Detecting Presence/Absence of an Information Signal

A decision engine comprising:

• means for determining an expected variance of received inputs;
• and
• means for testing, using the determined expected variance of the received inputs, a first hypothesis that the inputs include an information signal to detect a presence of the information signal.

A computer program comprising computer program instructions which when loaded into a processor enable the processor to:

• determine an expected variance of received inputs;
• and
• test, using the determined expected variance of the received inputs, a first hypothesis that the received inputs include an information signal to detect a presence of the information signal.

A detector comprising:

• means for determining an expected variance of received inputs;
• and
• means for testing, using the determined expected variance of the received inputs, a first hypothesis that the received inputs include an information signal to detect a presence of the information signal.

An apparatus comprising:

• a device configured to receive inputs;
• processing circuitry, for detecting a presence of an information signal within the received inputs, configured to determine an expected variance of the received inputs and to test, using the determined expected variance of the received inputs, a first hypothesis that the received inputs include an information signal.