Patent ID: 8724753

Claim:
A spectrum sensor for cognitive wireless communication which is provided in a cognitive wireless communication system comprising a wireless communication device capable of making cognitive wireless communication and is directed for sensing spectra in multiple frequency bands, comprising: a controller for controlling an operation mode to switch between a spectrum sensing mode in which the spectra are sensed and a communication mode in which communication is made with the wireless communication device during one symbol period of an ultra-wideband physical layer; a first integrator and a second integrator into which external wireless signals are input in parallel; a code inverter for inverting an output value of the second integrator; a first adder for adding an output value of the first integrator and the output value of the second integrator inverted by the code inverter; a first determination device connected to the first adder in series; a second adder for adding the output value of the first integrator and the output value of the second integration value not inverted by the code inverter; and a second determination device connected to the second adder in series, wherein the controller causes the first determination device to make a determination by use of the output value of the first adder when the operation mode is the communication mode, and causes the second determination device to make a determination by use of the output value of the second adder when the operation mode is the spectrum sensing mode.