Method and apparatus for symbol detection

A method, comprising:

• obtaining multiple-input-multiple-output symbols received over a transmission channel, the multiple-input-multiple-output symbols comprising a plurality of layers, each layer comprising a constellation point of multiple candidate constellation points;
• selecting for each layer a precision, each layer having a precision smaller or equal than a precision of a previous layer;
• searching for each layer, utilising the selected precision, of the constellation point among the multiple candidate constellation points by minimising a given cost function, utilising a plurality of Arithmetic and Logic Units, ALUs, comprising at least one real and imaginary part, the ALUs comprising real and imaginary part having different precisions by having different number of bits, the data memory and the plurality of ALUs being connected with each other by a data bus of a given width.

A non-transitory computer medium comprising instructions for causing an apparatus of a communication system to perform at least the following:

• obtaining multiple-input-multiple-output symbols received over a transmission channel, the multiple-input-multiple-output symbols comprising a plurality of layers, each layer comprising a constellation point of multiple candidate constellation points;
• selecting for each layer a precision, each layer having a precision smaller or equal than a precision of a previous layer;
• searching for each layer, utilising the selected precision, of the constellation point among the multiple candidate constellation points by minimising a given cost function, utilising a plurality of Arithmetic and Logic Units, ALUs, comprising at least one real and imaginary part, the ALUs of the apparatus comprising real and imaginary part having different precisions by having different number of bits, the data memory and the plurality of ALUs being connected with each other by a data bus of a given width.