Method and System for Subspace Beamforming for Near Capacity Multiple Input Multiple Output (MIMO) Performance

摘要

Aspects of a system for subspace beamforming for near capacity MIMO performance may include a MIMO transmitter that computes one or more rotation angle values (θ_f) based on a channel estimate matrix (H). In instances when each rotation angle is computed based on a Euclidean distance criterion, each value θ_f may also be computed based on a computed Euclidean distance. Alternatively, in instances when each rotation angle is computed based on a bit error rate (BER) criterion, each value θ_f may also be computed based on a signal noise power level (N₀). A plurality of spatial stream signals (x_i) may be generated utilizing one or more constellation types. The constellation map for each constellation type may be rotated based on a corresponding value θ_f. A plurality of transmit chain signals (tx_i) may be generated based on the signals x_i and transmitted via a communication medium characterized by matrix H.