Method and device for reducing mutual interference of multiple carriers

A mutual interference and multi-carrier technology, applied in the field of multi-carrier mutual interference processing, to achieve the effect of improving flexibility, performance and business capacity

Active Publication Date: 2011-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no solution to the mutual interference of multi-carriers in the wireless communication system in the industry

Method used

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  • Method and device for reducing mutual interference of multiple carriers
  • Method and device for reducing mutual interference of multiple carriers
  • Method and device for reducing mutual interference of multiple carriers

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Embodiment Construction

[0035] The basic idea of ​​the present invention is: in a multi-carrier system, especially between adjacent multi-carriers in the frequency domain, there will be mutual interference among the carriers. The invention adjusts the phase of the modulated signal of each carrier to control the interference between multi-carriers to the level that can correctly demodulate the effective signal in the modulated signal. Since the phase of the modulated signal is related to the carrier frequency and initial phase of the carrier, and the carrier frequency is basically planned by the communication system, it is a non-adjustable parameter. Therefore, the present invention mainly adjusts the initial phase of the modulated signal To reduce the interference between multiple carriers. The scheme of the invention is simple and practical to implement.

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further de...

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Abstract

The invention discloses a method for reducing mutual interference of multiple carriers, comprising the following steps: adjusting the phase of the modulated signal; modulating the baseband signal to the modulated signal; and judging whether the baseband signal can be correctly demodulated, if not, continuously adjusting the phase of the modulated signal, and if so, taking the current phase value as the phase value of the modulated signal of the baseband signal. The invention simultaneously discloses a device for reducing mutual interference of the multiple carriers. The invention especially obviously improves the performance under the condition of adjacent configuration of multiple carriers, ensures that multiple carriers can simultaneously work in the same wireless signal coverage area and greatly improves the frequency spectrum utilization ratio.

Description

technical field [0001] The invention relates to a processing technology for multi-carrier mutual interference in a communication system, in particular to a method and device for reducing multi-carrier mutual interference. Background technique [0002] At present, most wireless communication systems can support a multi-carrier working mode. The multi-carrier mode means that both transmission and reception will be combined waves of multiple single carriers. For example, for a CDMA2000 1x communication system in the 800MHz frequency band, the bandwidth of a single carrier is 1.23MHz, and the center frequency interval of adjacent carriers is 1.23MHz, so when multiple carriers such as three carriers are adjacent to each other, they are three single carriers with a bandwidth of 1.23MHz. A combined wave occupying a bandwidth of about 3.69MHz is formed, and the center frequencies of the three carriers can be set to 871.11MHz, 872.34MHz, and 873.57MHz (or other frequencies). figure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00
CPCH04L5/0021H04J11/0023H04L25/03821H04L27/2647
Inventor 毕文仲劳锦明李凡龙
Owner ZTE CORP
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