摘要: |
针对幅相联合键控(16-APSK)信号,基于V&V算法提出了一种用于反馈环路的非数据辅
助的(Non DataAided, NDA)鉴相算法。该算法首先对信号进行星座分割,然后对各子星座
上的点分别应用V&V算法,不同子星座鉴相的权重可通过参数设置方便地进行控制。同时,
还提出了一种变体算法,针对每个子星座,将V&V算法对信号幅度的非线性运算直接替换为
一个固定的幅度,使得对各子星座鉴相权重的控制更加简单,也更便于工程实现。经仿真验
证,通过恰当控制算法参数,可以起到降低鉴相模糊度的作用,有利于简化16-APSK信号鉴
相的解模糊处理。 |
关键词: 16-APSK 鉴相 反馈环路 非数据辅助 星座分割 |
DOI: |
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基金项目: |
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Novel non-data-aided phase detector algorithms for 16-APSK signals |
XU Feng,QIU Le-de,WANG Yu |
() |
Abstract: |
For 16-APSK (Amplitude and Phase Shift Keying) signals,a NonDataAided(NDA)
phase detector algorithm based on V&V algorithm is proposed. The APSK
constellation is partitioned, and V&V algorithm is applied for each subconstel
lation. By parameter setting, detector weight of each subconstellation can be c
onveniently controlled. A variant of this algorithm is also given, in which the n
onlinear operation in each subconstellation detector is substituted by a pre
designated constant value. This variant algorithm provides easier weight control,
and is more convenient for engineering implementation. Simulation results prove
that, with proper parameter control, the proposed algorithms can reduce phase am
biguity of 16-APSK phase detection to 4 fold, thus simplifying the phase ambigui
ty resolution process. |
Key words: 16-APSK phase detector feedback loop non data aided constellation partition |