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Re: [Discuss-gnuradio] FIR filters and set_history()

From: George Nychis
Subject: Re: [Discuss-gnuradio] FIR filters and set_history()
Date: Wed, 06 Feb 2008 13:01:36 -0500
User-agent: Thunderbird (X11/20071022)

George Nychis wrote:
Using the FIR with time reversed complex conjugate of the desired input signal:

Using the "matched filter block" that uses the complex/real-wise inner product:

The FIR filter method seems to have much better properties, creating a much larger magnitude in the output.

This is probably a much better comparison:

The difference between what I would consider the maximum noise level of the inner product method and the correlation peak is: 160-45=115

For the FIR filter, 225-75=150.

Just approximations.

- George

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