Introducing SMART Antennas to Improve Throughput

Many algorithms are being developed. Arrival direction algorithm: MUSIC - Multi-signal classification This is a subspace-based DoA algorithm. The subspace algorithm provides higher resolution and is more accurate. The physical size of the array opening is not a problem. The MUSIC algorithm is widely favored. It involves extensive searches for all possible steering vectors. [1] [2] ESPRIT - Estimation of signal parameters by rotation invariant method This algorithm is more robust than the MUSIC algorithm.

Smart antenna technology can overcome some of the shortcomings of today's wireless products. The smart antenna intelligently combines the signals received at each antenna element and adjusts the antenna characteristics so as to optimize the performance when the transmitter or the receiver moves and the environment changes, thereby greatly increasing the reception It is a multielement antenna to improve. For example, the method of separating signals from multiple tires is to use a smart antenna as manufactured by Motia. This special Motia device is designed to operate at 433 MHz and can mitigate multipath signals at this frequency. For example, the signal from the tire coming back from the antenna contains a multipath effect. Especially if the antenna is slightly off the center of the vehicle, each wheel will be different.

Smart antennas can be called new technologies for use in mobile communications, but in fact the first smart antenna was used by the government to introduce military applications in the 1960s. Signal transmission uses directional beams to avoid environmental interference such as noise while hiding transmission data from enemies. At that time, the antenna structure was very large, it took time to calculate accurate transmission speed and signal accuracy.

A smart antenna can be seen as a combination of antennas, and the transmitted and received signals are processed using intelligent algorithms. These intelligent algorithms make the antenna work efficiently and communication is reliable. The main purpose of a smart antenna is to change its direction based on the target movement and the main lobe of the antenna if the target is moving the antenna and the signal comes from the target source. It is necessary for the maximum intensity of the signal to be directed to the target so as to hit the target. Most smart antennas are used in wireless communication systems to reduce interference and improve user capacity and data rate.