现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
21期
41-44
,共4页
m序列%同步%FPGA%DPSK
m序列%同步%FPGA%DPSK
m서렬%동보%FPGA%DPSK
m-sequence%synchronization%FPGA%DPSK
在通信系统中，同步问题是实现信号正确解调的关键技术之一。为实现同步，提出了一种基于m序列的同步方法。该方法首先对接收信号进行差分相干解调得到解调序列，然后对解调序列与本地m序列同或运算后的结果按位求和，最后通过和值与门限的比较判断是否同步。其中同或求和操作避免了复杂的相关处理过程，运算速度快并节约了硬件资源。整个过程的实现基于Xilinx公司的Spartan 6系列FPGA平台，仿真调试表明该方法能够准确同步且稳定度高。
在通信繫統中，同步問題是實現信號正確解調的關鍵技術之一。為實現同步，提齣瞭一種基于m序列的同步方法。該方法首先對接收信號進行差分相榦解調得到解調序列，然後對解調序列與本地m序列同或運算後的結果按位求和，最後通過和值與門限的比較判斷是否同步。其中同或求和操作避免瞭複雜的相關處理過程，運算速度快併節約瞭硬件資源。整箇過程的實現基于Xilinx公司的Spartan 6繫列FPGA平檯，倣真調試錶明該方法能夠準確同步且穩定度高。
재통신계통중，동보문제시실현신호정학해조적관건기술지일。위실현동보，제출료일충기우m서렬적동보방법。해방법수선대접수신호진행차분상간해조득도해조서렬，연후대해조서렬여본지m서렬동혹운산후적결과안위구화，최후통과화치여문한적비교판단시부동보。기중동혹구화조작피면료복잡적상관처리과정，운산속도쾌병절약료경건자원。정개과정적실현기우Xilinx공사적Spartan 6계렬FPGA평태，방진조시표명해방법능구준학동보차은정도고。
In the communication system,synchronization is one of the key technologies to realize the correct signal demodu-lation. To achieve synchronization,a synchronization method based on m-sequence is proposed in this paper. At first,the demod-ulation sequence is got by the differential coherent demodulation operation of the received signal;then,all bits of the result of the demodulation sequence and the local m-sequence′s with-or operation are summed;finally,the comparison of the sum value and the threshold is carried out to judge whether the synchronization is achieved. The sum of the with-or operation′s result avoids the complex relevant operation,which performs fast and save the hardware resources. The implementation of the entire process is based on the Spartan6 series′ FPGA of the Xilinx Company. The simulation results show that the method can accurate-ly realize the synchronization and has high stability.
