Patent ID: 8112038

Claim:
A telecommunication network component, comprising: a memory configured to store instructions; and a processor configured to execute the stored instructions, the instructions comprising: determining a steering vector that accounts for imperfect channel state information, and outputting the steering vector to be applied to a symbol to be transmitted, wherein the steering vector is calculated to increase a signal-to-leakage ratio, wherein: the signal-to-leakage ratio is calculated according to: γ k ⁡ ( u k ) =  h ^ k T ⁢ u k  2 + σ h 2 ⁢  u k  2 ∑ l ≠ k ⁢ (  h ^ l T ⁢ u k  2 + σ h 2 ⁢  u k  2 ) , where γ k is the signal-to-leakage ratio, u k is the steering vector, ĥ k is a k'th channel assuming error in channel, ĥ l is other channels that are not the k'th channel, and σ h is a variance of the error in the channel.