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Adjacent channel interference suppression method and system, receiver and communication system

An adjacent frequency interference and receiver technology, applied in transmission systems, transmission monitoring, electrical components, etc., can solve the problem that the out-of-band interference suppression performance cannot meet the actual needs, etc., to improve the out-of-band suppression performance, improve the accuracy, solve the The effect of strong interference performance deterioration

Active Publication Date: 2020-07-31
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the out-of-band interference suppression performance of the receiver in the prior art cannot meet the actual needs, and the purpose is to provide a method and system for adjacent-frequency interference suppression, a receiver and a communication system

Method used

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  • Adjacent channel interference suppression method and system, receiver and communication system
  • Adjacent channel interference suppression method and system, receiver and communication system
  • Adjacent channel interference suppression method and system, receiver and communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as figure 1 As shown, the adjacent frequency interference suppression method of the receiver in this embodiment includes:

[0065] S101. Obtain the current receiving gain table in the receiver in the adjacent channel interference scenario;

[0066] S102. Calculate and obtain the gain linearity of the low noise amplifier in the receiver at the gain mode switching point according to the current receiving gain table;

[0067] S103. Determine whether the gain linearity is within a preset range, if not, adjust the current receiving gain table to generate a target receiving gain table;

[0068] Wherein, under the target receiving gain table, the gain linearity of the low noise amplifier at the switching point of the gain mode is within a preset range;

[0069] S104. Perform adjacent-channel interference suppression according to the target receiving gain table.

[0070] Wherein, in the target receiving gain table, the absolute value of the difference between the gain v...

Embodiment 2

[0073] Such as figure 2 As shown, the adjacent frequency interference suppression method of the receiver in this embodiment is a further improvement on Embodiment 1, specifically:

[0074] Before step S101, it also includes:

[0075] S10101. Obtain a received signal strength parameter in the receiver;

[0076] S10102. Determine whether the received signal strength parameter meets the set condition, and if so, determine that the receiver is in an adjacent-channel interference scenario.

[0077] Specifically, step S10101 includes:

[0078] The first RSSI corresponding to the radio frequency receiver and the second RSSI corresponding to the digital receiver in the receiver are acquired.

[0079] Step S10102 includes:

[0080] Judging whether the difference between the first RSSI and the second RSSI is greater than the set threshold, if so, then determine that the receiver is in an adjacent channel interference scenario; if not, then determine that the receiver is in a non-ad...

Embodiment 3

[0112] Such as image 3 As shown, the adjacent frequency interference suppression system of the receiver in this embodiment includes a gain table acquisition module 1 , a gain linearity calculation module 2 , a first judgment module 3 and an interference suppression module 4 .

[0113] In the adjacent frequency interference scenario, the gain table acquisition module 1 is used to obtain the current receiving gain table in the receiver;

[0114] The gain linearity calculation module 2 is used to calculate the gain linearity of the low noise amplifier in the receiver at the gain mode switching point according to the current receiving gain table;

[0115] The first judging module 3 is used to judge whether the gain linearity is within a preset range, if not, adjust the current receiving gain table to generate a target receiving gain table;

[0116] Wherein, under the target receiving gain table, the gain linearity of the low noise amplifier at the switching point of the gain mod...

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Abstract

The invention discloses an adjacent channel interference suppression method and system, a receiver and a communication system, and the method comprises the steps: obtaining a current receiving gain table in the receiver in an adjacent channel interference scene; calculating the gain linearity of a low-noise amplifier in the receiver at the gain mode switching point according to the current receiving gain table; judging whether the gain linearity is within a preset range or not, and if not, adjusting the current receiving gain table to generate a target receiving gain table; and performing adjacent channel interference suppression according to the target receiving gain table. According to the invention, on the premise that the algorithm processing complexity and the production line cost arenot increased, based on an existing receiving gain table and baseband demodulation capability, the influence of a radio frequency front-end device and matching on the receiving gain linearity of thewhole receiving path of the receiver can be reduced, so that the out-of-band rejection performance of the receiver in a communication system is effectively improved, and the problem that the strong interference performance of adjacent cells is deteriorated under actual network configuration is solved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for suppressing adjacent frequency interference, a receiver and a communication system. Background technique [0002] The receiver in the communication system controls the received RSSI (Received Signal Strength Indication) by adjusting the gain configuration of the receiving path to ensure that the received signal strength is maintained at a fixed value. The general form of receiving channel gain is a receiving gain table with fixed steps (take 3dB steps as an example), and the gain required to cover normal communication receivers can be achieved by adjusting the LNA (low noise amplifier) ​​gain mode and other digital gain configurations on the link range, where LNA characteristics have the greatest impact on out-of-band interference. [0003] However, in the actual signal transmission scenario, there will always be a strong interference cell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04B17/318
CPCH04B1/10H04B1/1027H04B17/318
Inventor 陶峰刘入忠
Owner SPREADTRUM COMM (SHANGHAI) CO LTD