Integer-Forcing Linear Receivers: A New Low-Complexity MIMO Architecture

The authors propose a new framework for MIMO decoding based on a recently developed technique for reliably conveying linear equations over wireless channels. Each transmits antenna sends an independent data stream using the same linear code. As a result, any integer combination of the code-words is itself a codeword. Each receive antenna observes a random complex-valued combination of the code-words according to the fading coefficients. They use a linear pre-processing step at the receiver to transform the effective channel into a (full-rank) integer matrix. A single stream decoder is then used to recover integer combinations of the code-words.