Abstract
Legacy receiver is susceptible to the interference of high dynamic pseudolite signals. The high energy pulses always saturate the widely used 1-bit ADC in the legacy receiver so that useful signals are buried in the noise. Multi-bits ADC indeed improve the quantization resolution, where the useful signals can be distinguished from the pulses. However, the saturation is inevitable in some extreme cases; pulse blanking is required to suppress the pulsing interference. In this paper, an optimized receiver front-end consists of multi-bits ADC and pulse blanker is proposed. An optimal set of parameter settings is determined by evaluating the SNR loss, in which the optimal blanker configuration has been analyzed with respect to ADC quantization levels. Simulation results show that the optimized front-end is able to reduce the SNR loss in the saturation case by 1.3 dB, leading to a 40 % maximum duty cycle tolerance.
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Acknowledgment
This work was financially supported by the National Natural Science Foundation of China (61074169), the National High Technology Research and Development Program of China (2013AA122403), and the Self-determined and Innovative Research Funds of WUT (2013-YB-018).
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Wu, D., Ji, J., Li, J., Zhao, D., Chen, W. (2015). Optimization of BeiDou Receiver Front-End for High Dynamic Pseudolite Signals. In: Gong, M., Linqiang, P., Tao, S., Tang, K., Zhang, X. (eds) Bio-Inspired Computing -- Theories and Applications. BIC-TA 2015. Communications in Computer and Information Science, vol 562. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49014-3_44
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DOI: https://doi.org/10.1007/978-3-662-49014-3_44
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