It took a whole day. Each session 45 min with two persons. Mainly technical questions. The bar is pretty high and you'll need to be very clear about what you have in your resume. Also be prepared about the basics of the WLAN communications.
Average interview
Application
I applied online. The process took 1 week. I interviewed at Broadcom
Interview
First a phone screening with a few technical questions, then onsite to meet the whole team.
The interview was very technical but they still asked a few behavioral questions. No questions about the standard just on the fundamentals.
Interview questions [1]
Question 1
Basic comm and signal processing questions. Main topics: basic DFT, OFDM, PARR reduction, water filling power curve, MIMO signalling and space time codes.
I applied through an employee referral. The process took 3 weeks. I interviewed at Broadcom in Jan 2013
Interview
a phone interview by one of the team members , followed by an on-site interview with 6-8 team members, 45 minutes each mostly technical. Then followed by a call from the talent acquisition recruiter for a salary/offer confirmation and/or negotiations.
Interview questions [1]
Question 1
Basic RF, signal processing, communication, probability