Wake up radio device, circuit configuration, and method

A circuit arrangement comprising:

• a correlator configured to correlate an oversampled portion of a preamble of a wake up packet;
• a delay and adder configured to take an output of the correlator, delay the output of the correlator, and add the output of the correlator back onto itself to produce a delay output;
• a peak detector configured to detect a peak pattern in the delay output;
• a demodulator configured to calculate a decoding threshold value to produce a demodulated data of the wake up packet;
• and
• a packet parser configured to check the demodulated data for a data set in order to selectively output a nonzero signal.

A method for a communication device to power on a first receiver, comprising:

• receiving a wake up packet at a second receiver of the communication device, the wake up packet comprising a wake up preamble with a pseudorandom noise (PN) sequence, a receiver ID, a payload, and a frame check sequence (FCS);
• determining whether the wake up packet should be decoded based on the wake up packet;
• using the PN sequence to set a decoding threshold;
• decoding the receiver ID, the payload, and the frame check sequence using the decoding threshold;
• and
• selectively sending a signal to power on the first receiver.

A method in a first device to transmit a wake up packet to a second device, comprising:

• coding a wake up preamble portion of the wake up packet, wherein the wake up preamble comprises a repeated pseudorandom noise (PN) sequence;
• coding a data portion of the wake up packet, wherein the data portion comprises a receiver ID, a payload, and a frame check sequence;
• and
• transmitting the wake up packet to the second device.