Space-frequency equalization for oversampled received signals

A method comprising:

• combining signal components across spatial and frequency dimensions for at least a first frequency bin k1 of a given copy of a received signal;
• and
• combining signal components across spatial dimension for at least a disparate second frequency bin k2 of the given copy of the received signal,
• where k1 and k2 are indexes for frequency bins.

An apparatus comprising:

• means for combining signal components across spatial and frequency dimensions for at least a first frequency bin k1 of a given copy of a received signal;
• and
• means for combining signal components across spatial dimension for at least a disparate second frequency bin k2 of the given copy of the received signal,
• where k1 and k2 are indexes for frequency bins.

An apparatus comprising:

• a computer-readable medium having stored thereon computer-executable instructions executable by a processor to:
• derive equalizer coefficients for multiple signal copies obtained via multiple receive antennas and oversampling, the deriving comprising at least:
• deriving a space-frequency equalizer coefficient for a first subset of frequency bins in at least one of the multiple signal copies;
• and
• deriving a spatial equalizer coefficient for a disparate second subset of frequency bins in the at least one of the multiple signal copies;
• and
• filtering input symbols for the multiple signal copies with the equalizer coefficients.

An apparatus comprising:

• at least one processor configured to obtain input symbols for multiple (M) signal copies from multiple (R) receive antennas and multiple (C) times oversampling, where M is equal to R times C, to derive equalizer coefficients for the M signal copies, to filter the input symbols for the M signal copies with the equalizer coefficients, and to combine filtered symbols for the M signal copies, wherein R, C, and M are integers greater than one;
• and
• a memory coupled to the at least one processor,
• wherein the at least one processor derives M sets of equalizer coefficients for the respective M signal copies for each of at least one data stream, the M sets of equalizer coefficients including at least one set comprising a space-frequency equalizer coefficient used to filter a first subset of frequency bins in at least one of the M signal copies and a spatial equalizer coefficient used to filter a different second subset of frequency bins in the at least one of the M signal copies.

A method comprising:

• obtaining input symbols for multiple (M) signal copies from multiple (R) receive antennas and multiple (C) times oversampling, where M is equal to R times C;
• deriving equalizer coefficients for the M signal copies;
• filtering the input symbols for the M signal copies with the equalizer coefficients to yield filtered signals, the filtering comprising at least filtering a first subset of frequency bins in at least one of the M signal copies using a space-frequency equalizer coefficient, and filtering a different second subset of frequency bins in the at least one of the M signal copies using a spatial equalizer coefficient;
• and
• combining the filtered symbols for the M signal copies,
• where M, R, and C are integers greater than one.