The Xilinx DPD solution consists of the following sections:
1) Predistorter.
2) Capture buffer (4K of storage space). Sampled data used to store the transmit and feedback paths.
3) SCA measurement.
4) Parameter estimator. An inverse model for adaptively computing power amplifiers for transmit and feedback sampled data in a given capture buffer based on least squares or damped Newtonian algorithms. This part is done by the MicroBlaze processor. Belongs to the DPD software section.
The framework is in the attached picture, because I don't know how to insert a picture into the blog, I can only do this for the time being.
The module implemented in the software category is the "parameter estimator" mentioned above, and its main body is the MicroBlaze processor.
The MicroBlaze processor has 64K of internal RAM memory and 32KB of capture RAM. The software on this platform is provided by Xilinx.
After a thorough test. They perform a variety of control and user interfaces that provide monitoring operations.
The content of the DPD software implementation includes the following parts:
1) Estimated function ECF: Aligns the amplitude, delay, and phase of the transmitted and received data. The coefficient estimation is performed after these tasks are completed.
2) Quadrature modulation correction QMC: After transmitting and receiving data align, the correction of the quadrature modulator is performed. The principles and algorithms are described in the documentation.
3) Sampling Capture Decision SCA: This section uses the average power, the amplitude histogram of the captured data relative to the average signal to capture an accurate estimate.
4) Power amplifier overload detection ODD: According to the EPD pre-distortion coefficient estimated by the ECF, predict whether the peak of the signal to be transmitted makes the power amplifier enter the saturation region and give corresponding indication.
5) Dynamic Control Layer DCL: Measure the average transmit power while distorting according to the distortion characteristics of the amplifier
Function description
The socket is ordinary converter,with two output 5V2A power USB power supply at the same time,can be very convenient in use electrical appliances and recharge the equipment at the same time,such as digital products like Iphone Ipad,MP3,MP4 etc.The charge apply to full range of international AC output,no-load power consumption less than 0.3W,with short circuit,overload,over-voltage protection,can be convenient for your life and save more energy
Timer Control Time Adgustment
1.Press the power switch 1 time,the 1HOUR LED will light on.The Timer into ON mode,USB and control socket output ON .
2.Continuously press the power switch the LED light on,the Countdown mode and LED light on will cycle change from 1HR,2HR,4HR,6HR,8HR,10HR.
3.Choose you need countdown time mode,the mode LED will lighto on,start countdown until countdown time finish,the control output and USB change to OFF
4.Then the countdown is start,The Time indicate LED will from high to low auto change until Countdown finish off.
Failure analysis:
1.check whether the power supply connection is good
2.check whether the USB cable is loosen
Warning Note:
1.Use indoor and dry location ONLY
2.The load max does not exceed 15A 3600W
3.This product does not convert voltage please do not miss use DO NOT exceed the maximum loading of 3600 Watts 15A
4.Always have earth connection for safety reason
5.If in doubt please consult with a qualified electrician
USB countdown timer, USB countdown timer socket, USB timer, USB charger timer, USB timer socket
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