JP2007529181A - Multi-mode / multi-band mobile station and method of operating the mobile station - Google Patents

Abstract

  A multimode / multiband mobile station and a method of operating the mobile station are provided. A multimode / multiband mobile station transmits a multimode / multiband signal through each transmitter and signals corresponding to the same frequency band of the multimode / multiband are transmitted in the same frequency band. A reception unit that receives one or more wireless signals having different services through a dual-purpose receiver, and receives signals that do not fall within the same frequency band through different frequency band-specific receivers. The multi-mode / multi-band mobile station according to the present invention can reduce the number of receivers by using one dual-purpose receiver even if the service form is different for the same frequency band. The multimode / multiband mobile station can also use a conventional FDD (for example, WCDMA) duplexer for a TDD (for example, GSM850 or PCS1900).

Description

  The present invention relates to a wireless transmission / reception apparatus, and more particularly to a mobile station supporting multimode / multiband.

  Recently, various access standards used in wireless networks, such as GSM (Global System for Mobile Communication), CDMA (Code Division Multiple Access), WCDMA (Wideband CDMA), and IEEE (Institut Elect 80). .16 has been developed. However, the rapid increase in wireless access standards brings inconvenience to mobile phones (or terminals) such as mobile phones, PDA (Personal Data Assistant) equipment, and wireless laptop computers, and difficulty in manufacturing them. It became so. User expectations for current networks cannot be met by mobile stations that support only a few available standards.

  To address this, wireless mobile stations have moved to a SDR (Software-Defined Radio) structure, thereby providing a single hardware platform for multiple radio interface technologies. With the continuous development of semiconductor processing technology, mobile stations (or wireless terminals) are able to make high-rate signal processing functions into specific standards or special-purpose communication transmission / reception systems through software reconfiguration on a single hardware platform. Various wireless standards can be provided by a single system. Various forms of hardware that can be reconfigured in software are possible, for example, a fixed functional block having orderable parameters and flexible interconnection functions. The hardware that can be reconfigured by software can be realized by, for example, a field programmable gate array (FPGA).

  For the SDR design, factors such as board space, material cost, current consumption to protect the battery life, and low level component count should be considered. Note that the expectation to obtain roaming capability between various standards requires that the SDR receiver perform faster searches and handoffs. However, in general, more power is required for faster processing. In the development of wireless mobile stations up to now, various wireless standards were necessary to satisfy various hardware. In order to design a conventional receiver, a ZIF (Zero-Intermediate-Frequency) structure that uses an analog element to realize an endier receiver front end is used.

  In the conventional ZIF structure, a narrowband device is used in which the direct downconverter is not suitable for wideband applications. The other part of the receiver design is that it is digitized by IF (Intermediate Frequency).

  There is a need for a technology for mobile stations that is realized by optimizing hardware elements that can be reconfigured in software at the receiver front end. In particular, there is a need for a receiver that can use elements that can be reconfigured before being converted to a digital signal at the IF level.

  Usually, mobile communication services are provided in different communication service systems for each country (region) around the world, and several frequency bands are used for each communication service system. For example, the mobile communication service system is provided using a CDMA system, a GSM system, and a WCDMA system for each country (region). Here, the CDMA system uses 800 MHz, 1800 MHz, and 1900 MHz frequency bands, the GSM system uses 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz frequency bands, and the WCDMA system uses 850 MHz, 1900 MHz, and 2000 MHz, respectively.

  A conventional wireless mobile station is configured to use signals in one or two frequency bands corresponding to a desired communication service among the mobile communication services. As a result, each wireless mobile station can use only one or two mobile communication services among various mobile communication services in countries around the world. Therefore, there is an inconvenience that the user cannot use his / her mobile station when the user goes to another area where the communication service is different depending on travel or business trip.

  As a result, the user demands a mobile station capable of providing all mobile communication services around the world. Mobile station manufacturers are working to make all mobile communication services from around the world available on a single mobile station in response to such user requirements. In order to use all mobile communication services and all frequency bands for each service in the world, mobile stations that support multimode / multiband are required.

  Therefore, in order to solve the problems of the prior art as described above, an object of the present invention is to provide a multi-mode / multi-band mobile station that can reduce the overall power consumption of a SDR (Software-Defined Radio) processing element. It is to provide.

  The purpose of this is to obtain a lower intermediate frequency (IF) and receive a NZIF (Near-Zero Intermediate Frequency) radio (RF) reception that does not require a high processing speed of a digital intermediate frequency (DIF) receiver element. This can be realized using a front end configuration. The NZIF RF receiver can also provide a lower sampling rate at the IF and maintain digital signal processing functions at the IF level.

  This object is achieved by realizing a wideband IR mixer design in the RF analog front end of the receiver that can be satisfied in multiple frequency bands with low power consumption. This object is also realized by developing a technique for reducing the power consumption by operating the DIF part at a lower sampling rate and the possibility of configuring the digital IF filter.

  It is another object of the present invention to provide a multimode / multiband mobile station that can be used in a wireless network that operates based on various wireless interface standards.

  In addition, an object of the present invention is to provide a mobile station that supports multimode / multiband using different service / radio transceivers in the same frequency band when the services are different in the same frequency band. There is to do.

  Furthermore, an object of the present invention is to provide a mobile station that supports diversity while simultaneously supporting multimode / multiband by using different service-use radio transceivers in the same frequency band.

  In order to achieve the above object, the present invention provides a multimode / multiband mobile station for a wireless network operating based on various wireless interface standards, and a plurality of low noises each adapted to a selected frequency band. Receiving an amplified RF signal from an amplifier and one amplifier selected from the plurality of low noise amplifiers; downconverting the amplified RF signal to obtain a first analog intermediate frequency (IF) signal; And a NZIF (Near-Zero Intermediate Frequency) wideband image rejection (IR) mixer to be generated.

  The present invention also relates to a method for operating a multimode / multiband mobile station for a wireless network operating under various wireless interface standards, wherein one of a plurality of low noise amplifiers is selected and an incoming radio frequency is selected. Amplifying the (RF) signal and adapting each of the plurality of low noise amplifiers to a selected frequency band; and a NZIF broadband IR mixer downconverts the RF signal amplified by the selected low noise amplifier. Generating a first analog intermediate frequency (IF) signal.

  The present invention relates to a transmitter that transmits a multimode / multiband signal through each transmitter, and a signal corresponding to the same frequency band of the multimode / multiband has different services in the same frequency band. A reception unit that receives two or more wireless signals together and receives the signals that do not fall within the same frequency band through different frequency band receivers.

  Further, the present invention provides a switch unit for performing a switching operation for selecting a mode and a band to be received from among a multimode / multiband under predetermined control, and a multimode / multiband signal by the switching operation. A receiver for receiving a signal in its own mode and band, a mixer for down-converting the received signal using a local frequency corresponding to the mode and band to be received, and under predetermined control A baseband that controls operation of a receiver corresponding to a mode and a band to be received among the receivers, performs baseband processing on the down-converted received signal, and divides the baseband signal into modes and outputs the baseband signal. A processing unit and a control signal for receiving a signal of a mode and a band to be received, and outputting the local frequency Controlled by a local frequency corresponding to the mode and band attempts to the receive, characterized in that it comprises a modem for demodulating the mode-specific baseband signals through the respective mode-specific modem.

  The present invention reduces power consumption of a SDR (Software-Defined Radio) processing element in a multimode and multiband mobile station without requiring a high processing speed of a digital intermediate frequency (DIF) receiver element. This makes it possible to maintain the digital signal processing function at the IF level while lowering the sampling speed at the same time.

  In addition, the multimode / multiband mobile station of the present invention can consume a low current, and a wideband IR mixer can be designed at the RF analog front end of each receiver so as to satisfy multiple frequency bands. Also, a digital IF filter can be configured, and the digital IF portion can operate at a lower sampling rate, thereby reducing current consumption.

  The multi-mode / multi-band mobile station according to the present invention can reduce the number of receivers by using one dual-purpose receiver even if the service form is different for the same frequency band. The multimode / multiband mobile station can also use a conventional FDD (for example, WCDMA) duplexer for a TDD (for example, GSM850 or PCS1900).

  The multimode / multiband mobile station of the present invention can be realized with a small number of mixers by using each of the mixers of the receiver of the main reception band and the receiver of the sub reception band as one integrated mixer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the following drawings, the same constituent elements are denoted by the same reference numerals and reference numerals as much as possible. In addition, when it is judged that the concrete description regarding the well-known function or structure relevant to this invention makes the summary of this invention unknown, the detailed description is abbreviate | omitted.

  FIG. 1 shows a wireless communication system 100 in which a multimode / multiband mobile station (or wireless terminal) 111 can communicate with a base station operating under various wireless interface standards. In FIG. 1, it is assumed that a base station (BS) 101 is part of a first radio network operating based on a first radio interface standard (eg, CDMA2000). Also assume that base station 102 is part of a second wireless network that operates based on a second wireless interface standard (eg, GSM). A mobile station (MS) 111 can be configured with a first software load to communicate with the base station 101 and reconfigured with a second software load to communicate with the base station 102. The software load can be selected manually by user input or can be selected automatically upon detection of a signal from the base station 101 or base station 102.

