Wake up radio device, circuit configuration, and method

@PATENT{Dorrance2018:US9967820,
    author    = {Dorrance, Richard and Park, Minyoung and Min, Alexander W. and Sheikh, Farhana},
    title     = {{Wake up radio device, circuit configuration, and method}},
    year      = {2018},
    month     = {May},
    day       = {8},
    number    = {US 9,967,820},
    type      = {Patent},
    location  = {US},
    gpatentid = {US9967820},
    abstract  = {According to the present disclosure, a communication device configured to power on a main receiver to receive data from a network includes: a low power receiver configured to receive a wake up packet, including a preamble, from the network and oversample the wake up packet; a circuit arrangement including: a correlator configured to correlate the oversampled portion of the preamble; 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; and a packet parser configured to check the demodulated data for a data set in order to selectively output a nonzero signal to power on the main receiver.},
    url       = {}
}