Biomedical Engineering Reference
In-Depth Information
Table 2
Modulation and coding schemes with respective proposed data rates in 802.11ad
specification for single carrier SC and OFDM PHY. [
28
]
SC PHY
OFDM PHY
MCS
index
Modulation
Code rate
Data rate
(Mbps)
MCS
index
Modulation
Code rate
Data rate
(Mbps)
π
1
/2-BPSK
1/2
385
13
SQPSK
1/2
693.00
π
2
/2-BPSK
1/2
770
14
SQPSK
5/8
866.25
3
π
/2-BPSK
5/8
962.5
15
QPSK
1/2
1,386.0
4
π
/2-BPSK
3/4
1,155
16
QPSK
5/8
1,732.5
5
π
/2-BPSK
13/16
1,251.2
17
QPSK
3/4
2,079.0
6
π
/2-QPSK
1/2
1,540
18
16-QAM
1/2
2,772.0
7
π
/2-QPSK
5/8
1,925
19
16-QAM
5/8
3,465.0
8
π
/2-QPSK
3/4
2,310
20
16-QAM
3/4
4,158.0
9
π
/2-QPSK
13/16
2,502.5
21
16-QAM
13/16
4,504.5
10
π
/2-16QAM
1/2
3,080
22
64-QAM
5/8
5,197.5
11
π
/2-16QAM
5/8
3,850
23
64-QAM
3/4
6,237.0
12
π
/2-16QAM
3/4
4,620
24
64-QAM
13/16
6,756.7
beamforming is mandatory, while Type B devices may receive beamforming training
of Type A devices in order to specify optimal antenna weight vector.
In 2006, WirelessHD consortium was founded by a number of key consumer
electronics companies with the task of delivering specification for uncompressed
audio/video streaming based on 60-GHz radios.
Summarizing, the latest and most advanced development stage in 60-GHz stan-
dardization at this moment is 802.11ad with unified specification for 60-GHz wireless
radios creating interoperable protocols for wide range of applications and coexisting
with other 60-GHz systems: 802.15.3.c and ECMA-387 devices. In the following
section, 802.11ad will be summarized from the aspect of the most important PHY
and MAC functionalities, data rate transfer speeds and carrier allocation schemes.
The IEEE 802.11ad
The general purpose of the IEEE 802.11ad standards is to improve 802.11 user
experiences in drastically higher data rates at UB (ultra band) frequencies from 57
to 66 GHz. The IEEE 802.11ad PHY defines specification for both single-carrier
referred to as SC PHY and multi-carrier channel multiplexing referred to as OFDM
PHY [
28
].
Modulation and coding schemes (MCSs) available for usage are represented with
indexes from 1 to 24 where MCS indices from 1 to 12 define single-carrier transmis-
sion while MCS indexes from 13 to 24 are dedicated to OFDM-based transmissions.
Table
2
contains detailed MCSs and recommended modulation and code rates for SC
PHY and OFDM PHY with corresponding achievable data rates for different MCSs.
802.11ad also defines optional modulation and coding schemes for low-power
transmission based on single-carrier channel with limited data rates up to 2.5 Gbps
(low-power SC PHY). This mode can provide drastically lower processing power by
Search WWH ::
Custom Search