  The invention is not limited to use with substantially mobile devices. Note that the present invention is also generally applied to other types of wireless terminals such as fixed wireless terminals. However, only the mobile station will be described below for simplicity and clarity. The term “Mobile Station” as used in the claims and the following description refers to a substantial mobile device (eg, a wireless telephone or a wireless laptop), or a stationary wireless terminal (eg, a device with wireless capabilities). (Monitor).

  FIG. 2 is a block diagram illustrating a multimode / multiband mobile station 111 according to the first embodiment of the present invention. The mobile station 111 includes an antenna array 201, a switchplexer 205, a reconfigurable reception path 210a, a reconfigurable reception path 210b, and a reconfigurable SDR (Software-Defined Radio) modem block 260. Including. The SDR modem block 260 is usually a multi-purpose device or a semi-order device, and its characteristics can be changed by a new software load. The mobile station 111 includes a transmission path 270 and a plurality of band pass filters 275, for example, band pass filters (BPF) 275a, 275b, 275c. The mobile station 111 includes a plurality of power amplifiers 280, for example, power amplifiers (PA) 280a, 280b, 280c.

  The present invention implements a more efficient search algorithm using the same dual receive path 210a and 210b, thereby enabling a roaming operation to be performed more easily. is there. Thus, the user can use the same mobile station even if the user moves in several other regions that support different wireless standards. The dual path structure allows remote reconfiguration of the intermediate frequency (IF) filter and digital intermediate frequency. Since the reconfigurable reception paths 210a and 210b are substantially the same, only the reconfigurable reception path 210a will be described in detail below. However, the following description regarding the reconfigurable reception path 210a applies to the reconfigurable reception path 210b with the same effect.

  The reconfigurable receive path 210a includes an input 212 consisting of a selectable low noise amplifier (LNA), a switch 215, a wideband image rejection (IR) mixer 216, and a voltage controlled oscillator (VCO). ) And a variable frequency oscillator block 218, a configurable blocking bandpass filter (BPF) 220, a programmable variable gain amplifier (VGA) 225, and a configurable anti-alias bandpass filter (BPF) 230. The reconfigurable receive path 210a includes a programmable analog / digital converter (ADC) 235, an IF mixer 240, a numerically controlled oscillator (NCO) 245, a digital channel filter block 250, a resampler (re-). a sampler) 252, a digital / analog converter (DAC) 255, and a configuration controller 229.

  The configuration controller 229 controls the configuration of the reception path 210a. Depending on the selected wireless interface, the configuration controller 229 transmits commands or configuration parameters to the reconfiguration block included in the receive path 210a to perform reconfiguration of these devices. For simplicity, connection lines between the configuration controller 229 and other elements of the reconfigurable receive path 210a are not shown.

  The input terminal 212 made up of a selectable LNA is composed of, for example, LNAs 212a, 212b, and 212c. An input 212 consisting of a selectable LNA receives an incoming RF signal from the switchplexer 205. Each of the LNAs 212a, 212b, 212c is optimized to amplify the RF signal within a selected frequency range. For example, the selectable LNA 212a amplifies the signal with the minimum power consumption in the range of 2.0 to 2.1 GHz, the other selectable LNA 212b amplifies the signal with the minimum power consumption in the range of 1800 to 1900 MHz, and the selectable LNA 212c has the range of 860 to 160 A signal can be amplified with minimum power consumption in the 960 MHz range. By using the LNA optimized for a specific frequency band, the multimode / multiband capability of the mobile station 111 is enhanced.

  The switch 215 selects only one input from the selectable LNA and applies it to the input terminal of the broadband IR mixer 216. To reduce power consumption, LNAs that are not selected by switch 215 can be turned off. The broadband IR mixer 216 receives the programmable reference signal from the VCO and variable frequency oscillator block 218 and down-converts the RF signal selected by the switch 215 to an IF level, eg, 10 MHz. The broadband IR mixer 216 performs NZIF down conversion. It is desirable that IR be performed only by a broadband IR mixer.

  Interferer is removed by filtering the IF signal from wideband IR mixer 216 using configurable blocking BPF 220. After further filtering by configurable anti-aliased BPF 230, programmable VGA 225 adjusts the IF signal level to an optimized predetermined level for ADC 235. In an embodiment of the invention, ADC 235 samples the IF signal at 40 Msps per second.

  Digital IF samples generated by the ADC 235 are down converted to the baseband by the IF mixer 240 and the NCO 245. Baseband in-phase I and quadrature Q signals from IF mixer 240 are filtered by digital channel filter block 250. The filtered baseband I and Q signals are resampled by the resampler 252 and matched to the speed of the SDR modem block 260. When the SDR modem block receives an analog input, the DAC 255 converts the digital I and Q signals into analog signals.

  NZIF down conversion enables low sampling rate DIF (Digital Intermediate Frequency) design for current conversion. The broadband IR mixer 216, as a highly linear mixer, corresponds to an important block in RF design. With such a new structure, a DSP (Digital Signal Processing) function, that is, an RSSI (Received Signal Strength Indicator) measurement for a search function can be performed through a receiver, and current consumption can be optimized.

  FIG. 3 is a flowchart 300 illustrating a search mode operation performed by the multimode / multiband mobile station 111 according to the first embodiment of the present invention. Here, it is assumed that the reception path 210b receives a signal according to the first wireless interface standard. Then, it is assumed that the reception path 210a searches for the signal of the second radio interface standard based on the set search algorithm. The switch plexer 205 selects any one of the LNAs 212a to 212c, and this input terminal belongs to a frequency band matched with the second radio interface standard (step 305). Switch 215 connects the output of the selected LNA to the input of broadband IR mixer 216 (step 310). The VCO and frequency modulation oscillator block 218 oscillates the frequency corresponding to the frequency band channel matched with the search algorithm, and the IR mixer 216 down-converts the LNA output through the frequency band channel matched with the search algorithm ( Step 315). Blocking BPF 220 is configured to filter the downconverted signal using a predetermined channel bandwidth (step 320).

  The digital IF section (i.e., IF mixer 240, NCO 245, filter block 250, resampler 252 and DAC 255) has each mode (e.g., GSM, GPRS (General Packet Radio System), EDGE (Enhanced Data rate for GSM Evolution), CDM). , WCDMA, 802.11)) (step 325). The received signal strength (RSS) can be measured by installing RSSI at the output end of the digital channel filter block 250 (step 330). If the signal strength at the output of the digital channel filter block 250 exceeds the strength of the signal received in the reception path 210b, the VCO and variable frequency oscillator block 218 is locked to the selected channel (step 335). . The modem 260 performs mode identification and reconfigures the anti-aliased BPF 230.

  In the multimode / multiband mobile station according to the first embodiment of the present invention, each of the reception path 210b for receiving the first radio interface standard signal and the reception path 210a for receiving the second radio interface standard signal. Have a low noise amplifier (LNA) for each band. Then, the multimode / multiband mobile station performs communication by selecting one input of each band-specific LNA included in the dual reception path.

  Therefore, based on the configuration according to the first embodiment of the present invention, it is possible to provide a multimode / multiband mobile station (or terminal) that can be used in a wireless network operating under various wireless interface standards.

  The multi-mode / multi-band mobile station according to the second embodiment of the present invention performs communication by selecting one input of the LNA for each band, but is also used for a common frequency band for each radio interface standard. Configured to use LNA.

  The multimode / multiband mobile station according to the second embodiment of the present invention will be described in detail below. FIG. 4 is a block diagram illustrating a multimode / multiband mobile station according to the second embodiment of the present invention. In FIG. 4, the first radio interface standard, that is, WCDMA2000 MHz, WCDMA1900 MHz, WCDMA850 MHz band corresponding to WCDMA service, and the second radio interface standard, that is, GSM850 MHz, GSM900 MHz, DCS (Digital Cellular System) 1800 MHz corresponding to GSM service, 1 shows an example of a mobile station supporting a PCS (Personal Communication System) 1900 MHz band.

  Referring to FIG. 4, the multimode / multiband mobile station according to the second embodiment of the present invention includes a transmission unit 410, a reception unit 420, a duplex unit 430, a switch and power amplifier module (Power Amplifier Module) 440. And a first antenna switch 450 and a second antenna switch 460.

  The transmission unit 410 includes a transmitter for each service and frequency band, and transmits a signal corresponding to the communication service and the frequency band through each transmitter. The transmission unit 410 includes, for example, a WCDMA2000 transmitter 411, a WCDMA1900 transmitter 412, a WCDMA850 transmitter 413, and a TDD (Timed Time) for transmitting a radio signal based on the first radio interface standard of FDD (Frequency Division Duplex) method. A DCS1800 / PCS1900 transmitter 414 and a GSM850 / GSM900 transmitter 415 for transmitting a radio signal based on the second radio interface standard of the Division Duplex) system can be configured. Transmitter 410 transmits a signal in the WCDMA2000 MHz band through WCDMA2000 transmitter 411, transmits a signal in the WCDMA1900 MHz band through WCDMA1900 transmitter 412, and transmits a signal in the WCDMA850 MHz band through WCDMA850 transmitter 413. The transmission unit 410 transmits a DCS1800 MHz or PCS1900 MHz band signal through the DCS1800 / PCS1900 transmitter 414 and transmits a GSM850 MHz or GSM900 MHz band signal through the GSM850 / GSM900 transmitter 415.

