At that distance it is unlikely, but you may be able to achieve a small increase in upstream speed at the expense of some downstream speed.
To be more sure you could unlock the modem (assuming it is the Huawei HG612 version) & take a look at your stats that give an indication as to what is possible.
These are mine, but note the actual sync speed (Path 0) is a fair bit lower than theoretical attainable speed (Max):-
Max: Upstream rate = 4936 Kbps, Downstream rate = 31840 Kbps
Path: 0, Upstream rate = 4940 Kbps, Downstream rate = 26714 Kbps
My connection resynced for some reason last night at a lower than usual speed.
It would improve a little if I forced a resync during daylight hours today.