1. A method of detecting transmit sequences of digitally modulated transmit symbols, said transmit symbols being transmitted as digitally modulated symbols by multiple transmitting sources and received by multiple receiving elements, whereby said multiple transmitting sources and said multiple receiving elements jointly define a transmission channel modelled by a channel state information matrix and said received symbols are grouped as a received vector, wherein the method includes: a) selecting a transmitting source as a reference layer, wherein the associated transmit symbol represents a reference transmit symbol, b) processing said channel state information matrix, in order to factorize said channel state information matrix into a product of matrices of which at least one is a triangular matrix, c) identifying a set of candidate values for said reference transmit symbol out of all possible modulated symbols, d) determining a respective candidate transmit sequence for each said candidate value, e) calculating a respective metric for each said candidate transmit sequence, and wherein said determining for each candidate value a respective candidate transmit sequence includes: f) estimating for each said candidate value a candidate transmit sequence through a spatial decision feedback equalization process, wherein the candidate transmit symbols for the layers other than said reference layer are determined on a bit-by-bit basis as a function of said candidate value for said reference transmit symbol and the estimated transmit symbols selected previously for the layers not being said reference layer.