  The receiving unit 420 includes a receiver for each service and frequency band to support multimode / multiband, and particularly includes a dual-purpose receiver having a dual-purpose LNA that can be used even if services of the same frequency band are different. . In addition, the receiving unit 420 includes a diversity receiver 470 for supporting WCDMA diversity.

  The receiving unit 420 includes, for example, a WCDMA2000 receiver 421, a WCDMA / PCS1900 combined receiver 422, a WCDMA / GSM850 combined receiver 423, a DCS1800 receiver 424, a GSM900 receiver 425, a WCDMA2000 diversity receiver 426, A WCDMA 1900 diversity receiver 427 and a WCDMA 850 diversity receiver 428 are included.

  The WCDMA / PCS 1900 combined receiver 422 and the WCDMA / GSM 850 combined receiver 423 are dual-purpose receivers that can receive different service signals in the same frequency band. A CDMA2000 diversity receiver 426, a WCDMA1900 diversity receiver 427, and a WCDMA850 diversity receiver 428 are diversity receivers for supporting WCDMA diversity.

  The receiving unit 420 receives one service and frequency band, that is, a signal in the WCDMA2000 MHz band, a signal in the DCS1800 MHz band, and a signal in the GSM900 MHz band through each of the WCDMA2000 receiver 421, the DCS1800 receiver 424, and the GSM900 receiver 425. The receiving unit 420 receives different service signals in the same frequency band through dual-purpose receivers such as the WCDMA / PCS1900 combined receiver 422 and the WCDMA / GSM850 combined receiver 423. That is, the receiving unit 420 receives a WCDMA 1900 MHz band signal or a PCS 1900 MHz band signal through the WCDMA / PCS 1900 combined receiver 422, and receives a WCDMA 850 MHz band signal or a GSM 850 MHz band signal through the WCDMA / GSM 850 combined receiver 423. The receiving unit 420 receives a diversity signal in the WCDMA 200 MHz band through the WCDMA2000 diversity receiver 426, receives a diversity signal in the WCDMA1900 MHz band through the WCDMA1900 diversity receiver 427, and receives a diversity signal in the WCDMA850 MHz band through the WCDMA850 diversity receiver 428. To do.

  The duplex unit 430 is connected to the WCDMA2000 transmitter 411, the WCDMA1900 transmitter 412, and the WCDMA850 transmitter 413 that use the FDD scheme among the transmitters of the transmission unit (410), and the FDD scheme among the receivers of the reception unit 420. Are connected to a WCDMA2000 receiver 421 using WFD, a WCDMA / PCS1900 combined receiver 422 and a WCDMA / GSM850 combined receiver 423 using both the FDD scheme and the TDD scheme. Such a duplex unit 430 includes transmission signals output from the transmitters 411, 412 and 413, reception signals corresponding to the WCDMA2000 receiver 421, the WCDMA / PCS1900 combined receiver 422, and the WCDMA / GSM850 combined receiver 423, Isolate. In the prior art, the duplex unit 430 was used to separate a transmission signal from only a WCDMA signal based on an FDD scheme, for example, a scheme using different frequency bands for upstream and downstream from a received signal. . However, in this embodiment, since the FDD system signal (WCDMA signal) and the TDD system signal (GSM850 or PCS1900 system) are received by the dual-purpose receiver, the duplex unit 430 receives not only the FDD system but also the TDD system. Also serves as a part filter.

  The switch and power amplifier 440 is connected to the DCS1800 / PCS1900 transmitter 414 and the GSM850 / GSM900 transmitter 415 in the transmitter of the transmitter 410, and the DCS1800 receiver 424 and the GSM900 signal in the receiver of the receiver 420. Connected to the device 425. The switch and power amplification unit 440 separates a transmission signal output from the DCS1800 / PCS1900 transmitter 414 or the GSM850 / GSM900 transmitter 415 and a reception signal corresponding to the DCS1800 receiver 424 or the GSM900 receiver 425. The switch and power amplification unit 440 selects a frequency band to be transmitted from the DCS1800 MHz band and the PCS1900 MHz band supported by the DCS1800 / PCS1900 transmitter 414, and selects the GSM850 MHz band and the GSM900 MHz band supported by the GSM850 / GSM900 transmitter 415. Select the frequency band to be transmitted. In addition, the switch and power amplification unit 440 amplifies the power (power) of the DCS1800 MHz band and the PCS1900 MHz band transmission signals output from the DCS1800 / PCS1900 transmitter 414, and the GSM850 MHz band output from the GSM850 / GSM900 transmitter 415. Amplifies the power of the transmission signal in the GSM 900 MHz band.

  The first antenna switch 450 is connected to the duplex unit 430 and the switch and power amplification unit 440, performs switching between the antenna and the duplex unit 430, and performs switching between the antenna and the switch and power amplification unit 440. Carry out.

  The second antenna switch 460 is connected to each of the diversity receivers 426, 427, and 428, and performs switching between the antenna and the diversity receivers 426, 427, and 428.

  According to the second embodiment of the present invention, the multi-mode / multi-band mobile station configured as described above uses one dual-purpose receiver for the same frequency band even in different service modes, that is, modes. In addition, the duplexer used only for the conventional FDD system (for example, WCDMA system) can also be used for the TDD system (for example, GSM850 or PCS1900 system), thereby enabling the conventional multimode / multiband mobile station to be used. The number of receivers can be reduced.

  On the other hand, the multimode / multiband mobile station according to the embodiment of the present invention is configured to support all mobile communication services and frequency bands used all over the world, and is used in a specific region (country). It can be configured to support communication services and frequency bands.

  FIG. 5 is a table showing services and frequency bands supported by a multimode / multiband mobile station according to an embodiment of the present invention. Referring to FIG. 5, the global type illustrates a case where a multimode / multiband mobile station according to an embodiment of the present invention supports all mobile communication services and frequency bands used worldwide. The European type indicates a case where a multimode / multiband mobile station according to an embodiment of the present invention supports a mobile communication service and a frequency band corresponding to the European region. The US type indicates a case where a multimode / multiband mobile station according to an embodiment of the present invention supports a mobile communication service and a frequency band corresponding to the US region.

  A case where a multimode / multiband mobile station is realized as a world type according to the second embodiment of the present invention will be described. When a multimode / multiband mobile station is realized as a world type, the WCDMA2000 MHz, WCDMA1900 MHz, WCDMA850 MHz, GSM / GPRS / EDGE1900 MHz, and GSM / GPRS / EDGE850 MHz bands that are most commonly used in the world use the main receiver. To do. The GSM / GPRS / EDGE 1800 MHz band, the GSM / GPRS / EDGE 900 MHz band, and the diversity band use sub-receivers.

  FIG. 6 shows a case where the multimode / multiband mobile station according to the second embodiment of the present invention is realized in the world type. FIG. 6 is a specific circuit diagram of a world-type multimode / multiband mobile station according to the second embodiment of the present invention.

  Referring to FIG. 6, a transmission unit 610 transmits a radio signal based on the TDD scheme with a WCDMA2000 transmitter 611, a WCDMA1900 transmitter 612, and a WCDMA850 transmitter 613 for transmitting a radio signal based on the FDD scheme. DCS1800 / PCS1900 transmitter 614 and GSM850 / GSM900 transmitter 615. Each of the transmitters 611 to 615 includes five amplifiers (Pre-Power Amplifiers: PPA) for amplifying the power of the transmission signal.

  The receiving unit 620 has WCDMA 2000 MHz, WCDMA 1900 MHz, WCDMA 850 MHz, GSM / GPRS / EDGE (PCS) 1900 MHz, GSM / GPRS / EDGE (GSM) 850 MHz, GSM / GPRS / EDGE 1800 MHz, GSM / GPRS / EDGE 900 MHz bands used worldwide. Including a receiver. The receiving unit 620 includes individual receivers for receiving signals for each mode and frequency band as described above, but the WCDMA 1900 MHz band and the GSM / GPRS / EDGE 1900 MHz are the same frequency band even if the services are different. For the PCS 1900 MHz band corresponding to the band, the WCDMA 850 MHz band, and the GSM 850 MHz band corresponding to the GSM / GPRS / EDGE 850 MHz band, a dual-purpose receiver is used. Reception unit 620 includes a diversity receiver for supporting diversity in WCDMA2000 MHz, WCDMA1900 MHz, and WCDMA850 MHz bands.

  Therefore, the receiving unit 620 includes a WCDMA2000 receiver 621, a WCDMA / PCS1900 combined receiver 622, a WCDMA / GSM850 combined receiver 623, a DCS1800 receiver 624, a GSM900 receiver 625, a WCDMA2000 diversity receiver 626, A WCDMA 1900 diversity receiver 627 and a WCDMA 850 diversity receiver 628 are configured.

  The WCDMA2000 receiver 621 includes a first LNA 21 that amplifies a low signal received through the main antenna based on the WCDMA2000 service.

