Coded OFDM, interleaving, sensitivity, and narrow band interference
A strong inband carrier may be strong enough to overload the frontend Low Noise Amplifier transistor, and prevent ANY of the OFDM passing thru.

On the other hand, dropping the desired signal and the inband carrier/jammer by 20/30//50/80 dB  should just impair that one channel of the large number used by the OFDM. 

If there is enough interleaving, despite the low-coding gain (such as Viterbi 7/8, not 1/2), then you may succeed. If you expect big problems, you might employ handshaking at various times, and upon TX/RX agreement switch from 7/8 to 1/2 when interference requires that for a viable signal.