Patent Document ID: 20110188562
Application ID: 13012698
Patent Flag: 0

Claim One:
1. A computer-implemented method for extracting a characteristics response for a non-linear transmit channel, the method comprising: identifying a first input sequence, the first input sequence being N bits in length, each bit corresponding to a bit interval; identifying a second input sequence, the second input sequence equaling the ones complement of the first input sequence and also being N bits in length; deriving a first input matrix from the first input sequence, wherein the first column corresponds to the first input sequence and subsequent columns correspond to the first input sequence cyclically shifted based upon the column number; deriving a second input matrix from the second input sequence, wherein the first column corresponds to the second input sequence and subsequent columns correspond to the second input sequence cyclically shifted based upon the column number; identifying a weighting equation, the weighting equation defining a weighting value based upon an input sequence. deriving a first weighted matrix from the first input matrix, wherein the first weighted matrix values are based in part upon the weighting equation; deriving a second weighted matrix from the second input matrix, wherein the second weighted matrix values are based in part upon the weighting equation; receiving a first response sequence, the first response sequence being the output of a non-linear transmit channel to the first input sequence and wherein the first response sequence includes P samples per bit interval; receiving a second response sequence, the second response sequence being the output of the non-linear transmit channel to the second input sequence and wherein the second response sequence also includes P samples per bit interval; identifying a representation of the non-linear transmit channel based in part upon a symmetrical component, an asymmetrical component, an input sequence, a weighting factor, and a response sequence; for each sample P per bit interval, derive the symmetrical component by solving the representation of the non-linear transmit channel for the symmetrical component; for each sample P per bit interval, derive the asymmetrical component by solving the representation of the non-linear transmit channel for the asymmetrical component; derive a characteristic response of the non-linear transmit channel based in part upon the derived symmetrical components and the derived asymmetrical components.