Sensor array | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Sensor_array


00:01:31 1 Plane wave, time domain beamforming
00:05:32 2 Array design
00:07:17 3 Types of sensor arrays
00:07:27 3.1 Antenna array
00:08:55 3.2 Acoustic arrays
00:09:14 3.3 Other arrays
00:09:33 4 Delay-and-sum beamforming
00:11:27 5 Spectrum-based beamforming
00:15:09 5.1 Conventional (Bartlett) beamformer
00:16:16 5.2 MVDR (Capon) beamformer
00:17:37 5.3 MUSIC beamformer
00:20:00 5.4 SAMV beamformer
00:20:29 6 Parametric beamformers



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SUMMARY
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A sensor array is a group of sensors, usually deployed in a certain geometry pattern, used for collecting and processing electromagnetic or acoustic signals. The advantage of using a sensor array over using a single sensor lies in the fact that an array adds new dimensions to the observation, helping to estimate more parameters and improve the estimation performance.
For example an array of radio antenna elements used for beamforming can increase antenna gain in the direction of the signal while decreasing the gain in other directions, i.e., increasing signal-to-noise ratio (SNR) by amplifying the signal coherently. Another example of sensor array application is to estimate the direction of arrival of impinging electromagnetic waves. 
The related processing method is called array signal processing. 
Application examples of array signal processing include radar/sonar, wireless communications, seismology, machine condition monitoring, astronomical observations fault diagnosis, etc.
Using array signal processing, the temporal and spatial properties (or parameters) of the impinging signals interfered by noise and hidden in the data collected by the sensor array can be estimated and revealed. This is known as parameter estimation.