Abstract: Multicarrier modulation has a potential of high performance in a hostile RF environment. The major obstacle is the design of an economical receiver which can separate closely spaced subchannels. This paper describes an experimental receiver designed for a narrowband personal communication service network using eight subcarriers per channel. Subcarrier detection is done by an optimized 24 point discrete Fourier transform algorithm. It operates with only 14 integer multiplication, and makes 14.4% processor load for a state-of-the-art IBM PC. Further, a brief description of the frequency control of the local oscillator by a digital processing is given.
Key words: Multicarrier modulation, subcarrier detection, Fourier transform, DFT, receiver design, radio frequency.