Separation distance reduction in MIMO systems using end-fire antenna arraysThi-Qar University Journal for Engineering Sciences (2011)
AbstractThe main problem in Multiple Input-Multiple Output (MIMO) systems is the separation distance between antennas which must be greater than or equal to half wavelength. Satisfying this separation is difficult or impossible especially at mobile communication, therefore this paper study the capability to reduce these separation distance by using End-Fire antenna arrays. Each antenna at the transmitter and receiver side is replaced by a set of antennas work as an array with a radiation pattern directed toward the axes of the arrays. The separation between elements in these arrays is fixed at quarter wavelength in order to have one main beam which is useful condition to reduce the mutual correlation between arrays. The results show that the performance of the planar MIMO (MIMO with End-Fires) is better than that of linear MIMO at the small values of the separation distance for different types of MIMO systems. The performance of the planar and linear MIMO system approximately the same at the large values of separation distance (near half wavelength), and in some region of signal to noise ratio the performance of planar system is the worst. The performance of the planar system improves as the number of elements in End-Fire arrays increases till certain number of elements, and then the performance will be constant. Furthermore, decreasing the number of elements in arrays will make the performance worst.
- Multiple antenna systems,
- planar MIMO,
- Channel capacity
Citation InformationAmean S. Al_Safi. "Separation distance reduction in MIMO systems using end-fire antenna arrays" Thi-Qar University Journal for Engineering Sciences (2011)
Available at: http://works.bepress.com/amean_al_safi/4/