In order to evaluate the impact of Low Earth Orbit(LEO)navigation augmentation signal on the receiving of BeiDou navigation satellite system(BDS)signal,and to guide the receiver design,the quantization effect and carrier-to-noise ratio loss model of BDS signal affected by LEO augmentation is derived on the basis of probability and statistics theory,and Monte Carlo simulation is utilized to present the relationship of the BDS signal carrier-to-noise loss,the front-end gain and the LEO power enhancement at 1～6 bit quantization bit-width.The theoretical and simulation results agree well.According to the experimental results,the optimal front-end gain is independent of the LEO power enhancement,while the minimum carrier-to-noise loss will be more and more larger with the increase of LEO signal power,and the quantization loss is noticeable at 1～2 bit quantization bit-width,while the characteristics of BDS signal carrier-to-noise ratio loss at 3 bit and above are basically the same.
关键词
低轨增强/北斗/概率统计理论/量化效应/载噪比损耗模型/蒙特卡罗仿真
Key words
LEO navigation augmentation/BDS/probability and statistics theory/quantization effect/carrier-to-noise ratio loss model/Monte Carlo simulation
维普
万方数据