16*16 MIMO Testbed for MU-MIMO Downlink Transmission

MIMO Testbed for MU-MIMO Downlink Transmission

Multi-user multiple input multiple output (MU-MIMO) systems have attracted much attention as a technology that enhances the total system capacity by generating a virtual MIMO channel between a base station and multiple terminal stations. Extensive evaluations are still needed because there are many more system parameters inMU-MIMO than in single user (SU)-MIMO and the MU-MIMO performance in act...

Adaptive Opportunistic Transmission in MU-MIMO Downlink with Reduced Feedback

In this paper we proposed two threshold-aided adaptive opportunistic transmission strategies in multiuser multiple-input multiple-output (MU-MIMO) downlink with limited feedback. Threshold scheme in company with transmission mode adaptation are employed to handle feedback cost and improve system performance. In one time slot, each mobile station (MS) carries out channel estimation, selects appr...

Network MIMO Downlink Transmission

The effects of cooperating base stations in the downlink of an OFDM-based cellular network with frequency reuse factor one are studied. In this so-called network MIMO scenario the signals of several users are jointly processed before transmission in order to handle the unavoidable multi-user interference. We apply and study pre-processing techniques well-known from conventional MIMO scenarios i...

Precoding Schemes for MIMO Downlink Transmission

Linear Precoding Performance of Massive MU - MIMO Downlink System

Nowadays, multiuser Multiple-In Multiple-Out systems (MU-MIMO) are used in a new generation wireless technologies. Due to that wireless technology improvement is ongoing, the numbers of users and applications increase rapidly. Then, wireless communications need the high data rate and link reliability at the same time. Therefore, MU-MIMO improvements have to consider 1) providing the high data r...