Contents
What is phase tracking?
We describe here a technique called phase tracking that greatly improves the accuracy of measurements of the membrane capacitance of single cells. The phase tracking technique is a valuable tool for quantifying exocytosis and endocytosis in single cells.
What is carrier phase tracking?
Carrier phase tracking is a highly accurate means of positioning used in GNSS surveying applications. The product of the period of the carrier frequency times the speed of light gives the wavelength, which is about 1900mm for the GPS L1 carrier. At least two receivers are used to track carrier signals at the same time.
What is the difference between code phase and carrier phase GPS which one is more accurate and why is it more accurate?
That’s the problem with code-phase GPS. Survey receivers beat the system by starting with the pseudo random code and then move on to measurements based on the carrier frequency for that code. This carrier frequency is much higher so its pulses are much closer together and therefore more accurate.
What determines the sensitivity of a receiver?
The sensitivity of the receiver is dictated by its noise figure, the bandwidth of the signal, and the carrier-to-noise ratio (CNR) at which the desired signal can be decoded with acceptable error rate.
What is the precision of the carrier phase?
accurate to 1 microsecond.
How is pseudorange calculated?
The pseudoranges of each satellite are obtained by multiplying the speed of light by the time the signal has taken from the satellite to the receiver.
What is the difference between code phase and carrier phase GPS?
Carrier phase- GPS measurements based on the L1 or L2 carrier signal. Carrier- A signal that can be varied from a known reference by modulation. Code phase GPS- GPS measurements based on the pseudo random code (C/A or P) as opposed to the carrier of that code.
How do I know the sensitivity of my receiver?
To calculate receiver sensitivity, we add the overall noise figure of the receiver to the noise floor. This quantifies the noise floor at the input to the demodulator. The signal must be higher than the noise floor by the carrier to noise ratio required for a desired signal quality.