Forward Traffic Channel of CDMA
Forward Traffic Channel is used to Transmit Data and Signaling Information. Symbol repetition makes symbol streams at different rates adapted to those at the rate of 19.2k. The original symbol stream at the rate
Downlink Power control in LTE
The eNodeB determines the downlink transmit energy per resource element (lte epre). Downlink cell-specific reference-signal (RS) lte epre is constant across the downlink system bandwidth and constant across all subframes until different cell-specific RS power
LTE MIMO Types of Inputs and Outputs
LTE MIMO "input" and "output" are used for medium between transmitters and receivers, including both RF components - known as the "channel". Thus, the base station with two transmitters provides two inputs to the
BCH,CCCH and DCCH Channel of GSM
BCH (Broadcast Channels) BCCH(Broadcast Control Channels) Downlink Only. Broadcast information of the serving cell (System Information). Transmitted on timeslot zero of BCCH carrier. Read only by idle mobile at least once every 30 secs.
What is Polarization, Gain and Power rating in LTE Antenna
Antenna Gain Antenna gain is the ratio of the maximum radiation in a specified direction, a reference antenna in the same direction for the same power input. Usually, this increase links for isotropic antenna
OFDM implementation in Detail
A typical OFDM transmitter is shown on the following figure. To reduce the amount of RF hardware required for OFDM the modulation process is split into two parts. A first part uses the inverse
What is AMC & its Algorithm in LTE
The effective Eb/No and hence the spectral efficiency depend on BLER. However there are QoS requirements which also have to be considered. Taking both into account leads to a target BLER. AMC is in
What is Smart Antennas in LTE
What is smart antenna? Smart antennas are antenna arrays with intelligent signal processing algorithms that identify spatial signal signatures, such as the direction of arrival of the signal, and calculate the following beamforming vectors and
Definition and Effect of Reflection, Diffraction, Scattering and Multipath Propagation in RF Engineering
Reflection Diffraction and Scattering in wireless communication When any new site has been planned then it should be such a way the effect of Reflection, Diffraction, Scattering and Multipath should be Balance. Reflection in wireless
List of LTE Equipment Related Parameters
LTE parameters Equipment related parameters include the base station, antenna, and terminal. The link budget parameters vary with the base stations, antennas, and terminals of different vendors. These parameters affect the link budget result. As
Gigabit LTE
Gigabit class lte what is gigabit class lte? :- Gigabit class lte is advance version of LTE which download speed is up to 1GBps using Carrier Aggregation, 4x4 MIMO and 256-QAM techniques. Gigabit class lte
Spread Spectrum Concept
Dsss - Direct sequence spread spectrum DSSS - Direct Sequence Spread Spectrum is a spread spectrum technology in which original data is expand using PN code randomly to reduce noise and this also provide