he principle of power control here is not limited to a specific communication system, but is a general basic principle.
Forward and reverse power control: adjusting the power of the base station and the UE respectively, which is better understood.
Open-loop and closed-loop power power control.
Open-loop: is power control without feedback. An initial transmit power is estimated by calculating the strength of the received signal. It is then sent, and if no response is received, the power is increased again and the transmission is carried out.
Closed loop: Closed loops are divided into inner and outer loops. Their common feature is that they have feedback on the signal power. The inner loop is that after the sender sends, the receiver compares the measured power with the power the sender expects to send to see if it is equal and then adjusts it, while the closed loop compares the BER of the received signal with a threshold and informs the sender to increase the power if the BER is too high.
As can be seen, the latter calculation requires demodulation of the baseband to work, so it is more complex and slower to adjust, while the former calculation is relatively simple and fast to adjust.
The working parameters are entered by the keyboard. 1. Easy push-button programming settings, built-in quick configuration menu, all-digital operation, superior performance and easy to use. 2. Advanced technology used by the controller to control the measurement process with multi-parameter operation. 3. 3. Self-diagnostic system, capable of judging and processing ten types of faults and displaying them. 4. Automatic lower limit reversing function, avoiding the hammer from dropping into the lower material port when the storage is empty. 5. Manual and automatic operation is possible, and remote interface is provided, which can be connected to PLC and DCS. 6. Special electromechanical structure design of the probe and its matching proprietary programming design, effectively overcoming water hardness substances (e.g. cement, coal dust, clay). 7. Three operating modes are set: NORM; AMAP; PHDT with automatic phase sequence detection function. 8. Non-measurement state limit time withdrawal function ensures automatic recovery of normal operation even in case of misoperation. 9. The upper limit of the level meter probe has automatic cleaning function to overcome the influence of dusty environment. 10. 10. Aluminium alloy level meter probe, no rust corrosion. 11. Separate electromechanical structure, can adapt to high temperature silo measurement. 12. Simple and effective probe design, extremely convenient to use and maintain. 13. For powder silo measurement, there are soft measuring hammer for optional, effective protection of unloading equipment. 14. level measurement, especially suitable for. Powder level measurement and bulk material measurement.
Open-loop and closed-loop power power control.
Open loop: is power control without feedback. An initial transmit power is estimated by calculating the strength of the received signal. It is then sent, and if no response is received, the power is increased again and the transmission is carried out.
Closed loop: Closed loops are divided into inner and outer loops. Their common feature is that they have feedback on the signal power. The inner loop is that after the sender sends, the receiver compares the measured power to the power the sender expects to send to see if it is equal and then adjusts it, while the closed loop compares the BER of the received signal to a threshold and informs the sender to increase the power if the BER is too high.
VMIVME-7750
IS220PVIBH1A
IS420UCSCH2A
5SHY3545L0010 3BHB013088R0001
3BHE009681R0101 GVC750BE101
ICS TRIPLEX T8310
ICS TRIPLEX T8461
ICS TRIPLEX T8151B
ICS TRIPLEX T8403C
ICS TRIPLEX T8311
ICS TRIPLEX T9402
ICS TRIPLEX T9451
IS215VCMIH2BB
IS215VCMIH2CA
ABB PM866K01 3BSE050198R1
ABB 216NG63
ABB 216VC62a
ABB 216EA61b
ABB 216AB61
ABB 216DB61
ABB REG216
PC control module, is based on PC as a basic development of a control terminal. PC control module is a programmable controller, is used for communication between PC and PC station terminal, mainly used to achieve control data communication function. PC control module has powerful functions, good compatibility, high security, cheap price, simple maintenance, support industrial environment and other characteristics. According to customer requirements for secondary development and production, with high cost performance. PC control module through serial communication technology and analog/digital communication technology and PLC, MCU and other control equipment to achieve communication, can be used in PLC, MCU and other control equipment.
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