Comments on: Quiz on IEEE 802.11a specifications

By: Krishna Sankar

Krishna Sankar — Mon, 09 Aug 2010 23:55:33 +0000

@preet: Plz use the IEEE specifications @ http://standards.ieee.org/getieee802/download/802.11a-1999.pdf

By: preet

preet — Wed, 04 Aug 2010 06:22:49 +0000

please tell how to calculate all the parameters of IEEE 802.11a specification,

By: Krishna Sankar

Krishna Sankar — Mon, 02 Aug 2010 00:52:04 +0000

@preet: Synchronization is quite an involved issue. Need to fidn algorithms for frequency/phase and time synchronization. Have brief post on frequency offset estimation in OFDM
http://www.dsplog.com/2008/03/03/frequency-offset-estimation-using-80211a-short-preamble/

By: preet

preet — Sat, 31 Jul 2010 17:11:52 +0000

can you sujjest any method for solving sunchronization problem in ofdm,,,,,

By: Krishna Sankar

Krishna Sankar — Mon, 12 Oct 2009 23:58:59 +0000

@Sudeep: For the 802.11g (ERP-PHY, see clause 19.4.7.2 in IEEE 802.11-2007 specifications), the tolerance specified is +/-25ppm. So the maximum frequency offset comes around to 2.5GHz * 50ppm = 125kHz.

By: Sudeep

Sudeep — Mon, 12 Oct 2009 03:11:01 +0000

Regarding frequency offset tolerance, does it mean for 802.11g, this figure needs to be only around 100 KHz ~(2.4*40)? Or does the tolerance become +/- 40ppm in that case?

By: Krishna Sankar

Krishna Sankar — Thu, 08 Oct 2009 00:36:22 +0000

@Sudeep: Thanks for noticing it. I corrected.