| 差分编码OQPSK调制解调器设计 |
| |
| 作者姓名： | 刘圣慧 连全斌 杨继松 |
| |
| 作者单位： | 哈尔滨工业大学深圳研究院 深圳518057
(刘圣慧，连全斌)，哈尔滨工业大学深圳研究院 深圳518057(杨继松) |
| |
| 基金项目： | 国家 8 63项目资助 (批准号为 2 0 0 2 AA716111) |
| |
| 摘 要： | OQPSK调制性能大大优于 QPSK,但由于 OQPSK调制的特殊性 ,其差分编解码相应比较复杂 ,文中对DOQPSK的差分编解码和调制解调原理进行了深入的分析 ,针对传统 DOQPSK相干解调和解码方法存在的问题 ,给出一种简单高效的改进 DOQPSK解调和解码方法。该方法不仅结构简单 ,同时消除了与 DQPSK解调相比存在的 3 d B解调损失问题 ,大大提高系统的解调性能
|
| 关 键 词： | DOQPSK 差分编码 软件无线电 中频数字化 |
Design of Differentially Encoded OQPSK Modulator and Demodulator |
| |
| Authors: | Liu Shenghui Lian Quanbin Yang Jisong |
| |
| Institution: | Liu Shenghui Lian Quanbin Yang Jisong |
| |
| Abstract: | OQPSK offers a lot of improvements on QPSK in spectrum containment and modulation perfermance.But because of the speciality of the offset quadriphase modulation,the differentially detection of OQPSK(DOQPSK)is more difficult than that of QPSK.In this paper,a insight is given into the differential coding and decoding of OQPSK signal,and the mechanism of the modulation and demodulation are analysed in detail.Then based on traditional DOQPSK modem structures an advanced detection method for DOQPSK signals is developed.Compared with traditional method,the new method not only has simple structure but also overcomes a loss of 3dB in detection performance and brings great improvement to systems BER performance. |
| |
| Keywords: | DOQPSK Differential encoding Software radio Intermediate frequency digitalization |
| 本文献已被 CNKI 等数据库收录！ |
