基于精简星座鉴相的大频偏16-APSK信号载波同步

为了增大对16-APSK信号的鉴相范围，提高环路捕获带宽，提出了在环路捕获阶段使用精简星座鉴相、在捕获完成后使用混合NDA／DD鉴相的载波同步结构。这种结构在实现了环路捕获带宽增加的同时，仍然保持了混合NDA／DD法实现简单、与符号判决单元无耦合、运算速度快的优点。仿真结果验证了使用精简星座鉴相后环路捕获带宽的增加。...

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Bibliographic Details
Published in电子技术应用 Vol. 38; no. 12; pp. 87 - 89
Main Author 徐烽 邱乐德 王宇
Format Journal Article
LanguageChinese
Published 中国空间技术研究院西安分院,陕西 西安,710100%中国空间技术研究院,北京,100094 2012
Subjects
16-APSK
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精简星座
载波同步
鉴相
16-APSK
精简星座
载波同步
鉴相
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ISSN0258-7998

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Summary:为了增大对16-APSK信号的鉴相范围，提高环路捕获带宽，提出了在环路捕获阶段使用精简星座鉴相、在捕获完成后使用混合NDA／DD鉴相的载波同步结构。这种结构在实现了环路捕获带宽增加的同时，仍然保持了混合NDA／DD法实现简单、与符号判决单元无耦合、运算速度快的优点。仿真结果验证了使用精简星座鉴相后环路捕获带宽的增加。
Bibliography:16-APSK; carrier synchronization; reduced constellation; phase detection; acquisition
Xu Feng, Qiu Lede, Wang Yu （1. Xi ＇an Branch of China Academy of Space Technology, Xi ＇an 710100, China; 2. China Academy of Space Technology, Beijing 100094, China）
In order to enlarge the phase detection range and frequency offset acquisition range, a novel carrier recovery loop is proposed, which is based on the idea of combining reduced-constellation and hybrid NDA/DD phase detectors. This loop structure enlarges the acquisition range of 16-APSK carrier loop by almost three times. At the same time, the advantages of hybrid NDA/ DD method, such as simple implementation, decoupling for symbol detection unit, fast operation, etc., are still remained. Simulation results verifies the performance of the proposed structure.
11-2305/TN
ISSN:0258-7998