My new driver has many options I've never heard of

There are quite a few new options for a driver I got for my Ubiquiti card, but some are cryptic or comepletely unknown to me. I'd like to be able to tweak it, so if anyone knows what some of these do.. i'd appreciate it.

11d Mode switch
Background scan
Background scan max deferral
Bss Aging period
Calibration period
clear list on scan
Country Code -> which country doesn't inhibit ANY settings
No Beacon timeout
Roaming rates
Roaming Rssi's
Scan time pre-sleep
scan type -> what the difference between passive and active
Scan interval
sleep time post-scan