Volume 33 Issue 1
Jan.  2013
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Lv Zhicheng, Nie Junwei, Liu Zengjun, Wang Feixue. Effects of enhancing power on received signal quality in satellite navigation system[J]. Journal of Space Science, 2013, 33(1): 101-107. doi: 10.11728/cjss2013.01.101
Citation: Lv Zhicheng, Nie Junwei, Liu Zengjun, Wang Feixue. Effects of enhancing power on received signal quality in satellite navigation system[J]. Journal of Space Science, 2013, 33(1): 101-107. doi: 10.11728/cjss2013.01.101

Effects of enhancing power on received signal quality in satellite navigation system

doi: 10.11728/cjss2013.01.101
  • Received Date: 2011-09-15
  • Rev Recd Date: 2011-12-23
  • Publish Date: 2013-01-15
  • The GPS modernization program plans to add M-code navigation signals which have the feature of beam power enhancement in the frequencies of L1 and L2. Taking GPS L1 M-code signal as example, the received signal quality, affected by power-enhanced signal from the aspects of spectral overlap as well as equivalent carrier-to-noise ratio of the received signals, is analyzed. Simulation results show that when GPS L1 M-code signal enhancement is within the range of 20dB, the anti-jamming performance of power-enhanced signal will be improved significantly and the equivalent carrier-to-noise ratio of non-power-enhanced signal drops less than 2dB. When the signal enhancement range surpasses 20dB, the quality of non-power-enhanced signal will drop rapidly attributing to the interference from power-enhanced signal. While, when keep on increasing the signal power, the value of equivalent carrier-to-noise ratio of power-enhanced signal will no longer increase after having reached certain extreme value.

     

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