Detection of frequency correction bursts and the like

A non-transitory machine-readable storage medium, having encoded thereon program code, wherein, when the program code is executed by a machine, the machine implements a method for detecting a burst in a complex input signal, the method comprising:

• (a) applying the complex input signal to one or more correlation paths, each correlation path:
• (1) generating first and second copies of the complex input signal, where there is a delay between the first and second copies of the complex input signal;
• (2) generating a complex conjugate of the second copy of the complex input signal;
• (3) multiplying the first copy of the complex input signal and the complex conjugate of the second copy of the complex input signal to generate a correlation signal;
• and
• (4) applying a correlation filter to the correlation signal to generate a corresponding filtered correlation signal;
• (b) generating a combined correlation signal from the one or more filtered correlation signals from the one or more correlation paths;
• and
• (c) applying peak detection processing to the combined correlation signal to detect a peak indicative of the burst in the complex input signal, wherein each correlation filter is designed such that the peak in the combined correlation signal occurs prior to termination of the burst.

A burst detector for detecting a burst in a complex input signal, the burst detector comprising:

• one or more correlation paths, each correlation path adapted to:
• (1) generate first and second copies of the complex input signal, where there is a delay between the first and second copies of the complex input signal;
• (2) generate a complex conjugate of the second copy of the complex input signal;
• (3) multiply the first copy of the complex input signal and the complex conjugate of the second copy of the complex input signal to generate a correlation signal;
• and
• (4) apply a correlation filter to the correlation signal to generate a corresponding filtered correlation signal;
• and
• a peak detector adapted to apply peak detection processing to a combined correlation signal generated from the one or more filtered correlation signals from the one or more correlation paths to detect a peak indicative of the burst in the complex input signal, wherein each correlation filter is designed such that the peak in the combined correlation signal occurs prior to termination of the burst.