GMSK扩频调制信号解调解扩技术及实现.pdf

50 5 Vol . 50 No. 5 2010 5 Telecommunication Engineering May 2010 : 1001- 893X( 2010) 05- 0051- 05 GMSK 扩频调制信号解调解扩技术及实现 梁先明 ( , 610036) : 分析并比较了两种GMSK 软扩频调制解扩解调原理和方法, 介绍了硬件实现中一些节省FP GA 资 以及帧头判决的技巧和方法, 最后在FPGA 中实现和硬件验证了算法, 结果证明该方法能够 完全取代传统的声表面波( SAW) 匹配滤波器方法 : 突发通信; GMSK; 扩频调制; 解扩; 软扩频 :TN76 : TNA doi: 10. 3969/ . issn . 1001- 893x. 2010. 05. 011 Realization of Demodulation and Despread Technology for GMSK Spread Spectrum Signal LIAN G X ianming ( Southwest China Institute of Electronic Technology, Chengdu 610036, China) Abstract:The principles and methods of two demodulation and despread technology for tamed spread spectrum GMSK modulat ion are analysed and compared.T hen, the skills to save FPGA resource and detect frame are intro duced in hardware design. Finally, the arithmetic is implemented in FPGA and verified by hardware.The result shows the method is feasible and can replace SAW( Surface Acoustic Wave) matched filter method. Key words:burst communication; GMSK ; spread spectrum modulation; despread; tamed spread spectrum , JT IDS 1 Link16( EPLRS) GMSK GMSK , ( , [ 1] 75% ) , [ 3] , ,