Table of Contents
What power control mechanism is used in WCDMA?
II. Power control in WCDMA is a closed-loop PC which is a combination of outer and inner closed loop control (see Figure 1). The inner (also called fast) closed loop PC adjusts the transmitted power in order to keep the received Signal-to-Interference Ratio (SIR) equal to a given target.
Why is power control used in cdma2000 and WCDMA?
The power control in cdma 2000 and WCDMA is to minimize interference due to presence of other mobile users, fading, log normal shadowing as well as from fast Rayleigh fading.
How is power control done in CDMA?
In CDMA, each user’s transmission power is allocated by the control power to achieve the same power (Pr) which is received by the base station/BTS with access probe with low power. The mobile sends its first access probe, then waits for a response from the base station.
What is Cpich power in 3g?
CPICH stands for Common Pilot Channel in UMTS and some other CDMA communications systems. In WCDMA FDD cellular systems, CPICH is a downlink channel broadcast by Node Bs with constant power and of a known bit sequence. Its power is usually between 5% and 15% of the total Node B transmit power.
What is a pilot channel?
A pilot channel cuts a rectangular notch into the bottom of the cross section. Generally this notch is not very wide (often 1 ft is used), but it provides depth to the cross section at low flows (typically make it 5 to 10 feet deep).
What is the power control unit?
During acceleration, the PCU coverts a battery’s electric power from DC to AC and then supplies power to the motor. During deceleration, it converts electric power from AC to DC to recover the regenerated electric power.
What is a power control system?
More Definitions of Power Control System Power Control System means systems or devices which electronically limit or control steady state. Sample 1. Power Control System . – means systems or devices which electronically limit or control the steady state AC currents, or DC currents, to a programmable limit or level.
What is the data rate for 3G?
The average speed of 3G connections is 3 megabits per second (Mbps), which was 30 times faster than 2G average speed of 100 kilobits per second (or 0.1 Mbps). Some 3G connections could achieve speeds of 7Mbps.
What is an RF pilot?
RF Pilot | Remote RF controller with display – ANTHRACITE The Remote RF controller with display is a central controller for switching electrical appliances and equipment, dimming lights, controlling blinds, etc. Designed in white and anthracite with colour OLED display.
What is Cpich power in 3G?
How does the PCM work?
How Does the PCM Work? The PCM receives signals from sensors that measure air flow into the engine and out the exhaust, the coolant temperature, how far down the accelerator pedals is, the speed at which each wheel is turning and other parameters.
Where is the PCM located?
The PCM is most often located in the engine bay near the fuse box or inside the car near the fuse box. It can often also be located under the front windshield behind some covers. There are a few different locations that the manufacturer can place your vehicle’s PCM, but the most common location is in the engine bay.
What is the power control mechanism of WCDMA?
In the WCDMA system, the power control mechanism comprises the following parts: Open-loop power control: Applicable in UL and DL. It sets the initial uplink and downlink transmit power. Open-loop power control is used on physical channels such as PRACH, DPCH. Inner-loop power control: Applicable in UL and DL.
What is the power control in CDMA?
CDMA – Power Control. In CDMA, since all the mobiles transmit at the same frequency, the internal interference of the network plays a critical role in determining network capacity. Further, each mobile transmitter power must be controlled to limit the interference.
How do you control the transmission power of a mobile network?
There are two ways to control the transmission power. First is the open-loop (Open Loop) control and second is closed-loop (Closed Loop) control. In addition to the near-far effect described above, the immediate problem is to determine the transmit power of the mobile when it first establishes a connection.
How to set the DPC mode in DL power control mode?
The DPC mode can be set by the DL POWER CONTROL MODE parameter. Parameter name DL power control mode Parameter ID DPCMODE GUI range SINGLE_TPC, TPC_TRIPLET_IN_SOFT, TPC_AUTO_ADJUST.