Wireless Networking Questions

I am a self-taught amateur eager to learn as much as possible about wireless technologies. Any questions to the following or other learning resource suggestions are greatly appreciated!

1. What are the basic modulations of LTE, 802.11, & WiMax? I know all modulation is either AM, FM, or PM but I do not know which technology uses which. What are their respective coding techniques? For example, does 802.11 combine Phase Modulation with Quadrature-amplitude shift keying? Which combinations of encoding and keying are the 'best', ie result in the most efficient use of data transmission over physical medium?

2. Do Wireless Intrusion Detection Systems exist for LTE microcells/picocells ? Do picocells broadcast beacon frames in the same fundamental way as 802.11 WAPs? In general, how does authentication differ between 802.11 and LTE? What is the LTE equivalent of an SSID?

3. Are there commercial Access Points/picocells have some sort of modular capability to support other frequencies and technologies (ie, are there 802.11 WAPs that could easily support LTE bands?)

4. Is there some table out there of current theoretical maximum data bandwidth to distance for each group of frequencies?

5. Are there other factors besides coding and keying that significantly influence bandwidth performance, such as actual packet structure? How does an LTE packet compare to an 802.11 packet? Does one have a more efficient header than another, whatever that would mean?

6. How do LTE, 802.11, and WiMax all compare with respect to QoS? I am referring specifically to prioritzation handling of voice and video jitter.

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And a few other completely unrelated networking questions that have been keeping me up at night:

1. Is it possible to route between layer 2/layer 3 protocols and USB? How do USB hubs work, and can they do switching by providing some sort of addressing information? Is there any difference between a USB port and an IP port insofar as routing is done? In principle there is nothing specific about USB I am interested in, you could equally replace USB with serial/parallel ports. Basically I am wondering if there is some way to translate peripheral port technologies to layer 2/3 protocols and how that is handled. Also, is there a way to 'manage' USB traffic (ie drop, queue, log, etc).

Much thanks!