CN201278523Y

CN201278523Y - Wireless data card

Info

Publication number: CN201278523Y
Application number: CNU2008201372410U
Authority: CN
Inventors: 陈建强; 胡易木
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-09-24
Filing date: 2008-09-24
Publication date: 2009-07-22
Anticipated expiration: 2018-09-24

Abstract

The utility model discloses a wireless data card which comprises a time-division synchronous code division multiple access (TD-SCDMA) dispatching antenna, a TD-SCDMA radio frequency transmitting and receiving module and a TD-SCDMA baseband processing module which are sequentially connected, and also comprises a China mobile digital multimedia broadcast (CMMB) baseband processing module which is connected with the TD-SCDMA baseband processing module through an interface converting circuit. The CMMB baseband processing module is connected with a CMMB receiving antenna through a CMMB radio receiving module; and the TD-SCDMA baseband processing module is provided with a peripheral equipment interface connected with peripheral equipment. The utility model integrates the function of CMMB in a TD-SCDMA data card, so a user can watch television programs through the CMMB without influencing work or going online while going online with high speed through the TD-SCDMA using a computer, thereby the computer has multiple functions, and the user can conveniently and flexibly watch the television programs. In addition, the wireless data card can be conveniently connected with a flat television, a projector, and the like through the computer so as to obtain better visual effect.

Description

A kind of wireless data card

Technical field

The utility model relates to a kind of wireless data card, specifically, is a kind of wireless data card that has TD-SCDMA-SCDMA and CMMB function simultaneously

Background technology

TD-SCDMA is the abbreviation of English Time Division-Synchronous Code Division MultipleAccess (CDMA (Code Division Multiple Access) that the time-division is synchronous), it is third generation radio communication (3G) standard that China proposes with independent intellectual property right, working frequency range 2010～2025MHz, maximum transmission power 24dBm, sensitivity requires to be higher than-108dBm.The TD-SCDMA-SDCMA data card can be realized the most function of mobile phone at present, can carry out multiple 3G business, as functions such as video telephone and high speed Internet accesses, the maximum downstream transmission rate can reach 384Kbps, maximum uplink speed reaches 128Kbps, EDGE (Enhanced Data rates for GSM Evolution with 70-90Kbps, the enhanced data rates that GSM uses) average traffic speed is compared, the speed of download of TD-SCDMA data card is that they are more than 4 times, the USB2.0 interface of employing standard, plug and play, simple and convenient, can satisfy the instantaneously connecting internet of different occasions and use.

CMMB is the abbreviation of English China Mobile Multimedia Broadcasting (China Mobile's DMB), adopt the mobile TV acceptance criteria STiMi of China's independent research, this standard is applicable to that 30MHz is to the interior broadcasting service frequency of 3000MHz frequency range, launch the broadcast system of multi-media signals such as TV, broadcasting, data message via satellite with terrestrial wireless, can realize whole nation roaming.CMMB adopts two cover reception systems, supports that simultaneously ((2635～2660MHz), the U wave band receives the signal from the ground forwarding net to the U wave band, and the S-band reception is from the television broadcasting signal of satellite for 470MHz～798MHz) and S-band.

CMMB is the digital TV ground transmission standard that China broadcasting and TV system releases, and all Digital Terrestrial Mobile TV of China all can adopt this standard transmission from now on.Present TD-SCDMA can only realize surfing the Net and other correlation function of mobile phone, watches that the CMMB TV then needs special CMMB equipment to receive, and uses inconvenient.

The utility model content

The technical problems to be solved in the utility model provides a kind of wireless data card, when realizing TD-SCDMA data card function, can pass through CMMB module received television signal, realizes watching the function of CMMB TV programme on computers.

In order to address the above problem, the utility model provides a kind of wireless data card, comprise synchronous code division multiple access TD-SCDMA dual-mode antenna, TD-SCDMA radio-frequency (RF) receiving and transmission module and the TD-SCDMA baseband processing module of time-division that connects in turn, also comprise the DMB CMMB of the China Mobile baseband processing module that links to each other with the TD-SCDMA baseband processing module by interface conversion circuit, be connected with the CMMB reception antenna by the CMMB Receiver Module on the CMMB baseband processing module; Described TD-SCDMA baseband processing module is provided with the external apparatus interface that links to each other with external equipment.

