MIMO-MU = Multi user It is used only in Uplink. MIMO-MU does not increase the individual user’s data rate but it does offer cell capacity gains that are similar to, or better than, those provided by MIMO-SU. The UE does not require the expense and power drain of two transmitters, yet the cell still benefits … Read more
MIMO = Multiple Input Multiple Output 2 or more transmitters and 2 or more receivers. MIMO transmits several streams whereas SIMO or MISO transmits only one stream. If there are N streams, there will be at least N antennas (here only 2). By spatially separating N streams across at least N antennas, N receiverswill be … Read more
Here i write current LTE Features and benefits of LTE in small point note which will short description of LTE technology. Current LTE version features The following are the features of LTE Technology: Spectral efficiency (5 bps/Hz DL, 2.5 bps/Hz UL), user throughput (up to 100 Mbps) in LTE, latency (10 ms UE-eNodeB), cell edge … Read more
SU-MIMO is one of the key technologies in LTE Rel 8. There are two major operations under SU-MIMO: transmit diversity and spatial multiplexing. Transmit diversity is an efficient way to improve the reliability of a system. Accordingly, it is used in LTE Rel-8 for control channel and data channel of cell edge mobile stations (called … Read more
CSI feedback allows downlink transmission to be adaptively optimized based on the instantaneous DL channel, so that closed loop beamforming and adaptive link adaptation can be enabled to optimize the system performance. The DL reference signal used for CSI measurement is different in Rel-8 and Rel-10. In Rel-8, CSI measurement is based on CRS, which … Read more
MU-MIMO is widely considered a key technology for system capacity improvement in modern wireless networks. In contrast to SU-MIMO, where the spatial multiplexing gain is confined to a single user, MU-MIMO allows multiple users to be co-scheduled on the same time-frequency resources to exploit this gain among two or more UE units. This is particularly … Read more
Operator always needs to check LTE performance before commercial launch and after commercial launch and here I write how and which KPI to check.As This is general guide so it is change for different operator but it cover all KPI. There are two types of methods for KPIs’ measurement: Field Test and Statistic Collection. Different … Read more
Here I write another two step in LTE planning and why its require to know. Starting from MIMO and Beam Forming Implementation and Understanding of Current Transmission Backhaul Network Capability of operator MIMO and Beam Forming Implementation The number of antenna deployed per cell will have an immediate impact on the coverage and capacity offered … Read more