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Gsm and CDMA mode conversion device

A mode conversion and mode technology, applied in the direction of selection devices, branch equipment, electrical components, etc., can solve problems affecting call quality, reduce receiving sensitivity, reduce CDMA transceiver rate, etc., to improve call quality, improve performance, and improve harmonics problem effect

Inactive Publication Date: 2006-09-06
INSPUR LG DIGITAL MOBILE COMMUNICATIONS CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0011] 1. In the case of using a CDMA-specific SP3T switch, since the maximum output power in GSM mode is 34dBm, and the maximum output power in CDMA mode is 24dBm, when using GSM mode, the above-mentioned SP3T switch will pass the above-mentioned maximum The output power reaches saturation, which will increase the second and third harmonic components (frequency), which will affect the quality of other people's calls
[0012] 2. In the case of using the special SP3T switch for GSM, due to the insufficient margin of the CDMA single tone, it will lead to the reduction of the receiving sensitivity spectrum or the failure of signal reception
And, it may also reduce the CDMA transceiver rate in the domain

Method used

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  • Gsm and CDMA mode conversion device
  • Gsm and CDMA mode conversion device
  • Gsm and CDMA mode conversion device

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Embodiment Construction

[0025] Beneficial embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] First, when referring to components in each drawing, the same components in the present invention are given the same symbols as much as possible even if they are shown in different drawings.

[0027] In addition, detailed descriptions of well-known functions and configurations will be omitted in order to clarify the basic technical idea of ​​the present invention.

[0028] image 3 It is a structural block diagram of the mobile communication terminal in the present invention. As shown in the figure, it comprises: the CDMA part 30 that executes the CDMA mode function; the GPS part 40 that executes the GPS function; The CDMA part 30 or the GPS part 40 are selectively connected to the SP2T switch 70 of the external mode changeover switch described later; through the corresponding hardware drive of the user's selection operation, the abov...

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Abstract

The invention discloses a change-over device for GSM / CDMA mode which belongs to one of the multimode change-over device of mobile communication terminal. The mobile communication terminal installed with CDMA part which can execute CDMA mode function and GSM part which can execute GSM mode function includes: external mode changing switch which can selectively connect the said GSM part or CDMA part to the antenna in accordance with the hardware activation corresponding with the subscriber option. It also includes: a CDMA special-purpose SP2T switch which can selectively connect the said GPS part or CDMA part to the said external mode changing switch or a GSM special-purpose SP2T switch which can selectively connect the said GPS part or CDMA part to the said external mode changing switch. The invention can support multimode mobile communication terminal in global hand-micro-telephone, can improve the mode corresponding performance and can easily perform mode conversion operation, and can improve the receiver performance of CDMA mode to improve the speaking quality.

Description

technical field [0001] The present invention belongs to the multi-mode conversion device of mobile communication terminal, particularly relates to GSM and CDMA mode conversion device, more specifically is to make global mobile phone (global phone) can support multiple modes in mobile communication terminal by the device of the present invention, can improve mode Corresponding characteristics and easy mode conversion operation. Background technique [0002] Recently, with the development of global mobile phones, the demand for global mobile phones has also continued to increase. The above-mentioned global mobile phones have built-in CDMA modules, GSM modules and GPS modules, and can choose a specific one of the above three modes according to the user's choice of operation. model. Wherein, in order to select the above three modes, the SP3T switch as a soft (software) switch method is used in the prior art. [0003] figure 1 It is a block diagram of a mobile communication te...

Claims

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Application Information

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IPC IPC(8): H04Q7/32H04B1/40H04B1/44
CPCH04B1/44H04M1/026H04W88/06
Inventor 方成恩
Owner INSPUR LG DIGITAL MOBILE COMMUNICATIONS CO LTD
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