  The WCDMA / PCS1900 combined receiver 622 includes a second LNA 22 that amplifies a low signal received through the main antenna based on the WCDMA1900 service scheme or the GSM / GPRS / EDGE1900 service scheme, that is, the PCS1900 service scheme. The WCDMA / GSM850 combined receiver 623 includes a third LNA 23 that amplifies a low signal received through the main antenna based on the WCDMA850 service method or the GSM / GPRS / EDGE850 service method, that is, the GSM850 service method. The DCS 1800 receiver 624 passes the DCS 1800 MHz band received signal received through the main antenna and does not pass the leak signal due to the transmission signal, and the received DCS 1800 MHz band received signal is amplified. 4 LNAs 24.

  The GSM 900 receiver 625 passes the GSM 900 MHz band received signal received through the main antenna and does not pass the leakage signal due to the transmission signal, and the fifth LNA 25 that amplifies the received GSM 900 MHz band received signal. including.

  Diversity receiver 670 includes a band-pass filter 16-18 that passes a signal in the diversity reception band received through the sub-antenna and does not pass a leakage signal due to the transmission signal, and LNAs 26-28 that amplify each diversity signal. Including.

  The duplex unit 630 includes a first duplexer 631 connected to the WCDMA2000 transmitter 611 and the WCDMA2000 receiver 621, a second duplexer 632 connected to the WCDMA1900 transmitter 612 and the WCDMA / PCS1900 combined receiver 622, and WCDMA850 transmission. And a third duplexer 633 connected to the WCDMA / GSM850 combined receiver 623. The first duplexer 631 outputs the WCDMA2000 MHz transmission signal output from the WCDMA2000 transmitter 611 to the main antenna, and outputs the WCDMA2000 MHz reception signal to the WCDMA2000 receiver 621. The second duplexer 632 outputs the WCDMA 1900 MHz transmission signal output from the WCDMA 1900 transmitter 612 to the main antenna, and outputs the WCDMA / PCS 1900 MHz reception signal to the WCDMA / PCS 1900 combined receiver 622. The third duplexer 633 outputs the WCDMA850 MHz transmission signal output from the WCDMA850 transmitter 613 to the main antenna, and outputs the WCDMA / GSM850 MHz reception signal to the WCDMA / GSM850 combined receiver 623.

  The switch and power amplifying unit 640 is connected to the DCS1800 / PCS1900 transmitter 614 and the GSM850 / GSM900 transmitter 615 in the transmitter of the transmitter 610, and the DCS1800 receiver 624 and the GSM900 receiver in the receiver of the receiver 620. Connected to the device 625. The switch and power amplification unit 640 includes a transmission / reception and band selection switch 641 for selecting transmission / reception of each transmission / reception signal and a band, and a first power amplifier 642 and a second power amplifier 643 for amplifying the power of each transmission signal. Including.

  The transmission / reception and band selection switch 641 selectively outputs the transmission signals in the DCS1800 / PCS1900 MHz band and the transmission signals in the GSM850 / GSM900 MHz band output from the DCS1800 / PCS1900 transmitter 614 and the GSM850 / GSM900 transmitter 615 to the main antenna. To perform switching. The transmission / reception and band selection switch 641 performs switching for outputting a DCS 1800 MHz band reception signal and a GSM 900 MHz band reception signal received through the main antenna to the corresponding DCS 1800 receiver 624 and GSM 900 receiver 625, respectively. The transmission / reception and band selection switch 641 selects a frequency band to be transmitted from the DCS1800 MHz band and the PCS1900 MHz band supported by the DCS1800 / PCS1900 transmitter 614, and selects the GSM850 MHz band and the GSM900 MHz band supported by the GSM850 / GSM900 transmitter 615. Of these, switching is performed to select a frequency band to be transmitted. The first power amplifier 642 amplifies the power of transmission signals in the DCS 1800 MHz band and the PCS 1900 MHz band output from the DCS 1800 / PCS 1900 transmitter 614. The second power amplifier 643 amplifies the power of the transmission signals in the GSM850 MHz band and the GSM900 MHz band output from the GSM850 / GSM900 transmitter 615.

  The first antenna switch 650 is connected to the duplex unit 630 and the switch and power amplification unit 640, performs switching between the main antenna and the duplex unit 630, and between the main antenna and the switch and power amplification unit 640. Perform switching.

  The second antenna switch 660 is connected to each of the diversity receivers 626 to 628, and performs switching between the sub-antenna and the diversity receivers 626 to 628.

  The first mixer 680 is connected to each of the WCDMA2000 receiver 621, the WCDMA / PCS1900 combined receiver 622, and the WCDMA / GSM850 combined receiver 623 of the main reception band, and the high band received from each receiver 621-623. Convert frequency to lower band frequency.

  The second mixer 690 is connected to the DCS1800 receiver 624, the GSM900 receiver 625, and the diversity receivers 626 to 628 of the sub reception band, respectively, and the high frequency band received from the receivers 624 to 628 of each subband is obtained. Convert to a lower frequency band.

  As described above, the world-type multimode / multiband mobile station according to the second embodiment of the present invention has different services (WCDMA / GSM / GPRS / EDGE) but signals in the same frequency band (1900 MHz or 850 MHz). Use a dual-purpose receiver. Among the receivers of the receiving unit 620, the WCDMA / PCS1900 combined receiver 622 and the WCDMA / GSM850 combined receiver 623 are combined receivers. The second LNA 22 of the WCDMA / PCS1900 combined receiver 622 amplifies the received signal based on the WCDMA1900 service method when receiving the WCDMA1900 signal and receives the signal based on the PCS1900 service method when receiving the PCS1900 signal. Amplify the signal. The third LNA 23 of the WCDMA / GSM850 combined receiver 623 amplifies the received signal based on the WCDMA850 service method when receiving the WCDMA850 signal, and amplifies the received signal based on the GSM850 service method when receiving the GSM850 signal. To do.

  In the first embodiment of the present invention, an LNA that amplifies only a single-service received signal is used. Therefore, a separate LNA should be used for each service. However, in the second embodiment of the present invention, as described above, reception signals (WCDMA signal or PCS signal, WCDMA signal or GSM signal) of different service schemes can be amplified in the same band. By using the dual-purpose LNAs 22 and 23, the number of LNAs is reduced, and it is not necessary to provide a separate receiver for each service.

  In addition, as described above, the multimode / multiband mobile station according to the second embodiment of the present invention includes necessary mixers for the main reception band receivers 621 to 623 and the sub reception band receivers 624 to 628, respectively. By using one integrated mixer 680, 690, a small number of mixers are required.

  In the above description, the multi-mode / multi-band mobile station supporting frequency services and frequency bands used around the world has been described as an example. However, in the European region, since communication services in the WCDMA 1900 MHz band and the WCDMA 850 MHz band are not provided, a transmitter / receiver in the WCDMA 1900 MHz band and the WCDMA 850 MHz band is unnecessary.

  Therefore, a multi-mode / multi-band mobile station supporting the WCDMA 2000 MHz band, PCS 1900 MHz band, DCS 1800 MHz band, GSM 900 MHz band, and GSM 850 MHz band used in the European region will be described below.

  In particular, as shown in FIG. 5, in Europe, the WCDMA 2000 MHz band is the main reception band, and the PCS 1900 MHz band, the DCS 1800 MHz band, the GSM 900 MHz band, and the GSM 850 MHz band are the sub reception bands. Therefore, in the European type multimode / multiband mobile station according to the second embodiment of the present invention, the WCDMA2000 receiver is used as the main receiver, and the PCS1900 MHz band, the DCS1800 MHz band, the GSM900 MHz band, and the GSM850 MHz band are used as the sub receivers. The case where it does is demonstrated.

  A European multimode / multiband mobile station according to an embodiment of the present invention is shown in FIG. FIG. 7 is a specific circuit diagram of a European multimode / multiband mobile station according to an embodiment of the present invention.

  Referring to FIG. 7, a transmitting unit 710 of a European multimode / multiband mobile station according to an embodiment of the present invention includes a WCDMA2000 transmitter 711, a DCS1800 / PCS1900 transmitter 712, and a GSM850 / GSM900 transmitter 713. . Each of the transmitters 711 to 713 outputs a transmission signal corresponding to its own service and frequency band.

  The receiving unit 720 receives WCDMA2000 MHz, GSM / GPRS / EDGE (PCS) 1900 MHz, GSM / GPRS / EDGE (GSM) 850 MHz, GSM / GPRS / EDGE (DCS) 1800 MHz, and GSM / GPRS / EDGE (GSM) 900 MHz bands. To include a receiver.

  That is, the receiving unit 720 includes a WCDMA2000 receiver 721, a PCS1900 receiver 722, a GSM850 receiver 723, a DCS1800 receiver 724, a GSM900 receiver 725, and a WCDMA2000 (D) diversity receiver 726.

  The WCDMA2000 receiver 721 includes an LNA 61 that amplifies a low signal received through the main antenna based on the WCDMA2000 service.

  The PCS 1900 receiver 722 includes a band-pass filter 52 that passes a PCS 1900 MHz band reception signal received through the main antenna and does not pass a leak signal due to a transmission signal, and an LNA 62 that amplifies the received PCS 1900 MHz band reception signal. . Here, the LNA 62 is a dual-purpose LNA that amplifies both the WCDMA 1900 MHz signal and the PCS 1900 MHz signal. However, since it is a European type according to the embodiment of the present invention and does not need to receive the WCDMA 1900 MHz signal, it operates to amplify only the PCS 1900 MHz signal. To do.

