CN1758556A - Multi-mode terminal of global mobile communication system wide-band CDMA - Google Patents
Multi-mode terminal of global mobile communication system wide-band CDMA Download PDFInfo
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- CN1758556A CN1758556A CNA2005101149387A CN200510114938A CN1758556A CN 1758556 A CN1758556 A CN 1758556A CN A2005101149387 A CNA2005101149387 A CN A2005101149387A CN 200510114938 A CN200510114938 A CN 200510114938A CN 1758556 A CN1758556 A CN 1758556A
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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
The present invention relates to a kind of multimode terminal, particularly a kind of multimode terminal that works in the GSM/WCDMA pattern.
Background technology
Global system for mobile communications (hereinafter being called GSM) is a kind of international standard of the cellular services that uses in some place in the world.For example: be operated in 900MHz frequency range (890MHz-960MHz) in Europe and Asia GSM, be operated in 1900MHz frequency range (being sometimes referred to as 1.9GHz) in the U.S..Along with the demand of the present and the future to the mobile phone multimedia performance, the transmission of access of data and video and speech in the communication service, it is not enough that the present transmittability of mobile network becomes soon.
Universal Mobile Telecommunications System (hereinafter being called UMTS) is a kind of global radio multimedia system, radio communication with very fast transfer of data is provided and provides function more flexibly with the form of novel business to the user.The basic demand of UMTS network comprises more high transfer rate, user's access number and the bigger capacity in the current system, the quality of service that also requires in the present mobile communications network to strengthen more, wideer overlay area and a large amount of supplementary services.
Wideband CDMA (WCDMA) is the third generation (3G) mobile wireless technology, compares with narrowband CDMA, and it provides higher data rate to moving with portable radio machine.WCDMA can support mobile/handheld speech, image, data and the video communication up to 2Mbps (local access) or 384Kbps (wide area access).Input signal is digitized.Be sent out through wide frequency range 25 with coding, spread spectrum mode.Compare with the carrier wave that the 200KHz that is used for narrowband CDMA is wide, WCDMA uses the wide carrier wave of 5MHz.
Universal mobile telecommunications service (UMTS) is another kind of 3G network, can be used to send speech, multimedia or the out of Memory of number format.As the simplest configuration of data transmission channel, UMTS is a phone or portable computer, and it is almost worked in each corner in the world and be provided to constant 30 of internet and inserts at a high speed.UMTS can send high-quality video image.The UMTS system is based on gsm system, and works on the frequency of about 2GHz, and this frequency is higher than the frequency of present DCS-1800 net (1800MHz Digital Cellular System).
GSM is used for Europe and Asia at most, and CDMA is used for the U.S., China, Korea S, India and Taiwan more.Under the environment of world market speech and data communication enhancing and expansion, there is strong demand in international traveler to " universal telephone " that can both use in many countries.For example, work in multimodal phone such as 5GSM and/or WCDMA.
Summary of the invention
The object of the present invention is to provide a kind of multimode terminal of global mobile communication system/wide-band CDMA, can realize on the terminal support various modes.
Technical scheme of the present invention comprises:
A kind of multimode terminal of global mobile communication system/wide-band CDMA comprises:
One switches parts, is used in the global system for mobile communications pattern analog signal that receives being switched to the delta sigma modulator, and in the Wideband Code Division Multiple Access (WCDMA) pattern analog signal that receives is switched to mould one number converter;
Convolution module, be used in the global system for mobile communications pattern, with the output multiplication of filter coefficient and described delta sigma modulator producing the global system for mobile communications mode waveform, and in the Wideband Code Division Multiple Access (WCDMA) pattern with the output multiplication of PN sign indicating number and mould one number converter with generation Wideband Code Division Multiple Access (WCDMA) pattern output waveform; And
Output block, be used in the global system for mobile communications pattern, the described global system for mobile communications mode waveform of output is to recover global system for mobile communications pattern output waveform after predetermined delay, and in the Wideband Code Division Multiple Access (WCDMA) pattern, the described Wideband Code Division Multiple Access (WCDMA) pattern output waveform of no predetermined delay ground output.
Described multimode terminal, wherein, each described convolution module comprises:
Memory is used to store described filter coefficient;
The 3rd switch is used for receiving the output of described filter coefficient and mould one number converter selectively according to described global system for mobile communications pattern or Wideband Code Division Multiple Access (WCDMA) pattern;
The PN code generator is used for producing the PN sign indicating number in the Wideband Code Division Multiple Access (WCDMA) pattern;
The 4th switch is used for according to global system for mobile communications pattern or Wideband Code Division Multiple Access (WCDMA) pattern, receives the output and the PN sign indicating number of described delta sigma modulator selectively;
Multiplier is used at the output multiplication of global system for mobile communications pattern with described filter coefficient and delta sigma modulator, and in the Wideband Code Division Multiple Access (WCDMA) pattern output and the PN sign indicating number of described mould one number converter is multiplied each other; And
Accumulator, the output of the described multiplier that is used to add up is to produce output waveform.
