An Improved Adaptive Tracking Algorithm based on Iteration and Discriminator Optimization for Burst DSSS Signals
-
Yong Xiao
,
Guangxia Li
Abstract
To enhance the pseudo-range measurement performance based on code synchronization of burst Direct Sequence Spread Spectrum (DSSS) signals, a new adaptive tracking algorithm based on iteration is proposed. After a forward tracking based on initial values provided by acquisition or coarse tracking, a backward estimation is adopted to get more precise initial values. Based on these precise initial values, forward tracking is carried out again. By performing forward tracking and backward estimation iteratively, a more and more precise tracking result can be achieved. At the beginning of each tracking, code discriminator optimization is carried out considering the precise of initial carrier and code phase. For the convenience of optimization, a performance evaluation algorithm of dot-product power code discriminator for band limited signal is proposed. Compared with several existing tracking algorithms which exploit received signal only once, simulation results show the superiority of our proposed iterative tracking algorithm, under data-aided and non-data-aided conditions respectively.
©[2013] by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Masthead
- Broadband Circularly Polarized Microstrip Antenna Using L-Shaped Probe and H-shaped Aperture-Coupling
- Broadband Circularly Polarized Cavity Backed Slot Antenna Array with Broadband Sequential Rotation Feed
- A Generalized Circuit Model for High Directivity Coupler Using Mu-Negative Transmission Lines
- A 0.6-V 5.2 GHz Folded Cascode LNA with Transformer-feedback Technique for Ultra Low Power Applications
- Improved Thermal Stability of RF Power BJT with Ballast Circuits
- Adaptive Power Allocation for Effective Capacity of TAS-MRC Systems
- Outage Probability of Interference-limited Switch and Stay Diversity System over Gamma Shadowed Nakagami-m Fading Channels
- Average Fade Duration of Dual Selection Diversity over Correlated Unbalanced Nakagami-m Fading Channels in the Presence of Cochannel Interference
- Performance Analysis of Cooperative ARQ Scheme with Co-channel Interference
- An Improved Adaptive Tracking Algorithm based on Iteration and Discriminator Optimization for Burst DSSS Signals
