Hopefully this will fix all your radar problems as it's working 50/50 for people.
Huge thanks goes out to @Nem3sis94 for providing the code .
Virus scans:
~ VirusTotal
~ Jotti
Instructions:
~ Open your Call of Duty: Ghosts directory and navigate to your players2 folder (usually C:\Program Files (x86)\Steam\SteamApps\common\Call of Duty Ghosts\players2)
~ Extract the .cfg file and create a back-up of yours that's in there
~ After backup has been created, proceed to replace this .cfg with your old one
~ Done, hopefully it's fixed