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Method and device for reducing mutual interference of multiple carriers

A mutual interference and multi-carrier technology is applied in the field of multi-carrier mutual interference processing to achieve the effects of improving flexibility, business capacity and spectrum utilization

Inactive Publication Date: 2014-02-05
NANTONG HAITIAN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no solution for multi-carrier mutual interference in wireless communication systems, especially in CDMA systems, where multi-carrier EV-DO is adjacently configured.

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

[0037] 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 present invention makes the performance index of each modulation signal meet the set performance index by adjusting the phase of the modulated signal of each carrier. 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.

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following...

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Abstract

A method for decreasing multi-carrier mutual interference is disclosed, which includes that: a phase of at least one signal to be modulated is adjusted; each baseband signal is modulated onto each signal to be modulated respectively; the inter-signal performance indicators after modulation are compared with preset performance indicators, and if the preset performance indicators cannot be met, the phase of at least one signal to be modulated among the signals to be modulated is adjusted until that the inter-signal performance indicators meet the preset performance indicators; when the preset performance indicators are met, each current signal to be modulated is treated as the signal to be modulated for each corresponding baseband signal. Meanwhile, a device for decreasing the multi-carrier mutual interference is disclosed in the invention. Under the condition that the multiple carriers are configured adjacently, the performance improvement by the present invention is especially obvious, and it is made possible that there are multiple carriers working simultaneously within a same wireless signal coverage area, and the frequency spectrum utilization efficiency is greatly increased.

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 CDMA2000lx 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 adjacently configured, they are composed of three single carriers with a bandwidth of 1.23MHz A combined wave occupying a bandwidth of about 3.69MHz, the center frequencies of the three carriers can be set to 871.11MHz, 872.34MHz, 873.57MHz (or other frequencies). figure 1 It is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/00H04B7/26
CPCH04L27/2626H04L25/03343
Inventor 李凡龙劳锦明毕文仲
Owner NANTONG HAITIAN BIOTECH
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