  The GSM850 receiver 723 includes a band-pass filter 53 that passes a GSM850 MHz band received signal received through the main antenna and does not pass a leak signal due to a transmission signal, and an LNA 63 that amplifies the received GSM850 MHz band received signal. . Here, the LNA 63 is a dual-purpose LNA that amplifies both the WCDMA 850 MHz signal and the GSM 850 MHz signal, but the European type according to the embodiment of the present invention does not need to receive the WCDMA 850 MHz signal, and thus operates to amplify only the GSM 850 MHz signal. .

  The DCS1800 receiver 724 includes a bandpass filter 54 that passes a DCS1800 MHz band received signal received through the main antenna and does not pass a leakage signal due to a transmission signal, and an LNA 64 that amplifies the received DCS1800 MHz band received signal. .

  The GSM900 receiver 725 includes a bandpass filter 55 that passes a received signal in the GSM900 MHz band received through the main antenna and does not pass a leakage signal due to the transmission signal, and an LNA 65 that amplifies the received received signal in the GSM900 MHz band. .

  WCDMA2000 diversity receiver 726 includes a band-pass filter 56 that passes a diversity signal in the WCDMA2000 MHz band received through the sub-antenna and does not pass a leakage signal due to the transmission signal, and an LNA 66 that amplifies the diversity signal.

  The duplex unit 730 includes a duplexer 731 connected to the WCDMA2000 transmitter 711 and the WCDMA2000 receiver 721. The duplexer 731 outputs the WCDMA2000 MHz transmission signal output from the WCDMA2000 transmitter 711 to the main antenna, and outputs the WCDMA2000 MHz reception signal to the WCDMA2000 receiver 721.

  The switch and power amplification unit 740 is connected to the DCS1800 / PCS1900 transmitter 712 and the GSM850 / GSM900 transmitter 713 of the transmission unit 710, and receives the PCS1900 receiver 722, GSM850 receiver 723, DCS1800 receiver 724, and GSM900 reception of the reception unit 720. Connected to the device 725. The switch and power amplification unit 740 includes a transmission / reception and band selection switch 741 for selecting transmission / reception of each transmission / reception signal and a band, and first and second power amplifiers 742 and 743 for amplifying the power of each transmission signal. including.

  The transmission / reception and band selection switch 741 includes transmission signals output from the DCS1800 / PCS1900 transmitter 712 and the GSM850 / GSM900 transmitter 713, the PCS1900 receiver 722, the GSM850 receiver 723, the DCS1800 receiver 724, and the GSM900 receiver 725. Is separated from the received signal. The transmission / reception and band selection switch 741 selects the DCS1800 MHz band and the PCS1900 MHz band supported by the DCS1800 / PCS1900 transmitter 712, and selects the GSM850 MHz band and GSM900MHz band supported by the GSM850 / GSM900 transmitter 713. Select the frequency band to be transmitted in the band. The first power amplifier 742 amplifies the power of the transmission signals in the DCS 1800 MHz band and the PCS 1900 MHz band output from the DCS 1800 / PCS 1900 transmitter 712. The second power amplifier 743 amplifies the power of the transmission signals in the GSM850 MHz band and the GSM900 MHz band output from the GSM850 / GSM900 transmitter 713.

  The first antenna switch 750 is connected to the duplex unit 730 and the switch and power amplification unit 740, performs switching between the main antenna and the duplex unit 730, and between the main antenna and the switch and power amplification unit 740. Perform switching.

  The first mixer 780 is connected to a WCDMA2000 receiver 721 for receiving a signal in the main reception band, and converts a high band frequency received from the WCDMA2000 receiver 721 into a low band frequency.

  The second mixer 790 is connected to the PCS1900 receiver 722, the GSM850 receiver 723, the DCS1800 receiver 724, the GSM900 receiver 725, and the WCDMA2000 diversity receiver 726 for receiving signals in the sub reception band. The high band frequency received from ˜726 is converted to a low band frequency.

  As described above, in the European type multimode / multiband mobile station according to the embodiment of the present invention, the LNA 62 is a dual-purpose LNA that amplifies both the WCDMA 1900 MHz signal and the PCS 1900 MHz signal. However, since the WCDMA 1900 MHz signal is not used, Used to amplify. The LNA 63 is a dual-purpose LNA that amplifies both the WCDMA850 MHz signal and the GSM850 MHz signal. However, since the WCDMA850 MHz signal is not used, only the GSM850 MHz signal is used.

  The European multimode / multiband mobile station according to the embodiment of the present invention uses a mixer of a receiver 721 in a main reception band and a mixer of receivers 722 to 726 in a sub reception band, and one mixer 780 and 790 respectively. This requires a small number of mixers.

  As shown in FIG. 5, in the United States, WCDMA 1900 MHz, WCDMA 850 MHz, GSM / GPRS / EDGE (PCS) 1900 MHz, GSM / GPRS / EDGE (GSM) 850 MHz band is the main reception band, GSM / GPRS / EDGE (DCS) 1800 MHz, The GSM / GPRS / EDGE (GSM) 900 MHz band is the sub reception band. Therefore, in a US type multimode / multiband mobile station according to an embodiment of the present invention, a WCDMA1900, WCDMA850, PCS1900, GSM850 receiver is used as a main receiver, and a DCS1800, GSM900 receiver and a diversity receiver are used as sub receivers. The case of using will be described.

  Such a US type multimode / multiband mobile station according to an embodiment of the present invention is shown in FIG. FIG. 8 is a specific circuit diagram of a US type multimode / multiband mobile station according to an embodiment of the present invention.

  Referring to FIG. 8, a transmitter 810 of a US type multimode / multiband mobile station according to an embodiment of the present invention includes a WCDMA1900 transmitter 811, a WCDMA850 transmitter 812, a DCS1800 / PCS1900 transmitter 813, and a GSM850 / GSM900 transmitter. 814. Each of the transmitters 811 to 814 outputs a transmission signal corresponding to its own service and frequency band.

  The receiving unit 820 includes WCDMA 1900 MHz, WCDMA 850 MHz, GSM / GPRS / EDGE (PCS) 1900 MHz, GSM / GPRS / EDGE (GSM) 850 MHz, GSM / GPRS / EDGE (DCS) 1800 MHz, GSM / GPRS / EDGE (GSM) 900 MHz band. A receiver for receiving the signals and signals in the WCDMA 1900 MHz and WCDMA 850 MHz bands.

  The receiving unit 820 includes a WCDMA / PCS1900 combined receiver 821, a WCDMA / GSM850 combined receiver 822, a DCS1800 receiver 823, a GSM900 receiver 824, a WCDMA1900 (D) diversity receiver 825, and a WCDMA850 (D) diversity receiver 826. It is comprised including.

  The WCDMA / PCS 1900 combined receiver 821 includes an LNA 81 that amplifies a low signal received through the main antenna based on the WCDMA 1900 service scheme or the GSM / GPRS / EDGE (PCS) 1900 service scheme. The WCDMA / GSM850 combined receiver 822 includes an LNA 82 that amplifies a low signal received through the main antenna based on the WCDMA850 service scheme or the GSM / GPRS / EDGE (GSM) 850 service scheme.

  The DCS 1800 receiver 823 includes a band-pass filter 73 that allows a DCS 1800 MHz band received signal received through the main antenna to pass and does not allow a leakage signal due to a transmission signal to pass, and an LNA 83 that amplifies the received DCS 1800 MHz band received signal. .

  The GSM900 receiver 824 includes a bandpass filter 74 that passes a GSM900 MHz band reception signal received through the main antenna and does not pass a leakage signal due to a transmission signal, and an LNA 84 that amplifies the received GSM900 MHz band reception signal. .

  The WCDMA 1900 (D) diversity receiver 825 includes a band-pass filter 75 that passes the WCDMA 1900 MHz diversity signal received through the sub-antenna and does not pass the leakage signal due to the transmission signal, and an LNA 85 that amplifies the received WCDMA 1900 MHz diversity signal. .

  The WCDMA 850 (D) diversity receiver 826 includes a band pass filter 76 that passes the WCDMA 850 MHz diversity signal received through the sub-antenna and does not pass a leakage signal due to the transmission signal, and an LNA 86 that amplifies the received WCDMA 850 MHz diversity signal. .

  The duplex unit 830 includes a first duplexer 831 connected to the WCDMA1900 transmitter 811 and the WCDMA / PCS1900 combined receiver 821, and a second duplexer 832 connected to the WCDMA850 transmitter 812 and the WCDMA / GSM850 combined receiver 822. including.

  The first duplexer 831 outputs the WCDMA 1900 MHz transmission signal output from the WCDMA 1900 transmitter 811 to the main antenna, and outputs the WCDMA 1900 MHz reception signal or PCS 1900 MHz signal received through the main antenna to the WCDMA / PCS 1900 combined receiver 821.

  The second duplexer 832 outputs the WCDMA850 MHz transmission signal output from the WCDMA850 transmitter 812 to the main antenna, and outputs the WCDMA850 MHz reception signal or GSM850 MHz signal received through the main antenna to the WCDMA / GSM850 combined receiver 822.

