Patent ID: 8432988

Claim:
A method for operating in a wireless communications system, the wireless communications network having a controller and a mobile device, the method comprising: estimating a communications channel between the controller and the mobile device, thereby producing a channel estimate; parameterizing the channel estimate with principal angles, thereby producing principal angle vectors Θ and Φ; quantizing the principal angle vectors, thereby producing quantized values, wherein quantizing the principal angle vectors is performed without using a codebook; and transmitting the quantized values to the controller, wherein quantizing the principal angle vector comprises quantizing the principal angle vectors with a uniform quantizer over interval [0 π), and, wherein the quantized values are expressible as: θ ^ k = ⌊ θ k ⁢ N θ π + 0.5 ⌋ ⁢ π N θ , 1 ≤ k ≤ M - 1 φ ^ k = ⌊ φ k ⁢ N φ π + 0.5 ⌋ ⁢ π N φ , where N θ =2 L θ and N φ =2 L φ , L θ and L φ , are the number of quantization bits for the principal angle vectors.