Further, described interface conversion circuit is a programmable logic device.

Further, described interface conversion circuit is made of a FPGA (Field Programmable Gate Array) part and a memory, described programmable logic device carries out data with memory with the serial memory interface of described CMMB baseband processing module or signal is connected, and carries out chip selection signal with the general applications interface of described CMMB baseband processing module and is connected; Described programmable logic device and the TD-SCDMA baseband processing module universal asynchronous serial interface by separately carries out data or signal is connected.

Further, be connected with power management module on the described TD-SCDMA baseband processing module.

Further, described CMMB baseband processing module, CMMB Receiver Module, TD-SCDMA radio-frequency (RF) receiving and transmission module and CMMB reception antenna and TD-SCDMA dual-mode antenna are arranged on the front of printed circuit board (PCB); Described TD-SCDMA baseband processing module, power management module and interface conversion circuit are arranged on the back side of described printed circuit board (PCB).

Further, described external apparatus interface is a card bus interface, and described card bus interface is connected with the card bus of external equipment.

The utility model is integrated CMMB function in the TD-SCDMA data card, make when active computer passes through the TD-SCDMA high speed Internet access, can also not influence work and online by the CMMB TV reception, thereby realize a tractor serves several purposes, convenient, flexible TV reception.In addition, can be connected with equipment such as panel TV, projecting apparatus easily, thereby obtain better visual effect by computer.

Description of drawings

Fig. 1 is the structure principle chart of wireless data card of the present utility model;

Fig. 2 is the data path schematic diagram of wireless data card of the present utility model;

Fig. 3 is that the circuit face module of wireless data card one embodiment of the present utility model is placed schematic diagram;

Fig. 4 is that the circuit back side module of wireless data card one embodiment of the present utility model is placed schematic diagram.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to qualification of the present utility model.

As shown in Figure 1, data card of the present invention combines the TD-SCDMA communication module with the CMMB module, hardware has comprised TD-SCDMA baseband processing module, CMMB baseband processing module, TD-SCDMA radio-frequency (RF) receiving and transmission module, CMMB Receiver Module, power management module, interface conversion circuit and TD-SCDMA dual-mode antenna and CMMB reception antenna, wherein the TD-SCDMA baseband processing module is provided with the external apparatus interface (CARD BUS interface among Fig. 1) that links to each other with external equipment, and the TD-SCDMA baseband processing module is connected by interface conversion circuit with the CMMB baseband processing module; The TD-SCDMA baseband processing module is connected with the TD-SCDMA dual-mode antenna by the TD-SCDMA radio-frequency (RF) receiving and transmission module; The CMMB baseband processing module is connected with the CMMB reception antenna by the CMMB Receiver Module.

Wherein, interface conversion circuit is the circuit that a programmable logic device and memory constitute, programmable logic device carries out data/signal with memory with the serial memory interface of CMMB baseband processing module and is connected, and carries out chip selection signal with the general applications interface of CMMB baseband processing module and is connected; Programmable logic device and the TD-SCDMA baseband processing module universal asynchronous serial interface by separately carries out data/signal and is connected.In the embodiment shown in fig. 1, what programmable logic device adopted is CPLD (ComplexProgrammable Logic Device, CPLD), and what memory adopted is EEPROM (electricallyerasable ROM (EEROM)).Interface conversion circuit also can be made of separately a programmable logic device.

Data path schematic diagram as shown in Figure 2.Because TD-SCDMA is different with the CMMB frequency range, TD-SCDMA radio frequency processing module and CMMB radio frequency processing module are separate, respectively to handling from the radiofrequency signal of antenna port reception separately, carry out converting digital IQ signal to corresponding TD-SCDMA baseband processing module and CMMB baseband processing module after down-conversion, ADC (Analog-to-DigitalConverter, the analog to digital converter) conversion; The TD-SCDMA emission is IQ signal process DAC (the Digital-to-Analog Converter by the output of TD-SCDMA baseband processing module, digital to analog converter) after the conversion, simulates and launch by the TD-SCDMA dual-mode antenna after up-conversion is given the TD-SCDMA radio-frequency (RF) receiving and transmission module.