  The switch and power amplification unit 840 is connected to the DCS1800 / PCS1900 transmitter 813 and the GSM850 / GSM900 transmitter 814 of the transmission unit 810, and is connected to the DCS1800 receiver 823 and the GSM900 receiver 824 of the reception unit 820, respectively. The switch and power amplification unit 840 includes a transmission / reception and band selection switch 841 that selects transmission / reception and band of each transmission / reception signal, and a first power amplifier 842 and a second power for amplifying the power of each transmission signal And an amplifier 843.

  The transmission / reception and band selection switch 841 selectively outputs the DCS1800 / PCS1900 MHz band transmission signals and the GSM850 / GSM900 MHz band transmission signals output from the DCS1800 / PCS1900 transmitter 813 and the GSM850 / GSM900 transmitter 814 to the main antenna. To perform switching. The transmission / reception and band selection switch 841 performs switching for outputting the DCS 1800 MHz band received signal and the GSM 900 MHz band received signal received through the main antenna to the corresponding DCS 1800 receiver 823 and GSM 900 receiver 824, respectively. The transmission / reception and band selection switch 841 selects a frequency band to be transmitted among the DCS1800 MHz band and the PCS1900 MHz band supported by the DCS1800 / PCS1900 transmitter 813, and the GSM850 MHz band and the GSM900 MHz band supported by the GSM850 / GSM900 transmitter 814. Switching is performed to select a frequency band to be transmitted. The first power amplifier 842 amplifies the power of transmission signals in the DCS 1800 MHz band and the PCS 1900 MHz band output from the DCS 1800 / PCS 1900 transmitter 813. The second power amplifier 843 amplifies the power of the transmission signals in the GSM850 MHz band and the GSM900 MHz band output from the GSM850 / GSM900 transmitter 814.

  The first antenna switch 850 is connected to the duplex unit 830 and the switch and power amplification unit 840, performs switching between the main antenna and the duplex unit 830, and between the main antenna and the switch and power amplification unit 840. Perform switching.

  The second antenna switch 860 is connected to each of the diversity receivers 825 and 826, and performs switching between the sub-antenna and the diversity receivers 825 and 826.

  The first mixer 880 is connected to WCDMA 1900 MHz, WCDMA 850 MHz, PCS 1900 MHz, GSM 850 MHz bands, that is, receivers 821 and 822 that receive the main reception band, and converts the high band frequency of each main reception band signal to a low band frequency. To do.

  The second mixer 890 is respectively connected to receivers 823 to 826 that receive signals of DCS 1800 MHz and GSM 900 MHz bands and sub reception bands corresponding to diversity bands of WCDMA 1900 MHz and WCDMA 850 MHz bands. Convert frequency to lower band frequency.

  As described above, the US type multimode / multiband mobile station according to the embodiment of the present invention receives signals in the same frequency band (1900 MHz or 850 MHz) even if the radio interface standards (WCDMA / DCS or GSM) are different. A WCDMA / PCS 1900 combined receiver 821 and a WCDMA / GSM 850 combined receiver 822 are used. When receiving the WCDMA1900 signal, the LNA 81 of the WCDMA / PCS1900 combined receiver 821 amplifies the received signal based on the WCDMA1900 service method, and amplifies the received signal based on the PCS1900 service method when receiving the PCS1900 signal. The LNA 82 of the WCDMA / GSM850 combined receiver 822 amplifies the received signal based on the WCDMA850 service method when receiving the WCDMA850 signal, and amplifies the received signal based on the GSM850 service method when receiving the GSM850 signal. To do. In the embodiment of the present invention, as described above, the dual-purpose LNAs 81 and 82 that amplify the reception signals (WCDMA signal or PCS signal, WCDMA signal or GSM signal) of different radio interface standards if they are in the same band. By using it, the number of LNAs can be reduced and no separate receivers can be provided for each service.

  A US type multimode / multiband mobile station according to an embodiment of the present invention includes a WCDMA 1900 MHz, WCDMA 850 MHz, PCS 1900 MHz, GSM 850 MHz band, that is, a WCDMA / PCS 1900 combined receiver 821 and a WCDMA / GSM 850 combined receiver 822 SAW filter 81 corresponding to the main reception band. , 82 is used to improve the reception sensitivity of the main reception band.

  As described above, the U.S. multimode / multiband mobile station according to the embodiment of the present invention is different from the mixers of the main reception band receivers 821 and 822 and the sub reception band receivers 823 to 826, respectively. By using one dual-purpose mixer 880, 890, a small number of mixers are required.

  As described above, the signal reception operation of the multimode / multiband mobile station according to the second embodiment of the present invention will be described in detail below.

  FIG. 9 is a block diagram illustrating a reception operation of a multimode / multiband mobile station according to the second embodiment of the present invention. FIG. 9 shows components for receiving operation, a baseband processing unit, and a modem unit among the components of the multimode / multiband mobile station according to the second embodiment of the present invention.

  Referring to FIG. 9, the modem unit 990 outputs a switch control signal and an SPI signal for receiving a desired band signal of a desired mode among multimode / multiband signals.

  The switch control signal includes a first switch control signal for controlling the first antenna switch 910, a third switch control signal for controlling the second antenna switch 920, and a transmission / reception and band selection switch 940. And a second switch control signal for controlling.

  The first switch control signal is a control signal for selecting the reception mode (WCDMA or GSM) of the main reception signal and the reception frequency band among the multimode / multiband signals, and is applied to the first antenna switch 910. Is done. The second switch control signal is a signal for selecting the frequency band of the GSM mode when the reception mode is selected as the GSM mode by the first switch control signal, and is applied to the transmission / reception and band selection switch 940. . The third switch control signal is a signal for selecting whether to perform WCDMA diversity reception, and is applied to the second antenna switch 920.

  The first antenna switch 910 performs a switching operation according to the first switch control signal to connect the duplexer of the corresponding mode and band among the duplexers of the first antenna and the duplex unit 930, or the first antenna switch 910 A transmission / reception and band selection switch 940 is connected. Duplex section 930 includes a duplexer for receiving each band in the WCDMA mode and a duplexer for receiving each band in the WCDMA / GSM combined mode. When the duplexer for receiving each band in the WCDMA mode is connected to the first antenna, the duplexer transmits a signal received through the first antenna to the WCDMA receiver 952. When a duplexer for receiving the WCDMA / GSM combined mode band is connected to the first antenna, the WCDMA / GSM combined band signal received through the first antenna is transmitted to the WCDMA / GSM combined receiver 954. To do.

  The transmission / reception and band selection switch 940 is connected to the first antenna switch 910 and the GSM receiver 956 of the corresponding band by the second switch control signal, and the signal received through the first antenna is transmitted through the first antenna switch 910. It is transmitted to the GSM receiver 956 of the corresponding band.

  The second antenna switch 920 selects whether or not to receive the WCDMA diversity signal according to the third switch control signal. When the second antenna switch 920 is selected to receive the WCDMA diversity signal, the second antenna switch 920 connects the second antenna and the corresponding band receiver of the WCDMA diversity receiving unit 958 and receives the WCDMA diversity received through the second antenna. The signal is transmitted to WCDMA diversity receiver 958.

  Each of WCDMA receiver 952, WCDMA / GSM combined receiver 954, GSM receiver 956, and WCDMA diversity receiver 958 receives a signal corresponding to the corresponding mode and band, and the received signal is adapted to the corresponding mode and band. Output with low noise amplification.

  The baseband processing unit 980 is one of the WCDMA / GSM combined receiver 954, the GSM receiver 956, and the WCDMA diversity receiving unit 958 corresponding to the mode and the band to be received according to the SPI signal from the modem unit 990. Control so that only the receiver operates.

  When receiving the mode and band signal to be received through the WCDMA / GSM receiver 954, the baseband processing unit 980 determines whether the received signal is a WCDMA signal or a GSM signal depending on whether the received signal is a WCDMA / GSM signal. The low noise amplification gain of the dual-purpose receiver 954 is controlled. For example, when the signal received through the WCDMA / GSM receiver 954 is a WCDMA signal, the baseband processor 980 applies the low noise amplification gain of the WCDMA / GSM receiver 954 to the WCDMA mode. A low noise amplification gain adjustment signal for adjusting with the gain to be output is output. If the received signal is a GSM signal, the baseband processing unit 980 outputs a low noise amplification gain adjustment signal for controlling the low noise amplification gain of the WCDMA / GSM combined receiver 954 with a gain corresponding to the GSM mode. To do.

  Also, the baseband processing unit 980 controls the first local frequency L01 provided to the first mixer 960 or the second local frequency L02 provided to the second mixer 970 by the SPI signal. For example, when the mode and band signal to be received by the SPI signal is a WCDMA mode band signal received through the WCDMA receiver 952, the baseband processing unit 980 sets the first local frequency to the corresponding WCDMA channel frequency. Control. Then, the baseband processing unit 980 receives the WCDMA corresponding to the first local frequency when the mode and band signal to be received by the SPI signal is a WCDMA / GSM combined mode band signal received through the WCDMA / GSM combined receiver 954. Control by channel frequency or GSM channel frequency. Then, when the mode and band signal to be received by the SPI signal are GSM mode band signals received through the GSM receiver 952, the baseband processing unit 980 converts the second local frequency to the corresponding GSM channel frequency. Control.

