×

Interference suppression for OFDM-based UWB communication

  • US 20050265218A1
  • Filed: 05/28/2004
  • Published: 12/01/2005
  • Est. Priority Date: 05/28/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method for suppressing interference in a time-frequency hopped, ultra wide bandwidth system, comprising:

  • receiving signals corresponding to a transmitted symbol;

    frequency demodulating the received signals;

    estimating a coefficient vector w that minimizes a cost function C

    (wn)
    =1

    k


    λ



    n-k





    k


    λ



    n-k









    wnH





    xk
    -ck


    2
    ,
    where λ

    is a weighting factor between 0, x is a vector representing the received signals, H is a frequency response of a channel used to transmit the symbol, and c is a known training symbol;

    determining a coefficient vector ŵ

    n={circumflex over (R)}n

    1
    {circumflex over (d)}n, where a correlation matrix for the received signals is R^n=1

    k


    λ



    n-k





    k


    λ



    n-k



    xk

    xkH
    ,
    and an estimate of a crosscorrelation is d^n=1

    k


    λ



    n-k





    k


    λ



    n-k



    xk

    ck*
    ;

    and combining the received signals according to c^n=1C

    (w^n)


    w^nH

    xn
    =11-w^nH

    d^n


    w^nH

    xn.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×