Systems and techniques relating to processing multiple data streams include, according to an aspect, a method including interleaving data streams to be transmitted over a wireless channel, wherein the interleaving comprises performing a first permutation and a second permutation, and applying data rotations to the data streams in connection with the interleaving, wherein each of the data rotations has a constant rotation value for its corresponding stream index regardless of how many data streams are currently being transmitted, a second rotation value used for a second stream is larger than a first rotation value used for a first stream, a third rotation value used for a third stream is greater than the first rotation value but less than the second rotation value, and a fourth rotation value used for a fourth stream is greater than the second rotation value, and wherein the data rotations are applied after the second permutation.