摘要
本文针对目前兴起的宽带无线接入而设计了一种DQPSK调制解调具体实现方案.该方案大部分功能在可编程数字电路中设计完成,仅模数转换和正交乘法器功能由专用芯片实现.它可以改变发送端的发射频率(初步设计为100KHZ～250KHZ),且处理数据的速度高达10MBITPS,包含了全数字动态跟踪的位同步系统,易于根据需要灵活更改为16QAM调制方式,实际工作时可根据具体性能要求重新配置各部分芯片,因而具有很高的灵活性,应用范围广泛.
A method for design and realization of fast DQPSK is proposed in this paper for broad band wireless access. Most of the functions of the DQPSK are designed in CPLD. Only the A/D and the Quadratural Multiplier are imolemented in special integrated chips. The frequencies of the carrier at the sending terminal can be adjusted aebitrarily The default is 100250 MHz). The data processing speed can be high up to 10 Mbps, the bit synchronic system of digital dynamic tracing is included, the modulation can be easily altered to 16QAM if needed. The chips can also be rearranged if some other demands are needed in practice. the fast DQPSK designed by our method, therefore, is highly flexible. It can be used in a wide range of applications.
出处
《成都大学学报（自然科学版）》
2003年第3期8-13,共6页
Journal of Chengdu University（Natural Science Edition）
