Doc.: IEEE 802.11-10/1243r0 SubmissionSlide 1 Preamble for 120MHz Date: 2010-11-10 Authors: Sun Bo,...

doc.: IEEE 802.11-10/1243r0

Submission Slide 1

Preamble for 120MHzDate: 2010-11-10

Name Affiliations Address Phone email

Jiang Jing ZTE corporation No.10, Sth Tangyan Rd., Xian, China

86 29 88723976

[email protected]

Sun Bo ZTE corporation No.10, Sth Tangyan Rd., Xian, China

86 29 88724130

[email protected]

Lv Kaiying ZTE corporation No.10, Sth Tangyan Rd., Xian, China

+86 29 88724130

[email protected]

Zhendong Luo

China Academy of Telecommunication Research (CATR)

No.52 Huayuan Bei Rd. Beijing, China

86 10 62300171

[email protected]

Siyang Liu China Academy of Telecommunication Research (CATR)

No.52 Huayuan Bei Rd. Beijing, China

86 10 62300175

[email protected]

Liang Peng China Telecom No. 118, Xizhimengnei St., Beijing, China

86 10 58552342

[email protected]

Wu Bin Institute of Microelectronics of Chinese Academy of Science

3 Beitucheng West Road,Chaoyang District,Beijing, PR China

86 10 82995715

[email protected]

Authors:

Sun Bo, ZTE Corporation

Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

Name Affiliations Address Phone email

HongLiang Ma

Institute of Microelectronics of Chinese Academy of Science

3 Beitucheng West Road,Chaoyang District,Beijing, PR China

86 10 82995715

[email protected]

ZhaoHui BUPT No10 XituCheng Rd., Beijing China

[email protected]

doc.: IEEE 802.11-10/1243r0

Submission Slide 3

Abstract

In R3.1.E: The draft specification shall include support for an efficient channelization in China’s (5,725 ~ 5,850 MHz) spectrum.

802.11ac is supposed to provide very high throughput, which requires to use wideband as much as possible. Following the Chinese spectrum and the existing 11ac tone allocations, we propose 802.11ac to support the 120 MHz PHY transmission.

Preamble have been defined for 80MHz and 160MHz (see ref. [1]). To support potential 120MHz transmission, this proposal put forward some preamble designs for 120MHz transmission.


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission Slide 4

120MHz PHY Transmission• Two feasible options for 120MHz PHY transmission:

– Option 1: Tone allocation for 120 MHz transmissions consists of one 80 MHz tone and one 40 MHz tone allocation in frequency.

– Option 2: Tone allocation for 120 MHz transmissions consists of a single120 MHz tone allocation in frequency.

To acquire more data tones and higher throughput, we prefer a single120 MHz tone allocation in frequency.

40MHz 80MHz

40MHz tone allocation 80MHz tone allocation

120 MHz

120MHz tone allocation

Option 1

Option 2


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

Non-VHT portion of VHT mixed format preamble (1)

• Cyclic shift definition – The CSD (Cyclic Shift Diversity) values for up to 4 antennas in L-STF, L-

LTF, and L-SIG are the same as the CSD values for the non-HT portion of the packet defined in Table 20-8 of Std 802.11n-2009.

• L-STF definition – The 20 MHz L-STF pattern in the VHT preamble is as defined in

20.3.9.3.3 of Std 802.11n-2009. The L-STF pattern for 120 MHz VHT transmissions shall repeat the 11n 20 MHz L-STF pattern in Equation (20-8) in each of the 20 MHz subchannel, then applying the following phase rotation per 20 MHz subchannel starting from the lowest 20 MHz subchannel in frequency: [c120], where c120 is the phase rotation per 20 MHz subchannel for 120 MHz transmissions and explained in the slide 13 .

Slide 5 Sun Bo, ZTE Corporation

Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

Non-VHT portion of VHT mixed format preamble (2)

• L-LTF definition – The 20 MHz L-LTF pattern in the VHT preamble is as defined in 20.3.9.3.4 of Std

802.11n-2009. – The 20 MHz L-LTF pattern in the VHT preamble is as defined in 20.3.9.3.3 of Std

802.11n-2009. The L-LTF pattern for 120 MHz VHT transmissions shall repeat the 11n 20 MHz L-LTF pattern in each of the 20 MHz subchannel, then applying the following phase rotation per 20 MHz subchannel starting from the lowest 20 MHz subchannel in frequency: [c120].

