A wireless device at least demodulates, descrambles and decodes a first control signal to generate a first signal. The wireless device processes the first signal by at least encoding, scrambling, modulating and scaling the first signal. The wireless device subtracts the processed first signal from received signals to generate a second signal. The wireless device at least demodulates, descrambles and decodes the second signal to generate a physical broadcast message. The wireless device determines a plurality of system parameters of a base station employing the physical broadcast message.