MIMO wireless communication system

Details MIMO wireless communication system MIMO wireless communication system

2005-03-22

2005-03-22

Wimer, Michael C. (Department: 2828)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C342S361000, C343S797000, C455S562100

Reexamination Certificate

active

06870515

ABSTRACT:
Previous MIMO systems have used spatially diverse antenna elements in order not to reduce the number of orthogonal channels that can be realized. The present invention recognizes that this leads to large antenna sizes, as compared to multiple beam antenna systems which use closely spaced antenna elements. In order to provide a compact antenna unit, while still allowing a MIMO system to be exploited, the present invention recognizes that polarization diversity only can be used in a MIMO system without the need for spatially diverse antenna elements. Closely spaced antenna elements are used and this enables a compact MIMO antenna unit to be provided. In addition, such MIMO systems with polarization diversity but no spatial diversity can advantageously be used in line of sight situations and also combined with multi-beam antenna systems to further increase capacity.

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TSGR1#16(00)1219 Practical aspects of multiple antenna architectures for HSDPA. Lucent Technologies. Pusan, South Korea, Oct. 10-13, 2000. 2 pages.

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