Via this site, which reports:
WKRP is back on the air in Cincinnati — but this time it’s for real.
A low-power TV station has changed its call letters to WKRP, the same as the fictional radio station in the 1970s hit series “WKRP in Cincinnati.”
The station changed its call letters to promote its new digital TV signal. It formerly went by WBQC-TV.
General Manager Elliott Block says the new call letters give the station recognition because so many people remember the television sit-com.
I think it’s likely people will be confused. But I’m not sure there is a Lanham Act problem. What sayeth the trademark law geeks?