食品与发酵科技--杂志社 关键词： 紫甘薯色素；紫外可见分光光度计；查耳酮；假碱 [gap=859]words: purple sweet potato anthocyanins; Uv-visible spectrophotometry; chalcone; pseudo-base
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When processing digital base-band, the signal of pilot-frequency was taken out from normal carrier channel and it would be used for transmitting pseudo pilot-frequency.
在数字基带处理时，从正常载频信道中提取出导频信号，用于伪导频的发射。
The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and in the case of low satellite elevation.
仿真结果表明用户和基准台之间距离增大和低卫星仰角都将使伪距残差增大，气象因素和高程对伪距残差也有影响。
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