Frequency-independent spatial processing for wideband MISO and MIMO systems

An apparatus in a wireless multiple-input multiple-output (MIMO) communication system, comprising:

• means for obtaining a plurality of channel response matrices for a channel response of a MIMO channel in the MIMO system;
• means for computing a correlation matrix for the MIMO channel based on the plurality of channel response matrices;
• and
• means for decomposing the correlation matrix to obtain at least one steering vector for at least one spatial channel of the MIMO channel, wherein the at least one steering vector is used by a transmitting entity for frequency-independent spatial processing of a data stream sent on the at least one spatial channel associated with the at least one steering vector.

A processor readable media for storing instructions operable to:

• receive a plurality of channel response matrices for a channel response of a multiple-input multiple-output (MIMO) channel in a MIMO system;
• compute a correlation matrix for the MIMO channel based on the plurality of channel response matrices;
• and
• decompose the correlation matrix to obtain at least one steering vector for at least one spatial channel of the MIMO channel, wherein the at least one steering vector is used by a transmitting entity for frequency-independent spatial processing of a data stream sent on the at least one spatial channel associated with the at least one steering vector.

A method of performing spatial processing in a multiple-input multiple-output (MIMO) communication system, comprising:

• obtaining a plurality of channel impulse response matrices for a MIMO channel in the MIMO system, wherein the plurality of channel impulse response matrices comprise a plurality of time delays of a channel impulse response of the MIMO channel;
• computing energy of each of the plurality of channel impulse response matrices;
• identifying a channel impulse response matrix with highest energy among the plurality of channel impulse response matrices as a channel impulse response matrix for a main, path of the MIMO channel;
• computing a correlation matrix of the channel impulse response matrix for the main path;
• and
• decomposing the correlation matrix to obtain a steering vector for a spatial channel of the main path, wherein the steering vector is used by a transmitting entity for frequency-independent spatial processing of a data stream sent via the MIMO channel.

A method of performing spatial processing in a wireless communication system with a plurality of transmit antennas at a transmitting entity and a plurality of receive antennas at a receiving entity, the method comprising:

• obtaining a plurality of sets of channel response vectors for the plurality of receive antennas, one set for each receive antenna, wherein each set of channel response vectors is indicative of a channel response between the plurality of transmit antennas and one of the plurality of receive antennas;
• computing a correlation matrix for each of the plurality of receive antennas based on the set of channel response vectors for the receive antenna;
• and
• decomposing the correlation matrix for each receive antenna to obtain a steering vector for the receive antenna, wherein a plurality of steering vectors are obtained for the plurality of receive antennas and the plurality of steering vectors are used by the transmitting entity for frequency-independent spatial processing of at least one data stream sent to the receiving entity.

An apparatus in a wireless communications system, comprising:

• means for obtaining a plurality of sets of channel response vectors for a plurality of receive antennas, one set for each receive antenna, wherein each set of channel response vectors is indicative of a channel response between a plurality of transmit antennas and one of the plurality of receive antennas;
• means for computing a correlation matrix for each of the plurality of receive antennas based on the set of channel response vectors for the respective receive antenna;
• and
• means for decomposing the single correlation matrix for each receive antenna to obtain a steering vector for the respective receive antenna, wherein a plurality of steering vectors are obtained for the plurality of receive antennas and are used by a transmitting entity for frequency-independent spatial processing of at least one data stream sent to a receiving entity.

A computer-readable media for storing instructions operable to:

• receive a plurality of sets of channel response vectors for a plurality of receive antennas, one set for each receive antenna, wherein each set of channel response vectors is indicative of a channel response between a plurality of transmit antennas and one of the plurality of receive antennas;
• compute a correlation matrix for each of the plurality of receive antennas based on the set of channel response vectors for the respective receive antenna;
• and
• decompose the correlation matrix for each receive antenna to obtain a steering vector for the respective receive antenna, wherein a plurality of steering vectors are obtained for the plurality of receive antenna and are used by a transmitting entity for frequency-independent spatial processing of at least one data stream sent to a receiving entity.

A method of performing spatial processing in a multiple-input single-output (MISO) system utilizing orthogonal frequency division multiplexing (OFDM), the method comprising:

• obtaining a set of channel response vectors indicative of a channel response between a plurality of transmit antennas at a transmitting entity and a receive antenna at a receiving entity in the MISO system;
• computing a correlation matrix based on the set of channel response vectors;
• and
• decomposing the correlation matrix to obtain a steering vector used by the transmitting entity for frequency-independent spatial processing of a data stream sent to the receiving entity.