1. Data Subcarrier and Interleaving for 120MHz
Month Year
doc.: IEEE yy/xxxxr0
Data Subcarrier and Interleaving for 120MHz
Date:
Authors:
Slide 1
Sun Bo, ZTE Corp
Page 1
John Doe, Some Company

2. 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 number of data subcarrier and the frequency interleaver design is proposed in this contribution .
Slide 2
Sun Bo, ZTE Corp

3. 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

4. The Challenge to 120MHz Signal Design
In order to obtain best spectral efficiency, the maximal number of the data tone can be calculated
Maximal data point = FFT point - Pilot tone - DC tone - Guard tone
The selection of the data tone number must consider the frequency interleave
Throughput using 120MHz transmission
1 Gbps throughput must be achieved
Increase the data throughput about 50%, compared with 80 MHz transmission

5. Data Tones for Single 120MHz Signal
Propose to use :
Single 384 point FFT
12 Pilot tones,3 DC tones, 6 left guard tones, 5 right guard tones
348 data tones although 358 subcarriers can be used
Data rate with some MCS
# Streams
MCS BW
#data tones / symbol
MAC Throughput* 8
256-QAM 3/4
40 MHz
108
1.01 Gbps 4
80 MHz
234
1.09 Gbps 3
64-QAM 2/3
160 MHz
468 2
16-QAM 2/3
120MHz
348
1.08 Mbps
1.22Gbps
Slide 5
Sun Bo, ZTE Corp

6. Frequency Interleave for Single 120MHz Signal
Frequency interleave parameters for 120MHz
NCOL = 29
NROW = 12 *NBPSCS (iSS)
NROT = 87 for 4 or fewer streams
Parameters
40MHz
80MHz
120MHz
NCOL 18 26 29
NROW
6 × NBPSCS(iss)
9× NBPSCS(iss)
12 × NBPSCS(iss)
NROT 58 87
Slide 6
Sun Bo, ZTE Corp

7. References
[1 ]Kaiying Lv . et al., “120MHz Channelization solution” , IEEE /1242r0
[2 ] Zhendong Luo . et al., “120 MHz PHY Transmission” , IEEE /0778r1
Sun Bo, ZTE Corp

8. Thank you!