• L-SIG definition – The 20 MHz L-SIG pattern in the VHT preamble is as defined in 20.3.9.3.3 of Std

802.11n-2009. The L-SIG for 120 MHz VHT transmissions shall repeat the 11n 20 MHz L-SIG pattern in each of the 20 MHz subchannel, then applying the following phase rotation per 20 MHz subchannel starting from the lowest 20 MHz subchannel in frequency: [c120].


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

VHT portion of VHT mixed format preamble

• Cyclic shift definition – The CSD (Cyclic Shift Diversity) values for up to 4 antennas in VHT-

SIG-A are the same as the CSD values for the non-HT portion of the packet defined in Table 20-8 of Std 802.11n-2009. The CSD (Cyclic Shift Diversity) values for more larger than 4 antennas in VHT-SIG-A are the same as the CSD values for the VHT portion of the packet defined as3.2.3.2.1 in [1].

• VHT-SIG-A definition – The content of VHT-SIG-A is same as 3.2.3.2.2 in [1] except to increase 1

reserved bit for 120MHz bandwidth indication (see ref. [3]).


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

VHT-STF of 120MHz preamble

• VHT-STF definition – The 20 MHz L-STF pattern in the VHT preamble is as defined in

20.3.9.3.3 of Std 802.11n-2009. – The frequency domain sequence used to construct the VHT-STF in 20

MHz transmission is identical to the L-STF; in 120 MHz transmission, the VHT-STF is constructed from the 20 MHz version by replicating it in each 20 MHz band, frequency shifting, and applying the following phase rotation per 20 MHz subband starting from the lowest 20 MHz subchannel in frequency: [c120] .

– VHT-STF frequency sequence without rotating phase :

VHT-STF-186,186={L-STF-58 ， 58， 0 ， 0 ， 0 ， 0 ， 0 ， 0 ， 0 ， 0 ， 0 ， 0 ， 0 ， VHT-STF-122 ， 122}


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

VHT portion of VHT mixed format preamble

• VHT-LTF definition – The 20 MHz L-LTF pattern in the VHT preamble is as defined in

20.3.9.3.3 of Std 802.11n-2009. – The frequency domain sequence used to construct the VHT-LTF

in 20 MHz transmission is identical to the L-LTF; 120MHZ VHT-LTF use all 11n20 tones on both 20 MHz subchannels with filling of missing tones and applying a phase rotation on each 20MHz subchannel .


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

VHT LTF sequence structure• Assume that the VHT-LTF sequence is constructed by

]}1,-1,1,1,1,,-1,1,-1,1,-1,1,1,-11,-1,-1,-1[1],-1,1,-1,-1,1,-1,-1,1,[*.6],11,1,1,1,1,1,1,-1,1,-1,1,-1,-1,1,1,1,1,1,[1],-1,1,-1,1,1,-1,-1,[*.6

]],1,1,1,1[),3,2(L40[int*6)]1(L40int,]1,1,1,1[[*.5]1,-1,1,1,1,,-1,1,-1,1,-1,1,1,-11,-1,-1,-1[1],-1,1,-1,-1,1,-1,-1,1,[*.5

],11,1,1,1,1,1,1,-1,1,-1,1,-1,-1,1,1,1,1,1,[1],-1,1,-1,1,1,-1,-1,[*.5]],1,1,1,1[),3,2(L40[int*5)]1(L40int,]1,1,1,1[[*.4

]1,-1,1,1,1,,-1,1,-1,1,-1,1,1,-11,-1,-1,-1[1],-1,1,-1,-1,1,-1,-1,1,[*.4],11,1,1,1,1,1,1,-1,1,-1,1,-1,-1,1,1,1,1,1,[1],-1,1,-1,1,1,-1,-1,[*.4

120int*.4000,120int*.3],1,1[1],-1,1,1,-1,1,-1,,-1,1,1,-11,-1,-1,-11,1,-1,1,-- 1, 1, 1,- ,-1, 1[*.3

],1 1, 1, ,1, 1 1,- ,1, [-1] 1, 1, 1,- 1,- 1, ,1, ,1 ,1 ,1 1 ,-1, 1 1,- 1, ,1, ,-1 ,-1 1 1,[*.3]],1,1,1,1[),3,2(R40[int*3)]1(R40int,]1,1,1,1[[*.2

