when doing subband, you get the signal in complex value, and you do lms in complex value, when you reconstruct the complex e back to full-band e, how will you get real value back? or just take magnitude? Lee
complex lms
Started by ●September 21, 2003
Reply by ●September 23, 20032003-09-23
This is in response to the original post, but this seems to be the only place google would let me reply. If x is complex then ex will still be complex so dropping the conjugate wouldn't help. The conjugate is needed for the complex operations to form proper inner products. Although the product ex* will in general be complex, the expected value E[ex*] will still go to zero (0+j0) - since the lms update has this form it must go to zero otherwise the coefficients would never stop adapting. Although if you are consistent it really doesn't matter where you put the conjugate, it is specified by properties of the inner product. I don't think the complex lms is readily obtained because the complex conjugate is not analytic. Matt leeshauyao@hotmail.com (Leeshauyao) wrote in message news:<fe7ef1c9.0309211656.7a02bded@posting.google.com>...> when doing subband, you get the signal in complex value, and you do > lms in complex value, when you reconstruct the complex e back to > full-band e, how will you get real value back? or just take magnitude? > > Lee