Loading patent…
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsMats H Andersson, Bo Goransson
Estimating the term…
The present invention relates to a wireless communication system (C) comprising at least one base station (1) in a communication cell (2), from which base station (1) at least two essentially uncorrelated antenna radiation lobes (7, 8, 9, 10) are formed. Each antenna radiation lobe (7, 8, 9, 10) communicates a MIMO (Multiple Input Multiple Output) communication stream. The system (C) further comprises at least one repeating transmitter/receiver (repeater) (18, 19, 20, 21), which is arranged for communicating one of the MIMO communication streams to and/or from at least one UE (user equipment) (12). The present invention also relates to a repeater that is a part of the system (C), and a method for communicating at least two MIMO communication streams to and/or from at least one UE (user equipment) (12), using at least one repeater (18, 19, 20, 21).
A wireless communication system (C) comprising at least one base station (1) in a communication cell (2), from which base station (1) at least two essentially uncorrelated antenna radiation lobes (7, 8, 9, 10) are formed, each antenna radiation lobe (7, 8, 9, 10) communicating a MIMO (Multiple Input Multiple Output) communication stream, characterized in that the system (C) further comprises at least one repeating transmitter/receiver (repeater) (18, 19, 20, 21), the at least one repeater (18, 19, 20, 21) being arranged for communicating one of the MIMO communication streams to and/or from at least one UE (user equipment) (12), the UE (12) being equipped with at least two essentially uncorrelated antenna functions.
A wireless communication system (C) according to any one of the previous claims, characterized in that each MIMO communication stream is communicated by means of a certain corresponding repeater (18, 19, 20, 21), each repeater (18, 19, 20, 21) being associated with one of the MIMO communication streams.
A wireless communication system (C) according to any one of the previous claims, characterized in that each repeater (18, 19, 20, 21) is arranged with a first repeater antenna (22), which has a first radiation lobe (23), and a second repeater antenna (24, 24′).
A wireless communication system (C) according to any one of the previous claims, characterized in that at least one repeater (18, 19, 20, 21) is arranged for creating diversity of any of the types:
A wireless communication system (C) according to any one of the previous claims, characterized in that the base station antenna radiation lobes (7, 8, 9, 10) are electrically controllable.
A wireless communication system (C) according to any one of the previous claims, characterized in that the base station (1) antennas (3, 4, 5, 6) are dual polarized, each base station antenna (3, 4, 5, 6) being arranged for communication via two essentially orthogonal polarizations.
A wireless communication system (C) according to any one of the previous claims, characterized in that lobe-forming is achieved by means of Butler matrixes (11, 34) or digital beam-forming or both.
A method for communicating at least two MIMO (Multiple Input Multiple Output) communication streams to and/or from at least one UE (user equipment) (12), comprising the step:
Dependencies are inferred from the claim text.