs of 20MHz are located at {±7, ±21} Repeating pilot pattern of 20MHz 5 times Totally 384 subcarriers for 120MHz signal. Pilot pairs are located at {±11, ±25, ±39, ±53, ±75, ±89, ±103, ±117 , ±139, ±153, ±167, ±181} . Propose to use 12 polits for 120MHz Pilots location pairs:{±11, ±39, ±75, ±103, ±139, ±167} with maximally separated. (6 left+5 right) guard tones and 3 DC tones. Slide 6 Sun Bo, ZTE Corp

References [1] IEEE Std 802.11n-2009. [2]Sudhir Srinivasa . et al., “80MHz Tone Allocation”, IEEE 802.11-10/0370r01 Sun Bo, ZTE Corp

Thank you!