Time delay estimation between two complex signals(IQ)

1. How do you find the time delay between two signals?
2. How do you find time delay using cross correlation?
3. What is IQ in DSP?
4. What is delay time estimation?

How do you find the time delay between two signals?

τdelay=argmax ((f∗g)(t)), this will estimate the time offset where the signals are best aligned.

How do you find time delay using cross correlation?

For delay analysis, correlation in the time domain is widely used. The correlation function plots the similarity between two signals for all possible lags τ. The peak of the correlation function occurs at the lag with the best similarity between the two signals, i.e. the estimated delay.

What is IQ in DSP?

What does IQ stand for? The I stands for “in phase” and the Q stands for quadrature. By convention, the I signal is a cosine wave and the Q signal is a sine wave. Another way to say that is that the I and Q signals are 90 degrees out of phase.

What is delay time estimation?

Time delay estimation (TDE) is the problem of estimating the time delay between two received signals which have originated from same transmitter. ¹. This estimation problem is of fundamental importance in radar signal processing for detecting the presence of targets and identifying radar transmitters.