Advanced Antenna Systems The WiMAX standard provides extensive support for implementing advanced multiantenna solutions to improve system performance. Significant gains in overall system capacity and spectral efficiency can be achieved
Google Going to Set Up its Own Mobile Network
Google is reported to have held preliminary discussions that could lead to it setting up its own wireless network in the USA, according to a report in the Wall Street Journal.
Uplink data transmission in LTE
The mapping of transport channels and UL control information (UCI) to physical channels is a task of the physical layer (PHY). Furthermore reference signals are provided by the physical layer
How Modulation-QPSK in CDMA ?
In an actual application, the system implements the modulation in this way: as shown above, I and Q channel sequences in the figure represent two channels of cyclic PN
Microsoft Surface RT More Profitable Than IPad, Teardown Analysis Reveals
The Surface RT model with the minimum 32 gigabytes of NAND flash memory and an optional black Touch Cover carries a bill of materials (BOM) of $271.00, according to a
How Frame Structure in Wimax ?
The physical frame includes the downlink sub-frame, uplink sub-frame, TTG, and RTG. The physical frame length and the respective duration of downlink sub-frame and uplink sub-frame are broadcast by the
Which Types of Antennas Used in WIMAX ?
WiMAX antennas, just like the antennas for car radio, cell phone, FM radio, or TV, are designed to optimize performance for a given application. The figure above illustrates the three
OFDM Receiver and How it work for LTE?
The receiver is like in any other radio system the more complicated part. In radio systems and of course also OFDM there are two special points a receiver has to
What is SC-FDMA and how it works in LTE?
One of the major drawbacks of an OFDMA system is, that the transformation of a complex symbol mapped sequence (e.g. BPSK, QPSK, etc.) onto a small set of subcarriers produces
Radio Protocol Architecture in LTE
The EUTRAN radio protocol model specifies the protocols terminated between UE and eNB. The protocol stack follows the standard guidelines for radio protocol architectures (ITU-R M1035) and is thus quite
Different Tasks and States of RRC Protocol in LTE-EUTRAN
The RRC protocol for EUTRAN is responsible for the basic configuration of the radio protocol stack. But one should note, that some radio management functions (scheduling, physical resource assignment for
How to Layer 2 Functions and Data Flow in LTE
For layer 2 let us first take a look into the uplink. Data transmission is handled through the protocol stack according to the following flow: 1. Data is generated by