摘要
以FPGA器件为核心设计连续相位π/4DQPSK的调制器和解调器 ,将绝大部分功能模块由大规模FPGA内部资源来实现 ,这样既可以提高通信系统的稳定性和灵活性 ,又便于系统的集成化和小型化 .由于连续相位π/4DQPSK调制独特的相位变化 ,调制器中采用了双通道设计 ,成功实现了过渡区相位与主要区间相位的交替产生 .解调器中利用计数器控制抽样时刻 ,保证抽取出的信号值处于码元的主要区间 .
The phase continuous π/4DQPSK modulator and demodulator, which are based on the large scale FPGA, are introduced in this paper. The majority of the functions in the modulator and the demodulator are realized by FPGA resource, which can not only enhance the system’s reliability, flexibility and integration, but also reduce its size. Because of the particular phase transformation in phase continuous π/4DQPSK, double channel design is employed, generating transition phase and main phase alternately. To control the sampling time, the counter is used in the demodulator, which can ensure that the samples locate in the main phase area. The experiment results have shown that the design is feasible.
出处
《南京师范大学学报（工程技术版）》
CAS
2004年第3期41-44,48,共5页
Journal of Nanjing Normal University(Engineering and Technology Edition)
基金
江苏省科学技术厅科研基金资助项目 ( 2 0 0 10 47)
