自适应非相干矢量跟踪环路设计

Aiming at the problem that the correlation results are influenced by navigation message data transition, a kind of self-adaptive non-coherent vector tracking loop is proposed. By applying non-coherent frequency/code discriminator in traditional vector tracking loop, the accumulation results of coherent correlators will not be affected by the data transition. The sensitivity and dynamic performance of non-coherent vector tracking loop is analyzed and simulated. The optimized selection scheme for the loop's integration time within specific dynamic range is provided, which realizes the self-adaptive adjustment within the integration time of 1ms to 10ms and non-coherent times of 1 to 10. The experiment results show that the proposed non-coherent strategy increases the sensitivity by 6 dB, improving the tracking loop's performance.