  The first mixer 960 uses the first local frequency controlled for each mode and band to lower the low-noise amplified signal from the WCDMA receiver 952, WCDMA / GSM combined receiver 954, that is, the main band receiver. Convert. In addition, the second mixer 980 uses the first local frequency controlled for each mode and band to lower the low-noise amplified signal from the GSM receiver 956 and the WCDMA diversity receiver 958, that is, the sub-band receiver. Convert.

  The baseband processing unit 980 converts the down-converted signals from the first mixer 960 and the second mixer 970 into first and second baseband signals, respectively, and converts the converted first and second baseband signals. The band signal is divided into a WCDMA baseband signal and a GSM baseband signal and output.

  Modem section 990 demodulates each of the WCDMA baseband signal and GSM baseband signal output from baseband processing section 980 using the corresponding modem.

  In other words, according to the signal reception operation of the multimode / multiband mobile station according to the second embodiment of the present invention as described above, the modem unit 990 desires a desired mode among the multimode / multiband signals. A switch control signal and an SPI signal for receiving the band signal are output.

  Then, the first antenna switch 910, the transmission / reception and band selection switch 940, and the second antenna switch 920 have a reception mode (WCDMA, GSM), a reception frequency band, and a reception mode according to a switch control signal from the modem unit 990, respectively. When in the GSM mode, switching is performed to select whether to receive the frequency band and WCDMA diversity.

  Also, the baseband processing unit 980 performs control so that only one receiver corresponding to the mode and band to be received is operated among the receivers for each mode and band by the SPI signal from the modem unit 990. . After converting the received signal into a baseband signal, the baseband processing unit 980 classifies and outputs the baseband signal depending on whether the baseband signal is a WCDMA baseband signal or a GSM baseband signal.

  Modem section 990 demodulates each of the WCDMA baseband signal and GSM baseband signal output from baseband processing section 980 using the corresponding modem.

  Hereinafter, the signal reception operation of the multimode / multiband mobile station according to the second embodiment of the present invention will be described in more detail.

  FIG. 10 shows more specifically the configurations of the baseband processing unit 980 and the modem unit 990 for performing the signal reception operation of the multimode / multiband mobile station according to the second embodiment of the present invention.

  FIG. 10 shows an example in which a multimode / multiband mobile station according to the second embodiment of the present invention supports WCDMA2000, WCDMA1900, WCDMA850, DCS1800, PCS1900, GSM900, and GSM850 signals.

  Referring to FIG. 10, a transmission unit 610, a reception unit 620, a duplex unit 630, a switch and power amplification unit 640, a first antenna switch 650, a second antenna switch 660, a first mixer 680, and a second mixer 690 is similar to the element shown in FIG. 6 above. Accordingly, the transmission unit 610, the reception unit 620, the duplex unit 630, the switch and power amplification unit 640, the first antenna switch 650, the second antenna switch 660, the first mixer 680, and the second mixer 690 are illustrated. 6 will be referred to, and the detailed description thereof will be omitted here. Hereinafter, configurations and operations of the baseband processing unit 980 and the modem unit 990 will be described.

  The modem control unit 991 of the modem unit 990 receives a first signal for receiving a signal of a desired mode and band among multimode / multiband signals, for example, WCDMA2000, WCDMA1900, WCDMA850, DCS1800, PCS1900, GSM900, and GSM850 signals. To output third switch control signals SWC1, SWC2, and SWC3.

  The first switch control signal SWC1 is a control signal for selecting a desired reception mode (WCDMA or GSM) and a reception frequency band among WCDMA2000, WCDMA1900, WCDMA850, DCS1800, PCS1900, GSM900, and GSM850 signals.

  The first antenna switch 650 is connected to the duplexer of the corresponding mode and band among the first antenna and the first to third duplexers 631 to 633 of the duplex unit 630 by the first switch control signal SWC1, or By connecting one antenna to the switch and the power amplification unit 640, a receiver corresponding to a desired reception mode and band can be selected.

  For example, when the first antenna switch 650 receives a first switch control signal for receiving a signal in the GSM850 band, the first antenna switch 650 connects the first antenna and the third duplexer 633 and passes through the first antenna. The received GSM850 signal is transmitted to the WCDMA / GSM850 combined receiver 623. The first antenna switch 650 connects the first antenna to the transmission / reception and band selection switch 641 when receiving the first switch control signal for receiving the DCS 1800 band signal. The received signal is transmitted to the DCS 1800 receiver 624 through the transmission / reception and band selection switch 641.

  The transmission / reception and band selection switch 641 connects the first antenna switch 650 and the GSM receiver in the corresponding band by the second switch control signal SWC2 to select a desired GSM receiver. For example, the transmission / reception and band selection switch 640 connects the first antenna switch 650 and the GSM900 receiver 625 when receiving the second switch control signal for receiving the GSM900 band signal among the GSM reception signals. Then, the signal received through the first antenna switch 650 is transmitted to the GSM 900 receiver 625.

  The second antenna switch 660 performs a switching operation of connecting and releasing the second antenna and the corresponding band receiver of the WCDMA diversity receiving unit 370 according to the third switch control signal SWC3, thereby determining whether the WCDMA diversity signal can be received. Is selected.

  As described above, the modem control unit 991 of the modem unit 990 outputs the first to third switch control signals SWC1 to SWC3 for receiving signals of a desired mode and band, and simultaneously processes the received signals. The SPI signal is output to the baseband processing unit 980.

  Baseband processing section 980 includes a control section 982, a first baseband processing section 984, a second baseband processing section 986, and a multiplexer 988.

  The control unit 982 performs control so that only the receiver corresponding to the mode and band to be received in each mode and band-specific receivers 621 to 628 operates according to the SPI signal received from the modem control unit 991. To do. For example, the control unit 982 performs control so that only the WCDMA2000 receiver 621 and the WCDMA2000 (D) receiver 626 operate according to the SPI signal received from the modem control unit 991 when the signal to be received is in the WCDMA2000 band. To do. In addition, when the signal to be received is in the GSM850 band, the control unit 982 controls the WCDMA / GSM850 combined receiver 622 to operate only by the SPI signal from the modem control unit 991.

  Then, the control unit 982 controls the low noise amplification (LNA) gain of the WCDMA / GSM combined receiver with one of WCDMA and GSM when the signal to be received is in the WCDMA / GSM combined band. A control signal for outputting is output. For example, when the signal to be received is one of the WCDMA / PCS1900 bands, the control unit 982 sets the gain of the LNA 22 of the WCDMA / PCS1900 combined receiver 622 to one band of WCDMA1900 or PCS1900. A signal LC1 for controlling with the corresponding gain is output. In addition, when the signal to be received is any one of the WCDMA / GSM850 bands, the control unit 982 sets the gain of the LNA 23 of the WCDMA / GSM850 combined receiver 623 to one band of WCDMA850 or GSM850. The signal LC2 for controlling with the corresponding gain is output.

  As described above, under the control of the control unit 982, each mode and band-specific receivers 621 to 628 amplify a signal corresponding to its own band with low noise. In particular, the WCDMA / PCS 1900 combined receiver 622 and the WCDMA / GSM 850 combined receiver 623 control the LNA gain with the gain corresponding to WCDMA or the gain corresponding to GSM by the signals LC1 and LC2 from the control unit 982, and at the same time, the WCDMA signal. Alternatively, each GSM signal is amplified with low noise.

  Here, FIGS. 11A and 11B show a method in which the WCDMA / PCS 1900 combined receiver 622 and the WCDMA / GSM 850 combined receiver 623 respectively control the LNA gain to a gain corresponding to WCDMA or a gain corresponding to GSM. Referring to FIGS. 11A and 11B, when receiving a WCDMA signal, the WCDMA / PCS 1900 combined receiver 622 and the WCDMA / GSM 850 combined receiver 623 are based on WCDMA signal reception strengths P1 and P2, as shown in FIG. 11A. The low noise amplification gain is controlled in three stages. In addition, when receiving a GSM signal, the WCDMA / PCS1900 dual-purpose receiver 622 and the WCDMA / GSM850 dual-purpose receiver 623 have a low noise amplification gain of 3 based on the GSM signal reception strengths P3 and P4 as shown in FIG. 11B. Control in stages. The reception strengths P1, P2, P3, and P4 can be changed by a modem algorithm.

  Signals amplified with low noise by the receivers 621 to 628 for each mode and band are input to a first mixer 680 or a second mixer 690 which is a wideband mixer.

  The control unit 982 controls the first local frequency L01 provided to the first mixer 680 and the second local frequency L02 provided to the second mixer 690 with the corresponding reception mode and the local frequency corresponding to the band. . Therefore, the first mixer 680 receives a signal input from one of the WCDMA2000 receiver 621, the WCDMA / PCS1900 combined receiver 622, and the WCDMA / GSM850 combined receiver 633 corresponding to the main band at the first local frequency. Down-convert using L01. In addition, the second mixer 690 uses a second local frequency to input a signal input from one of the DCS1800 receiver 624, the GSM900 receiver 625, and the WCDMA diversity receivers 626 to 628 corresponding to the subband. Convert down.

