Smart Antenna and Multirate Digital Signal Processing: A Review
Nipun Kumar Mishra, Anil Kumar, Dinesh Kumar Vishwakarma, Soma Das · SSRN Electronic Journal · 2014
A communication system has to operate only on the assigned band to avoid interference with another system. To provide services to the new added users on the given limited spectrum requires a more efficient use of the radio spectrum. Spatial signal processing can efficiently make use of the radio spectrum and can provide solutions to fading and multipath propagation which normally occur in wireless communications. Wider coverage and higher transmission rate can also be achieved with spatial signal processing. Spatial signal processing and diversity reception can be achieved with an efficient design of the smart antenna. Due to advancement in low-cost digital signal processors and innovative software-based signal processing techniques, the smart antenna systems have received enormous interest worldwide during the past decade. They have been extensively employed in several applications such as mobile communication, mobile wireless ad-hoc network, cognitive radio and mobile satellite. All applications are based on the efficient design of smart antenna systems. The multirate digital signal processing offers a reduced computation complexity for the given task and reduced transmission rate. This paper investigates the work done on smart antenna during the last decade and discusses the application of multirate signal processing in smart antenna.