Wireless data card of the present utility model can adopt the method for two-sided layout.As shown in Figure 3 and Figure 4, module is placed the two sides of PCB (Printed Circuit Board, printed circuit board (PCB)) respectively.The data card front is furnished with CMMB baseband processing module, CMMB Receiver Module, TD-SCDMA radio-frequency (RF) receiving and transmission module and CMMB reception antenna and TD-SCDMA dual-mode antenna; The back side is furnished with TD-SCDMA baseband processing module, power management module and interface conversion circuit.CMMB antenna and TD antenna avoid TD when emission CMMB to be produced interference as far as possible from far away.Data card can be USB (Universal Serial Bus, universal serial bus structural) interface also can be PCMCIA (PCMCIA (personal computer memory card international association)) interface, with PC ((Personal Computer, personal computer) after machine links to each other, provide the mode of virtual bus that data are sticked into capable identification and management by PC side drive software, and drive to drive by the TD-SCDMA that makes up on it data are sticked into capable operations with CMMB, data card links to each other with Card Bus (card bus) bus by PC is inner, TD-SCDMA and CMMB data are inserted, and data are by Card Bus interface, pass through baseband processing module respectively, the radio frequency processing module is transmitted between user and network.

When watching the CMMB TV programme, data card can be inserted computer, then installation data card drive software and CMMB player software by computer.Begin television channel searching by PC rear flank platform CMMB software then, enter player interface behind the channel that the user selects to like and play TV programme, panel TV or projector can also be connected with computer, watch with TV or projection, visual effect can be better.

Like this, trapezoidal TD-SCDMA and two systems of CMMB of on data card, having realized of this practicality, just can carry out the TD-SCDMA high speed Internet access whenever and wherever possible as long as have notebook computer or PC computer by the data card that has the CMMB function, simultaneously can also watch CMMB mobile broadcast television program, TV reception does not influence normal work and surfs the web.

The above embodiment is the preferred embodiment that proves absolutely that the utility model is lifted, and protection range of the present utility model is not limited thereto.Being equal to that those skilled in the art are done on the utility model basis substitutes or conversion, all within protection range of the present utility model.Protection range of the present utility model is as the criterion with claims.

Claims

1, a kind of wireless data card, it is characterized in that, comprise synchronous code division multiple access TD-SCDMA dual-mode antenna, TD-SCDMA radio-frequency (RF) receiving and transmission module and the TD-SCDMA baseband processing module of time-division that connects in turn, also comprise the DMB CMMB of the China Mobile baseband processing module that links to each other with the TD-SCDMA baseband processing module by interface conversion circuit, be connected with the CMMB reception antenna by the CMMB Receiver Module on the CMMB baseband processing module; Described TD-SCDMA baseband processing module is provided with the external apparatus interface that links to each other with external equipment.

2, wireless data card as claimed in claim 1 is characterized in that, described interface conversion circuit is a programmable logic device.

3, wireless data card as claimed in claim 1, it is characterized in that, described interface conversion circuit is made of a FPGA (Field Programmable Gate Array) part and a memory, described programmable logic device carries out data with memory with the serial memory interface of described CMMB baseband processing module or signal is connected, and carries out chip selection signal with the general applications interface of described CMMB baseband processing module and is connected; Described programmable logic device and the TD-SCDMA baseband processing module universal asynchronous serial interface by separately carries out data or signal is connected.

4, wireless data card as claimed in claim 1 is characterized in that, is connected with power management module on the described TD-SCDMA baseband processing module.

5, wireless data card as claimed in claim 4, it is characterized in that described CMMB baseband processing module, CMMB Receiver Module, TD-SCDMA radio-frequency (RF) receiving and transmission module and CMMB reception antenna and TD-SCDMA dual-mode antenna are arranged on the front of printed circuit board (PCB); Described TD-SCDMA baseband processing module, power management module and interface conversion circuit are arranged on the back side of described printed circuit board (PCB).

6, wireless data card as claimed in claim 1 is characterized in that, described external apparatus interface is a card bus interface, and described card bus interface is connected with the card bus of external equipment.