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Multi-mode terminal of global mobile communication system wide-band CDMA

A global mobile communication, broadband code division multiple access technology, applied in the direction of transmission system, wireless communication, radio/inductive link selection arrangement, etc., can solve the problem of insufficient transmission capacity of mobile network

Inactive Publication Date: 2006-04-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the current and future demand for multimedia performance of mobile phones, data and video access and voice transmission in communication services, the current transmission capacity of mobile networks will soon become insufficient

Method used

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  • Multi-mode terminal of global mobile communication system wide-band CDMA
  • Multi-mode terminal of global mobile communication system wide-band CDMA

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Embodiment Construction

[0026] Various preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] The multimode terminal of the global system for mobile communication / wideband code division multiple access of the present invention, as figure 1 and figure 2 Shown describes a multi-mode communication system according to the present invention, figure 1 is a block diagram of a multi-mode communication system 100 according to one embodiment of the present invention, which includes a delta-sigma modulator 102, an 8-bit analog-to-digital converter (ADC) 104, sequential convolution units 106, 108, and 110, and a mode selection unit 112. The first and second switch units 120 and 1300, when working in the GSM mode, the 4-E modulator 102 converts the input analog signal into a 1-bit digital signal to generate a 1-bit symbol for each cycle. The 8-bit analog-to-digital converter 104 samples the analog signal, and converts the 30-samp...

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Abstract

A multimode terminal of GSM / wideband CDNA consists of a switching over component for switching over received analog signal to delta-sigma modulator in GSM mode and for switching over received analog signal to A / D converter in wideband CDMA mode, convolution module for multiplying filter coefficient with output of delta-sigma modulator to generate GSM mode waveform and for multiplying PN code with A / D converter output in wideband CDMA mode to generate wideband CDMA mode output waveform, and output component for outputting GSM mode waveform to restore GSM mode output waveform after preset delay and for outputting wideband CDMA output waveform in wideband CDMA mode under free preset delay way.

Description

technical field [0001] The invention relates to a multimode terminal, in particular to a multimode terminal which can work in GSM / WCDMA mode. Background technique [0002] Global System for Mobile Communications (hereinafter GSM) is an international standard for cellular services used in certain parts of the world. For example: GSM operates in the 900MHz frequency band (890MHz-960MHz) in Europe and Asia, and in the 1900MHz frequency band (sometimes called 1.9GHz) in the United States. With the current and future demands on the multimedia performance of mobile phones, data and video access and voice transmission in communication services, the current transmission capacity of mobile networks will soon become insufficient. [0003] The Universal Mobile Telecommunications System (hereinafter referred to as UMTS) is a global wireless multimedia system that provides wireless communication with very fast data transmission and provides users with more flexible functions in the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04Q7/32H04W88/06
Inventor 王毅
Owner ZTE CORP