The uncertainty of pseudo-code phase and carrier frequency shift are extremely important for GPS signal acquisition in the weak signal environment.
伪码相位及载波频偏不确定度是制约微弱信号环境下信号捕获性能的重要因素。
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Using pseudo random code to modulate the signal's phase equals to frequency up-conversion of the pseudo random code by the carrier frequency.
信号采用伪随机编码进行相位调制，相当于是用载频对伪随机码进行上变频。
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