Precoder for spatial multiplexing, multiple antenna transmitter

A transmitter (100) for transmitting spatially precoding data in a channel independent way comprising:

• a transmit controller (110) configured to determine a transmission rank of said communication channel and to select a set of one or more precoding filters (124) derived from a single generator matrix based on said transmission rank;
• and
• a transmit signal processor (120) including a precoder (124) configured to precode said data for transmission using said precoding filters in a predetermined order according to a predetermined precoding sequence, thus using different ones of said precoding filters in different precoding intervals of a predetermined precoding period of the predetermined precoding sequence.

The transmitter (100) of claim 11 wherein the distance criterion comprises at least one of chordal, projection two-norm, or Fubini-Study distance.

A receiver for receiving spatially precoded data, precoded in a channel independent way, said method comprising:

• a receive controller (210) configured to determine a transmission rank applied at a transmitter (100) and to select a set of one or more combining filters (224) derived from a single generator matrix based on said transmission rank;
• and
• a receive signal processor (220) including a combiner (124) configured to combine said spatially precoded data using said combining filters in a predetermined order according to the predetermined combining sequence, thus using different ones of said combining filters in different combining intervals in a predetermined combining period of the predetermined combining sequence.