scholarly journals An Efficient Signal Acquisition Method for GPS Software-Defined Radio Receivers

2014 ◽  
pp. 134
Author(s):  
Ta Hai Tung
Keyword(s):  
Software Defined Radio ◽  
Digital Processing ◽  
Signal Acquisition ◽  
Gps Receiver ◽  
Parallel Method ◽  
Serial Search ◽  
Radio Receivers ◽  
Computational Speed ◽  
Programmable Processors ◽  
Acquisition Method

With the development of the computationalpower of programmable processors, the Software-DefinedRadio (SDR) approach for GPS receivers has been widelyconsidered. However, in comparison with the conventionalhardware receivers, the computational speed of the SDRreceivers is still a problem needed to be improved. As afirst process of the digital processing part, and also themost resource consuming process of a GPS receiver, thesignal acquisition process is very important and neededto be improved in order to suit with the SDR approach.This paper introduces a hybrid signal acquisition methodleveraging the conventional serial search acquisition (typical in hardware receivers), and the FFT-based parallelsearch (typical in SDR receivers) in order to significantlyimprove the acquisition sensitivity, meanwhile keep thecomputational complexity still comparable with that of theFFT-based parallel method.

scholarly journals Experiences with the GPS in Unstabilized CubeSat

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Pavel Kovar
Keyword(s):  
Experimental Data ◽  
Signal Acquisition ◽  
Gps Receiver ◽  
Small Satellite ◽  
Power Budget ◽  
Successful Operation ◽  
Polar Orbit ◽  
Position Information ◽  
Space Experiments ◽  
Satellite Rotation

The paper summarizes the experiences with the operation of the piNAV GPS receiver in a 1U unstabilized CubeSat operated on LEO orbit. piNAV L1 is a GPS receiver developed by an author for small satellite missions. The receiver is equipped with the 15 GPS L1 C/A channels and acquisition accelerator that shortens the cold start of the receiver on LEO to 65 s. The typical power consumption is 120 mW. Lucky-7 is a private 1U technological CubeSat with power budget 1 W that operates on the quasisynchronous polar orbit at altitude 520 km. One of its scientific missions is to test the operation of GPS. The space experiments proved the successful operation of the GPS receiver. The position information was available for approximately 80% of the time, where the position outage was caused by a satellite rotation and relatively long navigation signal reacquisition. The experimental data proved that the position availability can be improved by a higher-performance signal acquisition engine.

scholarly journals Weak GPS signal acquisition method based on DBZP

2018 ◽  
Vol 29 (2) ◽  
pp. 236-243 ◽  
Author(s):  
Jianing WANG ◽  
◽  
Baowang LIAN ◽  
Zhe XUE ◽  
Keyword(s):  
Signal Acquisition ◽  
Gps Signal Acquisition ◽  
Acquisition Method

scholarly journals Low-noise correlation measurements based on software-defined-radio receivers and cooled microwave amplifiers

2016 ◽  
Vol 87 (11) ◽  
pp. 114706 ◽  
Author(s):  
Teemu Nieminen ◽  
Pasi Lähteenmäki ◽  
Zhenbing Tan ◽  
Daniel Cox ◽  
Pertti J. Hakonen
Keyword(s):  
Software Defined Radio ◽  
Low Noise ◽  
Noise Correlation ◽  
Radio Receivers ◽  
Microwave Amplifiers
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