LI Rui, WANG Yongchao, ZHANG Jun, et al., “New Techniques for Multi-mode SatelliteNavigation Receiver,” Chinese Journal of Electronics, vol. 19, no. 2, pp. 365-368, 2010,
Citation:
LI Rui, WANG Yongchao, ZHANG Jun, et al., “New Techniques for Multi-mode SatelliteNavigation Receiver,” Chinese Journal of Electronics, vol. 19, no. 2, pp. 365-368, 2010,
LI Rui, WANG Yongchao, ZHANG Jun, et al., “New Techniques for Multi-mode SatelliteNavigation Receiver,” Chinese Journal of Electronics, vol. 19, no. 2, pp. 365-368, 2010,
Citation:
LI Rui, WANG Yongchao, ZHANG Jun, et al., “New Techniques for Multi-mode SatelliteNavigation Receiver,” Chinese Journal of Electronics, vol. 19, no. 2, pp. 365-368, 2010,
| Multi-mode satellite navigation receivers have to endure heavier computation load because of huge increment of visible satellites, in hybrid GPS, GLONASS, Galileo and Compass navigation scenario. To solve these problems, in the paper, two new technologies are presented to decrease computation load: Fast satellite selection algo- rithm (FSS) and Novel weighted least-squared positioning algorithm (NWLS). Di®erent with conventional methods, FSS is based on satellite elevation and azimuth. Firstly, all visible satellites are classi¯ed by elevation, with three sections: low, medium and high elevation. Then, parts of satellites in medium elevation section are excluded through sorting, di®erencing, and ratio of high elevation satellites and low elevation satellites. As to NWLS positioning al- gorithm, ionosphere delay and other error are analyzed separately ¯rstly; then weighted observation matrix is cre- ated according to two kinds error and satellite position. The matrix is employed in receiver position calculation. With satis¯ed positioning accuracy, FSS algorithm is able to decrease computation load by about 20»30%. In conclu- sion, FSS and NWLS algorithm are e±cient and e®ective to decrease load of receiver; they are proper to integrated satellite navigation application scenario.