Described multimode terminal, wherein, described filter coefficient is the coefficient of global system for mobile communications pattern low pass filter.
Described multimode terminal, wherein, described memory is ROM.
Described multimode terminal, wherein, the output of described delta sigma modulator is 1 bit, and the output of described PN code generator is 8 bits, and described filter coefficient is 11 bits, and 11 is multiples of 2.
The multimode terminal of a kind of global mobile communication system/wide-band CDMA provided by the present invention has been realized a kind of double module terminal device.
Description of drawings
Fig. 1 is the block diagram of multi-mode communication system of an embodiment of terminal of the present invention; And
Fig. 2 is the detailed diagram of the sequential volume product unit in the multi-mode communication system that is included in Fig. 1 of terminal of the present invention.
Embodiment
Below in conjunction with accompanying drawing, will carry out comparatively detailed explanation to each preferred embodiment of the present invention.
The multimode terminal of global mobile communication system/wide-band CDMA of the present invention, multi-mode communication system according to the present invention is described as depicted in figs. 1 and 2, Fig. 1 is the block diagram of multi-mode communication system 100 according to an embodiment of the invention, it comprises delta sigma modulator 102,8 bit moulds, one number converters (ADC) 104, sequential volume product unit 106,108 and 110, mode selecting unit 112, first and second switch elements 120 and 1300 are when working in the GSM pattern, it is 1 bit digital signal that 4-E modulator 102 will be imported analog signal conversion, with for the phase produces 1 bit symbol weekly.104 pairs of analog signals of 8 bit moulds, one number converter are sampled, and with 30 the sampling after analog signal conversion be 8 bit digital signal.First switch unit 120 will import selectively that analog signal is connected to delta sigma modulator 102 or 8 bit moulds, one number converter, 1,040 second switch units 130 are connected to sequential volume product unit 106 with the output of delta sigma modulator 102 or the output of 8 bit moulds, one number converter 104 selectively, 108 and 1100 sequential volume product units 106,108 and 110 by the output of second switch unit, 130 reception delta sigma modulators 102 or the output of 8 bit moulds, one number converter 104, and, will export with filter coefficient C1 to Cn or pseudo noise (PN) sign indicating number and multiply each other according to whether working in GSM pattern or WCDMA pattern.
Be the detailed diagram of sequential volume product unit 106,108 or 110 as shown in Figure 2.Fig. 2 explains illustrational purpose with reference to the first sequential volume product unit 106.The first sequential volume product unit 106 comprises third and fourth switch unit 201 and 203, ROM202, PN code generator 204, multiplier 206 and accumulator 208.The ROM202 memory filter, coefficient C1 to Cn.According to GSM pattern or WCDMA pattern, the 3rd switch unit 201 is sent to the filter coefficient that multiplier 206.C1 to Cn is a GSM pattern low pass filter with the output of filter coefficient C1 to Cn and 8 bit moulds, one number converter (104 among Fig. 1) selectively, and 1 bit output multiplication of filter coefficient and delta sigma modulator (102 among Fig. 1) is with regeneration (or recovery) output signal.
When being used for WCDMA, dividing multipling channel by PN sign indicating number identification code, and send by identical frequency band.According to GSM pattern or WCDMA pattern, the 4th switch unit 203 is sent to multiplier 206 with the 1 bit output of delta sigma modulator (102 among Fig. 1) and the bit output of PN code generator 204 selectively.The 1 bit output of PN code generator 204 and the output multiplication of 8 bit moulds, one number converter (104 among Fig. 1) are to recover output waveform.The add up operation result of multiplier 206 of accumulator 208, thus GSM pattern or WCDMA pattern output waveform generated.
In the multimode terminal of the present invention, sequential volume product unit 106,108 and 110 output are connected to selected cell 112.When working in WCDMA pattern (example: in the time of the WCDMA pattern), are data of PN sign indicating number # 1 channel from the output of sequential volume product unit 106.Output from sequential volume product unit 108 is the data of PN sign indicating number #2 channel.These channels are code division multiplexings.
