A signal reception apparatus of an orthogonal frequency division multiplexing communication system using a multiple input, multiple output scheme. The method includes determining whether decoding candidates for enhanced control channel resource sets overlap. The digital signal processor calculates the Fourier transform of sampled output signals from the transducers to produce a plurality of sound wave components specifying the sound field. The cathode and anode of the third diode are respectively connected to the first input terminal and the second output terminal. The catalase enzyme can catalyze the reaction of peroxide to oxygen. The processor is characterized in that the interface engine is adapted to receive a request from the programmable pipeline, to send to the external device a request output, based on the request, and to send to the pipeline a response to the request.