In view of the difficulties of black box or other missile-borne recording equipment in searches

this paper proposes a BPSK modulation-based design for radio beacon machines.This design selects u-blox GPS NEO-5Q module for self positioning and DDS chip AD9910 for HF BPSK modulation and then emits the beacon data frame at a certain frequency band via an RF circuit board.Actual measurement shows that this design can obtain BPSK modulated signals with the output power of up to 1.9 mW at over 400 MHz.Using the idea of software radio

this design implement various function of radio stations by software and has features of flexibility and openness.