Iterative detection for V-BLAST MIMO communication systems based on expectation maximisation algorithm - Electronics Letters

System description: Consider the system of N transmit and M receive antennas. The single data stream in the input is demultiplexed into N substreams, and each substream is modulated independently then transmitted over a rich-scattering wireless channel to M antennas. Each antenna receives signals transmitted from the entire N transmit antennas. The transmission is performed by burst of length l. We adopt a quasi-static approximation of the fading channel, i.e. the channel remains unchanged during each burst. For simplicity of presentation, we consider a BPSK modulation for each layer. The received signal at each instant time can be written as