FPGA Central

Greetings,

Can anyone tell me - or better still direct me to some code for convertin
PARtial CORrelation coefficients derived from the Schurr recursion int
Line Spectrum Pairs?

I can't find it in my literature!

Ed

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edkelly wrote:
> Greetings,
>
> Can anyone tell me - or better still direct me to some code for converting
> PARtial CORrelation coefficients derived from the Schurr recursion into
> Line Spectrum Pairs?

You need to use what Hayes calls the "step-up" recursion to compute the
AR model coefficients a_k, 0<=k<=p. There is Matlab code for this on
Hayes' website:

http://users.ece.gatech.edu/~mhayes/stat_dsp/lev_m.html

Once you have the AR coefficients, you get a line spectrum by taking
their DFT and computing the point-wise complex inverse. You can control
the line spacing by zero-padding the coefficient vector.