Which of the following technique is used in adaptive antenna system?
An Adaptive Antenna System (AAS) can focus its transmit energy to the direction of a receiver. While receiving, it can focus to the direction of the transmitting device. The technique used in AAS is known as beamforming or beamsteering or beamshaping.
What are the types of smart antennas?
There are basically two types of smart antennas: Switched beam systems and adaptive array systems. The switched beam system comprises only basic switching between separate directional antennas or predefined beams of an array while enabling high directivity and gain [2].
What is adaptive array antenna?
Smart antennas (also known as adaptive array antennas, digital antenna arrays, multiple antennas and, recently, MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signatures such as the direction of arrival (DOA) of the signal, and use them to calculate beamforming vectors …
How is MIMO different from smart antenna?
MIMO makes antennas work smarter by enabling them to combine data streams arriving from different paths and at different times to effectively increase receiver signal-capturing power. Smart antennas use spatial diversity technology, which puts surplus antennas to good use.
What are adaptive arrays?
Adaptive arrays are a radical departure from conventional thinking in antenna design, offering substantial improvements in performance over fixed pattern antennas in environments that include severe interference and jamming.
Why smart antenna is used?
The main benefit of smart antenna systems is its ability to simultaneously increase the useful receiving signal and lower the interference level, increasing the signal-to-interference ratio (SIR) in more densely populated areas.
What is the difference between antenna and smart antenna?
In truth, antennas are not smart—antenna systems are smart. Generally co- located with a base station, a smart antenna system combines an antenna array with a digital signal-processing capability to transmit and receive in an adaptive, spatially sensitive manner.
How are smart antennas different from traditional antennas?
Smart Antennas, also known as multiple antennas, adaptive array antennas, and so on is used to increase the efficiency in digital wireless communication systems. It works by taking the advantage of the diversity effect at the transceiver of the wireless system that is the source and the destination.
Is MIMO smart antenna technology?
Smart antenna techniques, such as multiple-input multiple-output (MIMO) systems, can extend the capabilities of 3G and 4G systems to provide customers with increased data throughput for mobile high-speed data applications.
Which of the following is the drawback of smart antenna?
1. Which of the following is the drawback of smart antenna? Explanation: Design of trans-receiver is a complex when compared to the traditional base station trans-receivers because separate trans-receiver chains are needed for each array elements.
Why smart antenna is important?
Smart antennas provide many benefits. The main benefit of smart antenna systems is its ability to simultaneously increase the useful receiving signal and lower the interference level, increasing the signal-to-interference ratio (SIR) in more densely populated areas.
What is smart antenna?
Definition. A smart antenna system combines multiple antenna elements with a signal- processing capability to optimize its radiation and/or reception pattern automatically in response to the signal environment.