Patent ID: 7693113

Claim:
A method for determining a hermetian of a system response matrix of a receiver receiving multiple communication bursts, the bursts comprising channel codes, the method comprising: sampling a received communication burst; convoluting the sampled chip values of the communication burst with approximate channel codes; storing a real channel response and an imaginary response in a first register and a second register respectively, the real channel response and the imaginary channel response being results of the convolution; obtaining an imaginary portion and a real portion of the real channel response and an imaginary portion and a real portion of the imaginary channel response by adding/subtracting even locations of the first and second registers respectively and odd locations of the first and second registers respectively; obtaining an imaginary part of a contribution to the system response matrix due to the burst by combining the imaginary portion of the real channel response and the imaginary portion of the imaginary channel response; and obtaining a real part of a contribution to the system response matrix due to the burst by combining the real portion of the real channel response and the real portion of the imaginary channel response.