Open AccessNon‐data‐aided timing recovery algorithm for MIL‐STD SOQPSK
Author(s) -
Wang Qifeng,
Huang Benxiong,
Xu Zhengguang
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.4016
Subject(s) - algorithm , offset (computer science) , phase shift keying , phase noise , frequency offset , symbol (formal) , nonlinear system , computer science , electronic engineering , mathematics , telecommunications , engineering , bit error rate , orthogonal frequency division multiplexing , physics , decoding methods , channel (broadcasting) , quantum mechanics , programming language
The phase trajectory of military standard (MIL‐STD) shaped‐offset quadrature phase shift keying (SOQPSK) is analysed and the fourth‐power nonlinearity and phase accumulation technology is used to eliminate the self‐noise caused by symbol information. After the operation, the MIL‐STD SOQPSK signal is converted into a pure tone during a symbol period and the timing offset is estimated from the initial phase of the tone. Computer simulation shows that its estimation performance is remarkably close to the modified Cramer‐Rao bound and better than that of the existing non‐data‐aided method in terms of estimation accuracy.