I would like to know if it's possible to use a Wireless card as a Wifi Booster.

I mean for example an USB wifi dongle that will filter only packets sent to or received from a single AP, and that will repeat all these packets (without being connected).

Actually it is possible to monitor a network and replay some specified packets in order to get IVs. Is it possible to do the same, but to replay any kind of packets?

I would also want to know if it will have a positive or negative impact on the client/AP.

Thanks a lot,