Linearization device and linearization method in broad band multicarrier communication system
A multi-carrier communication and linearization technology, applied in the field of communication, can solve the problems of slow convergence speed, increased number of updated tap groups, low convergence accuracy, etc., achieve small error, eliminate nonlinear distortion with memory, bit error rate performance Good results
Inactive Publication Date: 2012-11-14
XIDIAN UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Because this method uses the same number of tap coefficients as the number of lookup tables, the number of tap groups that need to be updated is greatly increased; at the same time, an indirect learning structure is used to update the filter tap coefficients, resulting in slow convergence speed and low convergence accuracy. Shortcomings
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] refer to figure 2 , the device of the present invention includes a signal trimmer 101, an adaptive filter 102, an amplifier 103, an attenuator 104, a tap coefficient updater 105, and a lookup table updater 106, wherein the adaptive filter 102 is connected in series after the signal trimmer 101, Carry out signal trimming and filtering processing on the signal respectively; the amplifier 103 is connected in series after the adaptive filter 102, amplifies the signal, and then divides into two paths, one path is sent to the channel for transmission, and the other path is sent to the feedback branch; the attenuator 104 is connected in series After the amplifier 103, the feedback signal is attenuated to the level before amplification, and output to the tap coefficient updater 105 and the look-up table updater 106; the tap coefficient updater 105 is connected between the attenuator 104 and the signal trimmer 101, For the update value of adaptive filter 102 output filter tap c...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a linearization device with a memory non-linear amplifier and a linearization method in a broad band multicarrier communication system, and the linearization device comprises a signal trimmer, a self-adapting wave filter, the amplifier, a fader, a tapping coefficient renovator and a request form renovator, wherein transmission signals are respectively reconditioned and filtered by the signal trimmer and the self-adapting wave filter and are output to the amplifier for amplification, then the signals are divided into two groups, one group is sent into a channel for transmission, the other group is sent into the fader until reduced to the electrical level before amplifying, and the signals are further output to the tapping coefficient renovator and the request form renovator to respectively renew the tapping coefficients of the wave filter, amplitude request forms and phase request forms. By repeating the steps and continuously renewing the amplitude request forms, the phase request forms and the tapping coefficients of the wave filter as well as reconditioning and refiltering generated transmission signals, the linearization function of the amplifier in the broad band multicarrier communication system can be realized through the repetition of the steps. The linearization device and method in the broad band multicarrier communication system have the advantages of fast convergence rate, high convergence accuracy and high linearization level.
Description
technical field [0001] The invention belongs to the technical field of communication, and relates to an amplifier linearization device and method in a broadband multi-carrier communication system, which can be used for eliminating nonlinear distortion of amplifiers with memory in the broadband multi-carrier communication system. Background technique [0002] Power amplifiers are one of the main components of modern communication systems. Commonly used amplifiers include solid-state power amplifiers and traveling wave tube amplifiers. The solid-state power amplifier is an amplifier with less distortion, but its efficiency is low; while the traveling wave tube amplifier is an amplifier with high efficiency, but the nonlinear distortion is quite significant. Usually, more attention is paid to the efficiency of amplifiers for communication systems, so amplifiers with significant nonlinear distortion are often used, and the problem of dealing with nonlinear distortion of amplifie...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L27/26
Inventor 张海林任智源武德斌卢小峰
Owner XIDIAN UNIV