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GSM multi-carrier transmitter

A transmitter and multi-carrier technology, applied in the field of communication, can solve the problems of high cost, carrier mirroring each other, complex structure, etc.

Inactive Publication Date: 2018-11-16
JIANGSU ZHUODA INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a GSM multi-carrier transmitter, which is used to solve the problems of complex structure, high cost, and mutual mirroring of carriers in the GSM multi-carrier implementation scheme in the prior art

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Embodiment Construction

[0031] The embodiment of the present invention provides a GSM multi-carrier transmitter to solve the problems of complex structure, high cost, and mutual mirror image of the GSM multi-carrier implementation scheme in the prior art.

[0032] In wireless communication systems, signal reception and transmission performance are the main indicators that test the performance of the communication system. With the progress of society and the rapid development of mobile communication, mobile communication equipment has higher and higher requirements for system integration. Superheterodyne transceivers require multiple local oscillators, intermediate frequency filters and other peripheral components, and the integration is low , It occupies a large area and cannot adapt to the integration requirements of mobile communication equipment; while the traditional zero-IF transceiver realizes GSM multi-carrier, its multi-carrier distribution diagram is as follows figure 1 As shown, so many carrier...

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Abstract

An embodiment of the invention relates to the field of communication, in particular to a GSM multi-carrier transmitter, and is used for providing a GSM multi-carrier implementation scheme which can guarantee the anti-interference capability in the signal transmission process and can achieve the purpose of reducing structural complexity of the system without forming mirror images among the multiplecarriers. In the GSM multi-carrier transmitter, a multi-path near-zero intermediate frequency signal conversion module is used for shifting frequencies of I and Q orthogonal analog signals of a baseband signal to a near-zero intermediate frequency so as to form a multi-path near-zero intermediate frequency signal, wherein the near-zero intermediate frequency is 1020 MHz; a multi-path RF signal conversion module is configured to receive and utilize the multi-path near-zero intermediate frequency signal to form a multi-path transmission radio frequency signal; and a transceiver is configured to receive and transmit the multi-path transmission radio frequency signal, so that mirror images cannot be formed among the GSM multiple carriers, and the system complexity is reduced.

Description

Technical field [0001] The embodiment of the present invention relates to the field of communications, and in particular to a GSM multi-carrier transmitter. Background technique [0002] As the data rate increases, when the signal bandwidth is greater than the coherent bandwidth of the channel, the ISI (Inter Symbol Interference) in the traditional GSM single-carrier system becomes extremely serious, which affects the quality of signal transmission. The system can convert high-speed serial data streams into several low-speed data streams, modulate several carriers at the same time, and reduce ISI through channel delay expansion. Therefore, the GSM multi-carrier system has become a research hotspot for professionals. [0003] In the prior art, some of the GSM multi-carrier systems are realized by superheterodyne, and some are realized by the zero-IF scheme. However, the superheterodyne and zero-IF schemes both have certain problems in implementing multi-carrier, such as superheterod...

Claims

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Application Information

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IPC IPC(8): H04B1/40
CPCH04B1/40
Inventor 王涛
Owner JIANGSU ZHUODA INFORMATION TECH CO LTD
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