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I. INTRODUCTION MIMO technology is becoming mature, and incorporated into emerging wireless broadband standards like LTE [1]. For example, the LTE standard allows for up to 8 antenna ports at the base station. Basically, the more antennas the transmitter/receiver is equipped with, and the more degrees of freedom that the propagation channel can provide, the(More)
MIMO technology is a way of using multiple antennas to simultaneously transmit multiple streams of data in wireless communication systems. MIMO in cellular systems brings improvements on four fronts: • improved data rate, because the more antennas, the more independent data streams can be sent out; • improved reliability, because the more antennas the more(More)
—Massive multiple-input multiple-output (MIMO) is one of the main candidates to be included in the fifth generation (5G) cellular systems. For further system development it is desirable to have real-time testbeds showing possibilities and limitations of the technology. In this paper we describe the Lund University Massive MIMO testbed – LuMaMi. It is a(More)
Very-large multiple-input multiple-output (MIMO), also called massive MIMO, is a new technique that potentially can offer large network capacities in multiuser scenarios, where the base stations are equipped with a large number of antennas simultaneously serving multiple single-antenna users on the same frequency. We investigate channel behavior for a(More)