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Communication apparatus based on multi-carrier modulation system with simultaneous transmission and reception in the same frequency band

A technology of multi-carrier modulation and communication device, applied in multi-frequency code system, transmission path separation device, transmission system and other directions, can solve the problems of suppression, not considering reception, etc.

Inactive Publication Date: 2007-10-31
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the above-mentioned JP-A 2001-285236 only makes specific subcarriers empty, but does not consider receiving the desired signal while the signal is being transmitted
Therefore, the above-mentioned JP-A 2001-285236 still involves the problem that the reception signal to be received by subcarriers in which the sidelobe components of its own subcarriers to be transmitted are nullified is suppressed

Method used

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  • Communication apparatus based on multi-carrier modulation system with simultaneous transmission and reception in the same frequency band
  • Communication apparatus based on multi-carrier modulation system with simultaneous transmission and reception in the same frequency band
  • Communication apparatus based on multi-carrier modulation system with simultaneous transmission and reception in the same frequency band

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Embodiment Construction

[0030] The communication device of the present invention can obtain high-quality reception characteristics in its own station and other stations by introducing the above-mentioned structure by simultaneously performing transmission and reception in a multi-carrier modulation system, and the sidelobe components of subcarriers caused by transmission are not large. Any suppression of desired received signals to its own station or to other stations.

[0031] Preferred embodiments of the present invention will be described with reference to the drawings. However, the preferred embodiments do not limit the technical scope of the present invention.

[0032] In a preferred embodiment of the present invention, a communication device based on a multi-carrier modulation system is described below.

[0033] Fig. 4 shows the principle of the communication system of the present invention.

[0034]Letter C in FIG. 4( a ) indicates a frequency band for transmission in the frequency domain of...

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Abstract

A communication apparatus based on the multi-carrier modulation system may be included in a mobile station or a base station for simultaneous transmission and reception with a simplified structure between the mobile station and base station using in common the same frequency band. A communication apparatus based on a multi-carrier modulation system for simultaneous communications with a plurality of sub-carriers using a plurality of sub-carriers modulated with data respectively, comprising a transmitting unit operable to transmit data with a plurality of sub-carriers by modulating a sub-carrier among the plurality of sub-carriers with data, and operable to use the other sub-carriers a receiving band without modulation with the data.

Description

technical field [0001] The present invention relates to a communication device based on a multi-carrier modulation system for two-way communication using multiple sub-carriers, and more particularly to a communication device based on a multi-carrier modulation system for avoiding signals from other communication devices (such as base stations or mobile station) or prevent the transmission signal of the workstation from spreading to the receiving side of the station to achieve simultaneous transmission and reception. Background technique [0002] Conventional mobile communication basically uses the same communication system as that used for communication with fixed stations, in which various mobile communications using mobile stations such as cellular phones etc. have been put into practical use in recent years middle. [0003] For example, FIG. 1 shows an application example in which there is no problem in frequency domain and time domain for transmission and reception betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04Q7/22
CPCH04L5/0007H04L5/0044H04B1/56
Inventor 沢田健介
Owner FUJITSU LTD