Frequency-independent spatial processing for wideband MISO and MIMO systems
First Claim
1. A method of performing spatial processing in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
- obtaining a plurality of channel response matrices for a channel response of a MIMO channel in the MIMO system;
computing a correlation matrix for the MIMO channel based on the plurality of channel response matrices; and
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.
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Abstract
Frequency-independent eigensteering in MISO and MIMO systems are described. For principal mode and multi-mode eigensteering, a correlation matrix is computed for a MIMO channel based on channel response matrices and decomposed to obtain NS frequency-independent steering vectors for NS spatial channels of the MIMO channel. ND data symbol streams are transmitted on ND best spatial channels using ND steering vectors, where ND=1 for principal mode eigensteering and ND>1 for multi-mode eigensteering. For main path eigensteering, a data symbol stream is transmitted on the best spatial channel for the main propagation path (e.g., with the highest energy) of the MIMO channel. For receiver eigensteering, a data symbol stream is steered toward a receive antenna based on a steering vector obtained for that receive antenna. For all eigensteering schemes, a matched filter is derived for each receive antenna based on the steering vector(s) and channel response vectors for the receive antenna.
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Citations
1 Claim
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1. A method of performing spatial processing in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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obtaining a plurality of channel response matrices for a channel response of a MIMO channel in the MIMO system;
computing a correlation matrix for the MIMO channel based on the plurality of channel response matrices; and
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.
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Specification