A new tracking loop for direct sequence spread spectrum systems on frequency-selective fading channels

1995 ◽  
Vol 43 (12) ◽  
pp. 3063-3072 ◽  
Author(s):  
Wern-Ho Sheen ◽  
G.L. Stuber
Keyword(s):  
Fading Channels ◽  
Spread Spectrum ◽  
Direct Sequence Spread Spectrum ◽  
Direct Sequence ◽  
Selective Fading ◽  
Tracking Loop ◽  
Frequency Selective Fading ◽  
Frequency Selective ◽  
Spread Spectrum Systems ◽  
Frequency Selective Fading Channels

Delay-Locked Loop for Pseudorange Measurement over Frequency-Selective Fading Channels

2013 ◽  
Vol 303-306 ◽  
pp. 2050-2053
Author(s):  
Ya Ting Wu ◽  
Yan Zan Sun ◽  
Xi Luo
Keyword(s):  
Fading Channels ◽  
Spread Spectrum ◽  
Error Characteristic ◽  
Selective Fading ◽  
Code Tracking ◽  
Frequency Selective Fading ◽  
Delay Locked Loop ◽  
Frequency Selective ◽  
Multipath Signals ◽  
Frequency Selective Fading Channels

A delay-locked loop is proposed for accurate code tracking over frequency-selective fading channels in this paper. Taking advantage of the shift-and-add property of maximum length pseudorandom spread-spectrum sequences, the differential multiplier is employed to separate each multipath component and reduce the effects of other multipath signals. The contribution of all the multipath signals is combined to enhance the error characteristic. Simulation results verify the performance improvement of the proposed loop.

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