In the situation of the multipath transmisstion of WCDMA of the present invention, the signal in different paths identified by the difference of PN sign indicating number in fixed 25 o'clock.Come restoring signal by different sequential volume product unit 106 and 108 independently.106 and 108 output is merged to form the Rake receiver.In this case, PN sign indicating number # 1 is identical sign indicating number sequence with #2, but they are different in timing.When working in the GSM pattern, selected cell 112 is in interlude interval (extraction) output convolution results, thus recovery GSM output waveform.Those skilled in the art will know that timing, delay and the wave character of GSM and WCDMA, just no longer explain here.30 therefore, and multi-mode communication system of the present invention can be operated according to GSM pattern or WCDMA pattern.Because integrated different communication protocol or system'ss (example: GSM pattern or WCDMA pattern) in single structure, hardware configuration is simplified.In addition, can in GSM pattern and WCDMA pattern, share multiplier such as the common hardware configuration of sequential volume product unit.
Should be understood that above-mentioned description at preferred embodiment of the present invention is comparatively detailed, can not think the restriction to scope of patent protection of the present invention thus, scope of patent protection of the present invention should be as the criterion with claims.
Claims (5)
1. the multimode terminal of a global mobile communication system/wide-band CDMA comprises:
One switches parts, is used in the global system for mobile communications pattern analog signal that receives being switched to the delta sigma modulator, and in the Wideband Code Division Multiple Access (WCDMA) pattern analog signal that receives is switched to mould one number converter;
Convolution module, be used in the global system for mobile communications pattern, with the output multiplication of filter coefficient and described delta sigma modulator producing the global system for mobile communications mode waveform, and in the Wideband Code Division Multiple Access (WCDMA) pattern with the output multiplication of PN sign indicating number and mould one number converter with generation Wideband Code Division Multiple Access (WCDMA) pattern output waveform; And
Output block, be used in the global system for mobile communications pattern, the described global system for mobile communications mode waveform of output is to recover global system for mobile communications pattern output waveform after predetermined delay, and in the Wideband Code Division Multiple Access (WCDMA) pattern, the described Wideband Code Division Multiple Access (WCDMA) pattern output waveform of no predetermined delay ground output.
2. multimode terminal according to claim 1 is characterized in that, each described convolution module comprises:
Memory is used to store described filter coefficient;
The 3rd switch is used for receiving the output of described filter coefficient and mould one number converter selectively according to described global system for mobile communications pattern or Wideband Code Division Multiple Access (WCDMA) pattern;
The PN code generator is used for producing the PN sign indicating number in the Wideband Code Division Multiple Access (WCDMA) pattern;
The 4th switch is used for according to global system for mobile communications pattern or Wideband Code Division Multiple Access (WCDMA) pattern, receives the output and the PN sign indicating number of described delta sigma modulator selectively;
Multiplier is used at the output multiplication of global system for mobile communications pattern with described filter coefficient and delta sigma modulator, and in the Wideband Code Division Multiple Access (WCDMA) pattern output and the PN sign indicating number of described mould one number converter is multiplied each other; And
Accumulator, the output of the described multiplier that is used to add up is to produce output waveform.
3. multimode terminal as claimed in claim 1 is characterized in that, described filter coefficient is the coefficient of global system for mobile communications pattern low pass filter.
4. multimode terminal according to claim 2 is characterized in that described memory is ROM.
5. multimode terminal according to claim 1 is characterized in that, the output of described delta sigma modulator is 1 bit, and the output of described PN code generator is 8 bits, and described filter coefficient is 11 bits, and 11 is multiples of 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101149387A CN1758556A (en) | 2005-11-16 | 2005-11-16 | Multi-mode terminal of global mobile communication system wide-band CDMA |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005101149387A CN1758556A (en) | 2005-11-16 | 2005-11-16 | Multi-mode terminal of global mobile communication system wide-band CDMA |
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| CN1758556A true CN1758556A (en) | 2006-04-12 |
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| CNA2005101149387A Pending CN1758556A (en) | 2005-11-16 | 2005-11-16 | Multi-mode terminal of global mobile communication system wide-band CDMA |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010150099A2 (en) * | 2009-06-26 | 2010-12-29 | Slieve Mish Inventions Limited | Private cellular system with auto-registration functionality |
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2005
- 2005-11-16 CN CNA2005101149387A patent/CN1758556A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010150099A2 (en) * | 2009-06-26 | 2010-12-29 | Slieve Mish Inventions Limited | Private cellular system with auto-registration functionality |
| WO2010150099A3 (en) * | 2009-06-26 | 2011-04-14 | Slieve Mish Inventions Limited | Private cellular system with auto-registration functionality |
| CN104285499A (en) * | 2009-06-26 | 2015-01-14 | 宇宙桥有限公司 | Private cellular system with auto-registration functionality |
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