| Software-defined radio technology is one of the hot research in the field of communication in recent years.It differs from the traditional radio technology in that it processes the signal in the communication process through software programming,which largely to save the system development resources and shorten our development cycle,and such communication system more convenient for us to expand the experiment later.At present,in the study of cooperative communication,amplification and forwarding are two ways of using more frequently.In this paper,we first analyze the two methods of cooperation,such as amplification forwarding and decoding forwarding,and then get the bit error rate of the forward,forward,forward,and forward mode in the case of good and poor channel conditions.Then,carry out the actual verification experiment,we together the hardware platform USRP(Universal Software Radio Peripheral)N200 and software platform GNU Radio,the traditional relay forwarding program in the software platform to achieve,in our own software platform to build data on the radio transmission.In the communication process,mainly through the USRP hardware platform to receive data and analog / digital conversion and other operations,and then the data through the Gigabit Ethernet port to the PC side of the GNU Radio software platform,the software platform for the received data Processing,this paper is mainly to study the amplification relay relay technology,the software platform designed by the communication program is: the use of BPSK modulation and demodulation mode so that the signal can better adapt to the transmission channel;the use of the LT code to improve data transmission reliability;in the relay side using the amplifier to receive the data to be amplified and then forwarded to the destination.Finally,using Matlab simulation program to do the gray effect of the histogram,through the data on the performance of the system analysis and summary the system performance. |
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