1. A receiver apparatus, comprising: a first receiver having an input configured to receive a first version of a signal received by a first receive antenna; a second receiver having an input configured to receive a second version of the signal received by a second receive antenna; a first maximum ratio combiner configured to receive the first version of the signal, and output a first stream of constellation symbols based thereon; a second maximum ratio combiner configured to receive the second version of the signal, and output a second stream of constellation symbols based thereon, wherein the first receiver comprises a first constellation demapper configured to demap the first stream of constellation symbols generated in the first maximum ratio combiner into a first soft decision bitstream; wherein the second receiver comprises a second constellation demapper configured to demap the second stream of constellation symbols generated in the second maximum ratio combiner into a second soft decision bitstream; and a combiner configured to combine the first soft decision bitstream and the second soft decision bitstream to provide a combined soft decision bitstream.