]1,1,1,1,1],1[,1,1,1,1,1111,111,1,1,1,1,1,1,1,1,1[*.2],1,1,1,1,1,1,1],1[,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1[*.2

]],1,1,1,1[),3,2(R40[int*2)]1(R40int,]1,1,1,1[[*.1]1,1,1,1,1],1[,1,1,1,1,1111,111,1,1,1,11,1,1,1,1[*.1

],1,1,1,1,1,1,1],1[,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1[*.1{VHTLTF 186186

cc

nullerpcnullerpccc

nullerpcnullerpccc

ExtraRerpcExtraLerpccc

nullerpcnullerpccc

nullerpcnullerpcc

c

，，

，

，，，，

，，，，，，，

，，，，，，，，

，


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

VHT LTF sequence structure• Assuming the VHT-LTF structure of previous slide, to minimize the PAPR, we need to optimize

– Missing tone values – 20 MHz phase rotations, [c1 c2 c3 c4 c5 c6]

– where S are 20MHz phase rotations, and interp120NullL, interp120NullR are LTF sequences for all possible missing tone values. For VHT-LTF, pilot tones are multiplied by an R value, while other tones are multiplied by a P value. P, R is defined in [2].

• Missing tones • interp40NullL(3 tones), interp120ExtraL (4 tones), interp120ExtraR (4 tones) ,

interp40NullR(3 tones)• interp40NullL= interp40NullR=[1 -1 1], as defined in 20.3.9.3.3 of Std 802.11n-2009.

• [c1 c2 c3 c4 c5 c6] is the phase rotation pattern consisting of {1, -1, j, -j} values。


Nov, 2010

]}RP,,tralRinert120Ex,tralLinert120ExS,x[PAPRma{argminVHTLTF,tralRinert120ExtralLinert120ExS

optimal ）（，， RP

doc.: IEEE 802.11-10/1243r0

Submission

Optimal Phase rotation and VHT-LTF sequence

• The parameters which result in the optimal VHT-LTF – Phase rotation [c1 c2 c3 c4 c5 c6] = [1 j -1 –j -1 j];– [interp120ExtraL, interp120ExtraR] = [1 1 -1 -1, 1 1 1 -1]

Phase Rotationsper 20 MHz band

PAPR (2x oversampled)

L-STF L-LTF VHT-LTF120

[c1 c2 c3 c4 c5 c6] = [1 1 1 1 1 1] 9.87 dB 11.36 dB 10.18 dB

[c1 c2 c3 c4 c5 c6] = [1 j 1 j 1 j] 6.86 dB 8.56 dB 8.30 dB

[c1 c2 c3 c4 c5 c6] = [1 -1 -1 -1 1 j] 4.33 dB 6.12 dB 6.43 dB

[c1 c2 c3 c4 c5 c6] = [1 j -1 -j -1 j] 3.47 dB 5.5 dB 4.86 dB


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

Optimal VHT-LTF sequence

• Optimal VHT-LTF frequency sequence (excluding phase rotation per 20 MHz subchannel) is

]1,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,11,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11,1,1,111

1,1,1,1,11,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,11,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11

11,1,1,11,1,1,1,1,1,1,1,1,1,1,111,111,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11111

00011111,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11,1,1,111

1,1,1,1,11,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,111

1,1,1,1,11,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,11,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1[VHTLTF 186186

，，，，，，，，

，，，，，，，，

，，，，，，，，，，

，，，，，，，，，，，，，，，，

，，，，，，，，

，，，，，，，，，


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission Slide 14

Phase Rotation for preamble and data tones

• In all elements of an 120 MHz VHT PPDU , i.e., the L-STF, L-LTF, L-SIG, VHT-SIG-A, VHT-LTFs, VHT-SIG-B and the Data, subcarrier k, where , shall be multiplied by the following function of k, prior to transmission:

LvKaiying, ZTE Corporation

Nov. 2010

186 186k

128k,128k64,1

64k1,0k64,164k128,

128k,1

k

j

j

j

doc.: IEEE 802.11-10/1243r0

Submission Slide 15

Straw poll #1

• Do you support adding the following text into the specification framework document, 15-09/0992?

" L-STF definition – The 20 MHz L-STF pattern in the VHT preamble is as defined in

20.3.9.3.3 of Std 802.11n-2009. This corresponds to repeating the 11n 20 MHz L-STF pattern in Equation (20-8) in each of the 20 MHz subchannel, then applying the following phase rotation per 20 MHz subchannel starting from the lowest 20 MHz subchannel in frequency: [c120], where c120 is the phase rotation per 20 MHz subchannel for 120 MHz transmissions and explained in the slide 11.”

