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Title of Journal: Sci China Phys Mech Astron

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Abbravation: Science China Physics, Mechanics and Astronomy

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SP Science China Press

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DOI

10.1007/s11557-008-0571-3

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1869-1927

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TDAltBOC A new COMPASS B2 modulation

Authors: ZuPing Tang HongWei Zhou JiaoLong Wei Tao Yan YuQi Liu YiHang Ran YanLing Zhou
Publish Date: 2011/05/07
Volume: 54, Issue: 6, Pages: 1014-
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Abstract

AltBOC1510 is the baseline of COMPASS B2 signal modulation It is a BOClike signal having different PN codes in the lower and the upper main split lobes which allow one signal service per lobe The two lobes can be received and processed separately like two BPSK10 signals or coherently processed to achieve better performance Interoperability among COMPASS B2 Galileo E5 and GPS L5 is also achievable using AltBOC modulation However Galileo’s 4code AltBOC has drawbacks such as low efficiency and great receiver complexity This paper presents a new modulation type named TDAltBOC Time Division AltBOC The signal generation scheme and receiving method are presented and are compared with AltBOC in the areas of power spectrum ranging accuracy antimultipath performance antiinterference performance processing flexibility and complexity Analysis results show TDAltBOC has similar spectrum characteristics interoperability flexibility and antiinterference performance with AltBOC When the frontend bandwidth is more than 50 MHz TDAltBOC can achieve better ranging accuracy and antimultipath performance It also has such advantages as high efficiency and low receiver complexity TDAltBOC could be a good solution to COMPASS B2 navigation signal

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