You need to build roughly two blocks high to achieve this, and place the receiver around 3 - 4 blocks away from the antennas on the same altitude (no higher than each other). You'll be 3 antennas in all. Place them around 3 blocks away from each other (give or take) to connect them all to the receiver. I'd recommend using the battery sparingly, as it took me around several minutes to get to the location, and I ran through a few battery. Taking in and out MIGHT be effective. Also, don't abandon your raft at the end. Anchor up. The wind can push you back and away, so be careful.

For further insight, watch the video. :3