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
Tag Archives: traffic
What is EPS Bearer in LTE?
Eps bearer LTE EPS is a connection-oriented transmission network and, as such, it requires the establishment of a “virtual” connection between two endpoints (e.g. a UE and a PDN-GW) This
Resource Block & Physical Resource Block in LTE
What is Resource block in lte? :- A resource block is the smallest unit of resources which allocated to a user. The resource block is 1 slot long in time
Radio Bearer in LTE
There are 2 types of Radio Bearers (RB) in LTE: To carry signaling. There are called the SRB (Signaling Radio Bearer) To carry user data. There are associated with an
CDMA Channel Frequencies & Calculation
The 850MHz CDMA band is most popularly used all over the world.This band as mentioned in the previous slide works between 824-849MHz Used for the Reverse link communication
Implementation Margin in LTE
Implementation margin is used to include non-ideal receiver effects such as channel estimation errors, tracking errors, quantization errors, and phase noise. This implementation margin or sensitivity degradation can be used
Traffic Operation Overview in LTE
DL Data Transmission in LTE UL Data Transmission in LTE DL and UL schedulers are running in the eNodeB. From the following inputs, the eNodeB schedules the data on the
QoS Parameters of LTE
The QoS Class Identifier (QCI) is a scalar that is used as a reference to access node-specific parameters that control bearer level packet forwarding treatment (e.g. scheduling weights, admission thresholds,
PN Code Generation & Masking
PN Code Generation PN Code Generation PN codes are generated from prime polynomials using modulo 2 arithmetic. The state machines generating these codes are very simple and consist of
How Walsh Code Generate in CDMA
• Definition: Orthogonal functions have zero correlation. Two binary sequences are orthogonal if the process of “XORing” them results in an equal number of 1’s and 0’s. Example: 0000
Conventional Blocking Analysis for CDMA
Conventional Blocking formula and its Analysis for cdma. In AMPS and TDMA systems, voice/traffic channels are assigned to users as long as they are available. Given the required offered traffic,