Blind bandwidth detection for a sample stream

Details Blind bandwidth detection for a sample stream Blind bandwidth detection for a sample stream

2005-11-21

2009-11-24

Ahn, Sam K (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

Reexamination Certificate

active

07623599

ABSTRACT:
A method for determining a bandwidth of a complex valued sample stream may include correlating a first portion of a preamble symbol of the complex valued sample stream with a second portion of the preamble symbol to generate a time autocorrelated portion. The method may further include transforming the time autocorrelated portion to generate a frequency diverse autocorrelated portion. The method may further include determining a first phase variance over a first region of the frequency diverse autocorrelated portion, wherein the first region has a first bandwidth. The method may further include determining a second phase variance over a second region of the frequency diverse autocorrelated portion, wherein the second region has a second bandwidth greater than the first bandwidth. The method may further include determining the bandwidth of the complex valued sample stream by comparing the first phase variance with the second phase variance.

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