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Signal sequence processing method and base station

A technology of signal sequence and processing method, applied in the field of communication, can solve the problems of sudden change of power amplifier model, difficult to effectively correct the pre-distortion model, etc., and achieve the effect of optimizing matching.

Active Publication Date: 2012-10-31
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] However, during the research process of realizing the present invention, the inventor found that the prior art has the following defects: many of the current wireless communication services are bursty, which makes the power amplifier model realized by the power amplifier module also mutate
Due to the sudden change of the service signal and the power amplifier model, it is difficult to effectively modify the pre-distortion model to match it with the power amplifier module

Method used

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  • Signal sequence processing method and base station
  • Signal sequence processing method and base station
  • Signal sequence processing method and base station

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Embodiment 1

[0034] figure 1 It is a flow chart of the signal sequence processing method provided in Embodiment 1 of the present invention, and the method is applicable to Figure 2A The power amplifier predistortion system shown. Such as Figure 2A As shown, the predistortion system generally includes a predistortion module 210 , a power amplifier module 220 and a model correction module 230 . The predistortion module 210 has a predistortion model, and the power amplifier module 220 implements the power amplifier model in the form of hardware and / or software. The non-linear characteristics of the power amplifier module may be as Figure 2B As shown, the signal characteristics after predistortion are as follows Figure 2C As shown, after pre-distortion processing and power amplification, it is formed Figure 2D A theoretically undistorted signal is shown. Figure 2A The predistortion system shown is a logical structural relationship, and when it is implemented by hardware, it is not ...

Embodiment 2

[0056] Embodiment 2 of the present invention provides a signal sequence processing method. In practical applications, there are many ways to form a training signal with set signal attributes, and this embodiment is one of the preferred ways, that is, the operation of forming a training signal with set signal attributes in the acquired signal sequence is as follows:

[0057] A training signal is added in the free time slot of the acquired signal sequence, and the training signal is set to have a set transmission power, a set frequency point and / or a set bandwidth.

[0058] The technical solution of this embodiment is easier to implement. According to the provisions of the communication protocol, some idle time slots are often reserved in logic signals, and the positions of these idle time slots are fixed and predictable according to the protocol. Adding training signals in these free time slots does not affect the transmission of existing service signals, and the power, freque...

Embodiment 3

[0063] Embodiment 3 of the present invention provides a signal sequence processing method. The difference between this method and Embodiment 2 lies in the method of forming the training signal. That is, the operation of forming a training signal with set signal attributes in the acquired signal sequence is specifically: detecting a service signal with set transmit power, set frequency point and / or set bandwidth in the acquired signal sequence, as the set the training signal.

[0064] In this embodiment, service signals that meet the set requirements are actively selected as training signals by detecting service signals. In this way, factors such as power, bandwidth, and frequency point of the training signal can meet the requirements of detection and correction, and existing service signals can not be affected.

[0065] Preferably, the operation of forming a training signal with a set signal attribute in the acquired signal sequence is specifically: detecting a service signal...

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Abstract

Disclosed are a signal sequence processing method and a base station. The method includes: obtaining a signal sequence; forming a training signal with a set signal attribute in the obtained signal sequence; pre-distorting the signal sequence formed with the training signal using a pre-distortion model; amplifying the pre-distorted output signals using a power amplification module and then outputting the same; collecting the amplified training signal in the signal sequence amplified and outputted by the power amplification module; and modifying the pre-distortion model according to the collected training signal. In the present invention, by forming a training signal meeting the set requirements, the signal attribute of the training signal can be controlled actively; and the above solution is adapted to the feedback requirements on the modification of the pre-distortion model, so that the nonlinear features of the training signal after power amplification can be collected timely and effectively to modify the pre-distortion model, optimizing the compatibility of the pre-distortion model and the power amplification module.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a signal sequence processing method and a base station. Background technique [0002] The power amplifier module used in wireless communication usually implements the required power amplifier model in the form of hardware combined with software. However, the power amplifier module used in practice usually has the problem of nonlinear amplification of the signal sequence. The distortion algorithm is used to correct the nonlinearity of the power amplifier module. According to the realization method of the pre-distortion model, it can be divided into analog and digital. Currently, a digital pre-distortion algorithm (Digital Pre-Distortion, DPD for short) is widely used. [0003] In practical applications, the nonlinear characteristics of the power amplifier module are not always constant, but change with factors such as temperature, frequency, and time, so the...

Claims

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Application Information

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IPC IPC(8): H04L25/49H04W88/08
CPCH04L27/368H04L25/49
Inventor 郭江唐海正李应希
Owner HUAWEI TECH CO LTD
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