In one disclosed embodiment, an input bit stream is supplied to a trellis code block. For example, the trellis code block can perform convolutional coding using a rate 6/7 code. The output of the trellis code block is then modulated using, for example, trellis coded quadrature amplitude modulation with...http://www.google.de/patents/US7881360?utm_source=gb-gplus-sharePatent US7881360 - Method and system for increased bandwidth efficiency in multiple input—multiple output channels
