What is WiGig? OR WLAN-ad Brief
IEEE WLAN 802.11-ad is 802.11 family of standard for WLAN ( Wireless Local Area Networks) It has following features compare to its previous WLAN standard devices operating in 2.4GHz and 5 GHz bands.
WiGig is the name given by IEEE engineers and Wireless Gigabit Alliance for marketing reasons for products as per IEEE 802.11ad standard. This standard based devices operates in 60 GHz band and hence it is often referred as microwave wifi.
This standard is developed for very high speed throughput at shorter distances. This is evident as path loss is higher at this high microwave frequency. There are 4 channels supported in this WiGig standard. They are 58.32 GHz, 60.48 GHz, 62.64 GHz and 64.80 GHz. All the channels support 2.16 GHz wide bandwidth to provide higher data rate. Different regions support different radio frequency allocations for WiGig based devices.
Various Physical layer configurations are supported in IEEE 802.11ad standard. Hence various modulation and coding techniques are available based on channels of use. The physical layer configurations are control PHY, single carrier PHY, Low power single carrier PHY and OFDM PHY. The typical modulation techniques employed here are π/2 DBPSK, π/2 BPSK, π/2 QPSK, π/2 16QAM, OFDM-SQPSK etc. LDPC technique is used as forward error correction technique.
Following table summarizes the features of WiGig Standard i.e. WLAN 802.11ad standard.
|Specifications||802.11ad WiGiG support|
|RF Carrier Frequency||operates at 60 GHz unlicensed band with different allocations from 57GHz to 66 GHz in different regions of the world|
|Channel bandwidth||About 2.16 GHz|
|Data rate/Data throughput||7 Gbps|
|Distance coverage||About 1 to 10 meters|
|Data symbol modulation||Single carrier/OFDM|
|MAC layer||Should support switching from existing 60 GHz Wigig to previous 2.4 GHz /5 GHz Wifi networks|
WLAN-ad Test and Measurement Solution providers
There are various test and measurement solution providers for WiGig 802.11ad compliant devices.
Following are the popular among them.
• R&S, http://www2.rohde-schwarz.com/
• WLAN 802.11ad test solutions from Agilent, http://www.agilent.com
WLAN-11ad Tutorial and 11ad PHY layer
What is Difference between
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
Difference between 11-n,11-ac and 11-ad
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
OFDM vs OFDMA