– Yes:– No:– Abstain:


Nov. 2010

doc.: IEEE 802.11-10/1243r0

Submission Slide 16

Straw poll #2• Do you support adding the following text into the specification

framework document, 15-09/0992? " L-LTF definition – The 20 MHz L-LTF pattern in the VHT preamble is as defined in

20.3.9.3.4 of Std 802.11n-2009. – The L-LTF pattern for 120 MHz VHT transmissions shall repeat the 20

MHz L-LTF pattern six times in frequency. The L-LTF for 120 MHz VHT transmissions shall repeat the 11n 20 MHz L-LTF pattern in each of the 20 MHz subchannel, then applying the following phase rotation per 20 MHz subchannel starting from the lowest 20 MHz subchannel in frequency: [c120], where c120 is the phase rotation per 20 MHz subchannel for 120 MHz transmissions.”

• Yes:• No:• Abstain:


Nov. 2010

doc.: IEEE 802.11-10/1243r0

Submission Slide 17

Straw poll #3

• Do you support adding the following text into the specification framework document, 15-09/0992? " L-SIG definition – The 20 MHz L-SIG pattern in the VHT preamble is as defined in

20.3.9.3.3 of Std 802.11n-2009. The L-SIG for 120 MHz VHT transmissions shall repeat the 11n 20 MHz L-SIG pattern in each of the 20 MHz subchannel, then applying the following phase rotation per 20 MHz subchannel starting from the lowest 20 MHz subchannel in frequency: [c120].”



Nov. 2010

doc.: IEEE 802.11-10/1243r0

Submission Slide 18

Straw poll #4


" VHT-STF definition – The 20 MHz L-STF pattern in the VHT preamble is as defined in

20.3.9.3.3 of Std 802.11n-2009. – The frequency domain sequence used to construct the VHT-STF in 20

MHz transmission is identical to the L-STF; in 120 MHz transmission, the VHT-STF is constructed from the 20 MHz version by replicating it in each 20 MHz band, frequency shifting, and applying the following phase rotation per 20 MHz subband starting from the lowest 20 MHz subchannel in frequency: [c120].”



Nov. 2010

doc.: IEEE 802.11-10/1243r0

Submission Slide 19

Straw poll #5


" VHT-LTF frequency sequence (excluding phase rotation per 20 MHz subchannel) is



Nov. 2010

]1,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,11,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11,1,1,111

1,1,1,1,11,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,11,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11

11,1,1,11,1,1,1,1,1,1,1,1,1,1,111,111,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11111

00011111,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,11,1,1,111

1,1,1,1,11,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,111

1,1,1,1,11,1,1,1,1,1,1,1,1,1,1111,111,1,1,1,11,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1[VHTLTF 186186

，，，，，，，，

，，，，，，，，

，，，，，，，，，，

，，，，，，，，，，，，，，，，

，，，，，，，，

，，，，，，，，，

doc.: IEEE 802.11-10/1243r0

Submission Slide 20

Straw poll #6

• Do you support adding the following text into the specification framework document, 15-09/0992?– In all elements of an 120 MHz VHT PPDU , i.e., the L-STF, L-LTF, L-

SIG, VHT-SIG-A, VHT-LTFs, VHT-SIG-B and the Data, subcarrier k, where , shall be multiplied by the following function of k, prior to transmission:



Nov. 2010

186 186k

128k,128k64,1

64k1,0k64,164k128,

128k,1

k

j

j

j

doc.: IEEE 802.11-10/1243r0

Submission

References

[1] Stacey, R. et al., Specification Framework for TGac, IEEE 802.11-09/0992r11, May 2010.

[2] IEEE Std 802.11n-2009.[3] 10/XXXXr0, “signal fields design for 120MHz bandwidth”.


Nov, 2010

doc.: IEEE 802.11-10/1243r0

Submission

Thank you!


Nov, 2010

Doc.: IEEE 802.11-10/1243r0 SubmissionSlide 1 Preamble for 120MHz Date: 2010-11-10 Authors: Sun Bo,...

Documents

Transcript of Doc.: IEEE 802.11-10/1243r0 SubmissionSlide 1 Preamble for 120MHz Date: 2010-11-10 Authors: Sun Bo,...