Studies show that there are Three types of transmitter detection techniques in spectrum sensing in a cognitive radio system these include: matched filter, energy detection and cyclostationary featured detection technique.... this matlab code is for the signal emernating the transmitter.-Studies show that there are Three types of transmitter detection techniques in spectrum sensing in a cognitive radio system　these include: matched filter, energy detection and cyclostationary featured detection technique.... this matlab code is for the signal emernating　the transmitter.