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Carrier frequency offset processing method and device and receiver

A technology of carrier frequency offset and processing method, applied in modulation carrier system, resonant circuit with a central processing unit, digital transmission system, etc., can solve the problem of low-pass filter affecting processing performance, etc.

Active Publication Date: 2017-08-29
SHANGHAI EASTSOFT MICROELECTRONICS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a carrier frequency offset processing method, device, and receiver to solve the problem that the fixed bandwidth of the low-pass filter affects processing performance in the presence of carrier frequency offset, so as to realize Dynamically adjust the bandwidth of the low-pass filter

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  • Carrier frequency offset processing method and device and receiver
  • Carrier frequency offset processing method and device and receiver
  • Carrier frequency offset processing method and device and receiver

Examples

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Embodiment 1

[0025] figure 1 It is a flowchart of a carrier frequency offset processing method provided by Embodiment 1 of the present invention. The method of this embodiment is applicable to the case where there is a carrier frequency offset at the receiver. The method is executed by a carrier frequency offset processing device, which is usually implemented in software and integrated in a receiver. The method of the present embodiment comprises the steps:

[0026] Step 101: Receive the packet frequency offset estimation value sent by the automatic frequency offset control module through the software and hardware interface.

[0027] In this embodiment, the specific algorithm for the estimated value of the packet frequency offset can maintain the original method of the system. For example, for frequency-shift keying (Frequency-shift keying, FSK for short), the frequency can be estimated by calculating the average value of the maximum and minimum frequency differences. For phase-shift ke...

Embodiment 2

[0037] figure 2 It is the flow chart of Embodiment 2 of the carrier frequency offset processing method of the present invention. On the basis of Embodiment 1, this implementation adds the feedback of the carrier frequency offset software estimated value to the local oscillator and the carrier frequency offset software estimated value. The update steps, as shown in the figure, the method specifically includes:

[0038] Step 201, receiving the packet frequency offset estimation value sent by the automatic frequency offset control module through the software and hardware interface

[0039] Step 202: Select the average value of estimated frequency offset values ​​of multiple received data packets as the statistical value of carrier frequency offset between transceiver modules.

[0040] Step 203: Periodically update the carrier frequency offset statistical value according to the carrier frequency offset hardware estimated value received based on the software and hardware interfac...

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Abstract

The invention provides a carrier frequency offset processing method and device and a receiver. The carrier frequency offset processing method of the present invention includes: receiving the estimated frequency offset value of the data packet sent by the automatic frequency offset control module through the software and hardware interface; collecting and counting the estimated frequency offset value of the received data packet, and calculating the frequency offset value of the transceiver module The statistical value of the carrier frequency offset; dynamically adjust the bandwidth of the low-pass filter through the software and hardware interface according to the statistical value of the carrier frequency offset. The present invention calculates the statistical value of the carrier frequency offset between the transceiver modules and dynamically adjusts the bandwidth of the low-pass filter through the software and hardware interface according to the statistical value of the carrier frequency offset, so that the receiver can dynamically adjust the low-pass filter in the process of receiving signals. The bandwidth of the filter solves the problem in the prior art that affects the processing performance caused by the fixed bandwidth of the low-pass filter.

Description

technical field [0001] Embodiments of the present invention relate to wireless communication transmission technologies, and in particular to a method and device for processing carrier frequency offset and a receiver. Background technique [0002] In wireless communication, due to the deviation of the crystal oscillator frequency at both ends of the transceiver or some other factors (such as the difference between the system and the circuit or the difference in the working environment), the carrier frequency of the sending signal is not exactly the same as the local oscillator frequency of the receiving end, resulting in Carrier frequency deviation at both ends. Moreover, the offset frequency at both ends may also change with time and changes in the external environment, forming a phenomenon of carrier frequency offset drift. Carrier frequency offset is also a common phenomenon in wireless communication. [0003] In the currently used wireless receiving system, a low-pass f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H04L27/00H04L25/02
CPCH04B1/1027H03J1/0008H04L27/148H04L27/152
Inventor 沈力为刘瑞金张晓诗潘松
Owner SHANGHAI EASTSOFT MICROELECTRONICS
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