Supports 1.4MHz, 3.0MHz, 5MHz, 10MHz, 15MHz, 20MHzģ00 Mbps Downlink(DL) 4x4MIMO and 20MHz, 75 Mbps Uplink(UL)Ībout 100Mbps for single chain(20MHz,100RB,64QAM), 400Mbps for 4×4 MIMO. to focus on the - generally impressive - downlink speeds offered over mobile broadband, rather than the uplink. In order to increase the data rates LTE-Advanced utilizes higher number of antennas and added carrier aggregation feature. LTE-Advanced is the upgraded version of LTE technology to increase the peak data rates to about 1GBPS in the downlink and 500MBPS in the uplink. It supports peak data rate of 300MBPS in the downlink and 75MBPS in the uplink(theoretically). Various physical channels and logical channels are designed to take care of data as well as control informations. The LTE uses OFDMA modulation in the downlink(from eNodeB to UEs) and SC-FDMA modulation in the uplink(from UEs to eNodeB). Based on the bandwidth different physical layer configurations are used for the system elements(UEs and eNodeBs) to communicate efficiently. On the other hand, in the case of time division duplex (TDD) version of LTE, the same frequency range is used and an uplink-downlink configuration defines how the time slots are allocated for. Uplink physical channels and uplink physical signals are as follows. For more information, please refer to LTE UL Src (Uplink Baseband Signal Source) and LTE DL Src (Downlink Baseband Signal Source). Figure 1 : Downlink Physical Channel Structure. For more information on the calculation of number of channel bits and transport block size, please refer to LTEULChannelCoder and LTEDLChannelCoder. There are various bandwidths supported in LTE. The figure below shows the structure of the downlink physical channel and downlink physical signals. It uses FDD and TDD duplex modes for the UEs to communicate with the eNodeB. The highest theoretical peak data rate on the transport channel is 75 Mbpsin the uplink, and in the downlink, using spatial multiplexing, the rate can be as.
LTE is the short form of Long Term Evolution. LTE is specified in 3GPP release 8 and LTE Advanced is specified in 3GPP release 10. The specifications are published by 3rd Generation Partnership Project(3GPP). LTE vs LTE Advanced covers difference between LTE and LTE Advanced 3GPP wireless technologies.īoth the LTE and LTE-Advanced are fourth generation wireless technologies designed to use for high speed broadband internet access. LTE vs LTE Advanced CableFree 4G TDD-LTE Technology
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