Using the embedded software defined radio platform USRP E110, a wireless communication system which uses binary phase shift keying (BPSK) as the modulation method is implemented for portable wireless communication applications. In this system，the ARM processor acts as the processing core, implementing all baseband signal processing; FPGA(field programmable gate array) and radio frequency daughter board act radio frequency frontend, where digital up convert or digital down convert and the transition between the IF signal and the radiofrequency signal are implemented on; and GNU radio acts as the software development platform, implementing the base band signal processing in the form of a flow graph, such as scrambling and perturbation, BPSK modulation and demodulation. The results show that, the system can transmit and receive data using various parameters such as RF frequency, transmitted power and so on, which is portable and low power.