The SDR(Software-defined Radio), which can change the operation of digital-communications equipment by software, is proposed to adapt to various communication protocols. In this research, it's assumed that on-chip multiprocessor system is used as hardware platform of software radio system since base-band processing of digital communication in real time requires high calculation capabilities,' Therefore we developed the simulator which can run on single CPU computer using C language and we investigated to enable parallel processing of the 8k point FFT by two or more virtual processors. To propose a method for fast processing of FFT on on-chip multi-processor system, we inspected the differences of processing speed by number of MPU and bottle-neck of system.
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