scholarly journals An Adaptive Algorithm for Weak Signal Acquisition under Near-far Effect

2016 ◽  
Keyword(s):  
Adaptive Algorithm ◽  
Signal Acquisition ◽  
Weak Signal

scholarly journals Efficient BeiDou DBZP‐based weak signal acquisition scheme for software‐defined receiver

2018 ◽  
Vol 12 (6) ◽  
pp. 654-662 ◽  
Author(s):  
Qian Meng ◽  
Jian‐Ye Liu ◽  
Qing‐Hua Zeng ◽  
Shao‐Jun Feng ◽  
Rui Xu
Keyword(s):  
Signal Acquisition ◽  
Weak Signal ◽  
Acquisition Scheme

scholarly journals GPS Civil Signal Self-Interference Mitigation During Weak Signal Acquisition

2007 ◽  
Vol 55 (12) ◽  
pp. 5859-5863 ◽  
Author(s):  
Yu T. Morton ◽  
Mikel Miller ◽  
James Tsui ◽  
David Lin ◽  
Qihou Zhou
Keyword(s):  
Interference Mitigation ◽  
Signal Acquisition ◽  
Weak Signal

Through-Casing Resistivity Logging Signal Acquisition and Processing Techniques

2011 ◽  
Vol 403-408 ◽  
pp. 2659-2662
Author(s):  
Zheng Guo Yan ◽  
Juan Su
Keyword(s):  
Signal Detection ◽  
Measurement Range ◽  
Low Noise ◽  
Signal Acquisition ◽  
Weak Signal ◽  
Weak Signal Detection ◽  
Detection Techniques ◽  
Resistivity Logging ◽  
Processing Techniques ◽  
Signal Acquisition And Processing

Weak signal detection is the key technique in developing through-casing resistivity logging tool. In this paper, ultra-low-noise preamplifier, oversampling method, sampling integration and sampling average method, digital phase-sensitive detection technique are applied in detecting logging signals and 30nV is achieved. The indoor calibration test and field experiment of through-casing resistivity logging model machine with those weak signal detection techniques were carried out. The result showed that the measurement range of formation resistivity is 0~200 Ω.m.

An Enhanced Weak Signal Acquisition Algorithm for Indoor Positioning Receiver

2013 ◽  
Vol 411-414 ◽  
pp. 1510-1516
Author(s):  
Zhong Liang Deng ◽  
Yu Zhang ◽  
Xie Yuan
Keyword(s):  
White Noise ◽  
High Power ◽  
Signal Interference ◽  
Signal Acquisition ◽  
Weak Signal ◽  
Ofdm System ◽  
Pn Sequence ◽  
Strong Signal ◽  
Power Simulation ◽  
Time Division

This paper focuses on the research of weak signal acquisition based on time-division CDMA-OFDM (TC-OFDM) system by using long PN sequence with low power. An enhanced weak signal acquisition algorithm is proposed to improve the ability of weak signal acquisition compared with regular algorithm which uses short PN sequence with high power. Simulation shows that the ability of resistance to white noise in weak signal acquisition is enhanced by 12dB. Further, because of the good correlation of long PN sequence, the performance of resistance to strong signal interference has also improved 6dB.

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