Radar MIMO Virtual Antenna Array Formation

1. What is array antenna in radar?
2. Is array gain used in massive MIMO?
3. How does MIMO radar work?
4. How is antenna gain array calculated?

What is array antenna in radar?

An Antenna array is a radiating system comprising radiators and elements. Each of this radiator has its own induction field. The elements are placed so closely that each one lies in the neighbouring one's induction field. Therefore, the radiation pattern produced by them, would be the vector sum of the individual ones.

Is array gain used in massive MIMO?

Massive MIMO is an important building block of future wireless systems, as, depending on the scenario, a larger number of base station antennas is believed to increase the achievable transmit and receive array gain, i.e., it allows for a larger SNR at the same transmit power, a lower bit error ratio by exploiting ...

How does MIMO radar work?

In a traditional phased array system, additional antennas and related hardware are needed to improve spatial resolution. MIMO radar systems transmit mutually orthogonal signals from multiple transmit antennas, and these waveforms can be extracted from each of the receive antennas by a set of matched filters.

How is antenna gain array calculated?

Gtot=12π∫2π0|1+ejkdcosθ|2dθ=2(1+J0(2dk)), where J0 is the Bessel function of the first kind. Passive antenna arrays should yield Gtot≤1 , where equality holds for purely lossless systems. However, the expected result is not obtained; for example, using a quarter wavelength antenna separation, the result is Gtot=1.47 .