you can add these parameters to your wifi:
kate /etc/modprobe.d/wifi.conf
and put there this:
options iwlwifi 11n_disable=1 swcrypto=0 bt_coex_active=0 power_save=0
options iwlmvm power_scheme=1
options iwlwifi d0i3_disable=1
options iwlwifi uapsd_disable=1
options iwlwifi lar_disable=1
save it, reboot and test