Regarding slide 5, fading is typically frequency selective, so some sub-carriers may be much weaker than others when the signal gets to the receiver. The data is encoded in such a way as to be detectable even if some subcarriers are missing in the receiver. Coding techniques are a very sophisticated part of the baseband DSP.
Fanny, when there are multiple receiving nodes, do the APs dynamically steer the beam to individual receivers? Or is the beam steering adjusted only occasionally to give the best comprimise for all nodes?
printed antennas are less volumetrically efficient, and more suspectible to mnoise ingress/RX problems than 3D antenna structures. Product form-factor often driver of antenna choice (along with # of radio frequeinceis to support, i.e., smartphones & tablets)
She just mentioned matching circuit. I was going to ask about that. In the docs for a zigbee transceiver it just say "matching circuit" between the antenna and the chip. Could Fanny discus this a bit more than she already did?
I might not be around for the lecture. Work is really calling, but can someone ask what is meant by 8 spatial streams for MIMO if each user is using 4 spatial streams and up to 4 users on MU - multi user? from the yesterday's lecture on slide 10? What are those 8 spatial streams referencing? Or if any of you can answer. I will look at this when I get back from the archive. Thank you!!!!
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.