  The main band signal down-converted by the first mixer 680 is input to the first baseband processing unit 984, and the first baseband processing unit 984 converts the main band signal down-converted under the control of the control unit 982. Is output as a first baseband signal. Further, the sub-band signal down-converted by the second mixer 690 is input to the second baseband processing unit 986, and the second baseband processing unit 986 is sub-converted under the control of the control unit 982. The band signal is output as the second baseband signal.

  The baseband signal processing operations of the first and second baseband processing units 984 and 986 are shown in FIG. FIG. 12 is a block diagram illustrating a baseband signal processing operation of a multimode / multiband mobile station according to the second embodiment of the present invention.

  Referring to FIG. 12, the first baseband processing unit 984 includes an A / D converter 1, a digital AGC (Automatic Gain Controller) 2, a channel filter 3, a DC offset correction unit 4, and a D / A conversion. And 5.

  The A / D converter 1 receives the main band signal down-converted by the first mixer 680 and converts it into a digital signal. The digital AGC 2 controls the gain of the converted main band digital signal. The channel filter 3 may be an LPF (Low Pass Filter), receives a digital signal in the main band, and performs filtering so that only the corresponding channel signal is passed. The DC offset correction unit 4 corrects the DC offset of the filtered channel signal. The D / A converter 5 converts the corresponding channel signal corrected for DC offset into an analog signal and outputs it as a first baseband signal.

  According to the second embodiment of the present invention, the main band signal may be in the WCDMA2000, WCDMA1900, PCS1900, WCDMA850, and GSM850 bands. The control unit 982 controls the first baseband processing unit 984 according to the SPI signal received from the modem control unit 991. Thereby, the A / D converter 1, the digital AGC 2, the channel filter 3, the DC offset correction unit 4, and the D / A converter 5 of the first baseband processing unit 984 receive each under the control of the control unit 982. It operates by changing its characteristics according to the band characteristics.

  For example, when the reception band is a GSM850 band, the A / D converter 1, the digital AGC 2, the channel filter 3, the DC offset correction unit 4, and the D / A converter 5 of the first baseband processing unit 984 are respectively It operates according to the GSM850 band characteristics under the control of the control unit 982. When the reception band is the WCDMA850 band, the A / D converter 1, the digital AGC 2, the channel filter 3, the DC offset correction unit 4, and the D / A converter 5 of the first baseband processing unit 984 are respectively Under the control of the control unit 982, it operates according to the WCDMA850 band characteristics.

  The second baseband processing unit 986 operates in a manner similar to the first baseband processing unit 984, and is a sub-band signal, that is, DCS1800, GSM900, WCDMA2000 (D), WCDMA1900 (D), WCDMA850 (D). The band signal is output as the second baseband signal.

  Since the first baseband processing unit 984 processes WCDMA2000, WCDMA1900, PCS1900, WCDMA850, and GSM850 bands, the first baseband signal output from the first baseband processing unit 984 is a WCDMA signal or a GSM signal. Can be.

  In addition, the second baseband processing unit 986 processes the DCS1800, GSM900, WCDMA2000 (D), WCDMA1900 (D), and WCDMA850 (D) bands, so that the second baseband processing unit 986 outputs the second baseband processing unit 986. The baseband signal can be a GSM signal or a WCDMA diversity signal.

  The baseband processing unit 980 is divided into a WCDMA baseband signal, a GSM baseband signal, and a WCDMA diversity signal, and outputs first and second baseband signals to the modem unit 990.

  Further, referring to FIG. 9, the modem unit 990 receives a baseband signal corresponding to WCDMA through the I1Q1 path, and receives a baseband signal corresponding to GSM and WCDMA diversity through the I2Q2 path.

  Therefore, when the first baseband signal output from the first baseband processing unit 984 is a WCDMA signal, the baseband processing unit 980 outputs the first baseband signal to the I1Q1 path, and When one baseband signal is a GSM signal, the GSM baseband signal is output to the I2Q2 path through the multiplexer 988.

  The baseband processing unit 980 outputs the second baseband signal (GSM or WCDMA diversity signal) output from the second baseband processing unit 986 to the I2Q2 path through the multiplexer 988.

  The multiplexer 988 outputs the GSM baseband signal output from the first baseband processing unit 984 or the GSM or WCDMA diversity baseband signal output from the second baseband processing unit 986 to the I2Q2 path.

  The WCDMA modem 992 of the modem unit 990 receives and demodulates the WCDMA baseband signal through the I1Q1 path.

  The demultiplexer 993 of the modem unit 990 receives the GSM or WCDMA diversity baseband signal through the I2Q2 path. When the GSM baseband signal is received, the GSM baseband signal is output to the GSM modem 994, and the WCDMA diversity baseband signal is received. When received, it outputs a WCDMA diversity baseband signal to WCDMA diversity modem 998.

  The GSM modem 994 receives and demodulates the GSM baseband signal. WCDMA diversity modem 998 receives and demodulates the WCDMA baseband signal.

  As described above, the specific embodiments have been described in the detailed description of the present invention. However, it is apparent to those skilled in the art that various changes in form and details are possible. . For example, as described above, in the embodiment of the present invention, an example in which a dual-purpose receiver that receives both a WCDMA 1900 MHz signal and a PCS 1900 MHz signal and a dual-purpose receiver that receives both a WCDMA 850 MHz signal and a GSM 850 MHz signal has been described. Different services, that is, different radio interface standards, and signals in the same frequency band are not limited to the specific signals described above. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined based on the description of the scope of claims and equivalents thereof.

1 is a schematic diagram illustrating a wireless communication system in which a multimode / multiband mobile station communicates with a base station that operates based on various wireless interface standards. 1 is a block configuration diagram illustrating a multimode / multiband mobile station according to a first embodiment of the present invention. 3 is a flowchart illustrating a search mode operation performed by a multimode / multiband mobile station according to the first embodiment of the present invention. FIG. 5 is a block diagram illustrating a multimode / multiband mobile station according to a second embodiment of the present invention. 7 is a table showing frequency bands and services supported by a multimode / multiband mobile station according to a second embodiment of the present invention. FIG. 5 is a specific circuit diagram for a world-type multimode / multiband mobile station according to a second embodiment of the present invention. 4 is a specific circuit diagram for a European multimode / multiband mobile station according to a second embodiment of the present invention; FIG. FIG. 5 is a specific circuit diagram for a US type multimode / multiband mobile station according to a second embodiment of the present invention; FIG. 6 is a block configuration diagram illustrating a reception operation of a multimode / multiband mobile station according to a second embodiment of the present invention. FIG. 6 is a circuit diagram illustrating a baseband processing unit and a modem unit of a multimode / multiband mobile station according to a second embodiment of the present invention. It is a figure which shows the control method of the low noise amplification gain with respect to WCDMA with the WCDMA / GSM combined receiver of the multimode / multiband mobile station by the 2nd Embodiment of this invention. It is a figure which shows the control method of the low noise amplification gain with respect to GSM with the WCDMA / GSM combined receiver of the multimode / multiband mobile station by the 2nd Embodiment of this invention. FIG. 7 is a block configuration diagram illustrating a baseband signal processing operation of a multimode / multiband mobile station according to a second embodiment of the present invention.

Explanation of symbols

100 wireless communication system 101, 102 base station 111 multimode / multiband mobile station (or wireless terminal)
201 antenna array 205 switchplexer 210a, 210b reconfigurable receive path 212 input terminal consisting of selectable low noise amplifier (LNA) 215 switch 216 wideband video rejection (IR) mixer 218 voltage controlled oscillator ( VCO) and variable frequency oscillator block 220 Configurable blocking bandpass filter (BPF)
225 Programmable Variable Gain Amplifier (VGA)
229 Configuration Controller 230 Configurable Anti-aliased Bandpass Filter (BPF)
235 Programmable analog / digital converter (ADC)
240 IF mixer 245 Numerically controlled oscillator (NCO)
250 Digital channel filter block 252 Re-sampler
255 Digital / Analog Converter (DAC)
260 Reconfigurable SDR Modem Block 270 Transmission Path 275, 275a, 275b, 275c Multiple Band Pass Filters 280, 280a, 280b, 280c Multiple Power Amplifiers

Claims (42)

A multimode / multiband mobile station for a wireless network operating based on various wireless interface standards,
A plurality of low noise amplifiers each adapted to a selected frequency band;
NZIF receiving an amplified RF signal from one amplifier selected from the plurality of low noise amplifiers and downconverting the amplified RF signal to generate a first analog intermediate frequency (IF) signal (Near-Zero Intermediate Frequency) Wideband Image Rejection (IR) mixer;
A multi-mode / multi-band mobile station characterized by comprising:   The multimode / multiband mobile station of claim 1, further comprising a switch for coupling the selected low noise amplifier with the NZIF broadband IR mixer.   The multimode / multiband mobile station according to claim 2, wherein the switch selects the low noise amplifier selected according to a first radio interface standard on which the multimode / multiband mobile station operates.   4. The multimode / multiband mobile station of claim 3, further comprising a programmable frequency variable oscillator for supplying an oscillator reference signal having a selectable frequency to the NZIF broadband IR mixer.   5. The multimode / multiband mobile station of claim 4, further comprising a first reconfigurable bandpass filter for filtering the first analog IF signal from the NZIF broadband IR mixer.   6. The first reconfigurable bandpass filter filters the first analog IF signal according to the first radio interface standard on which the multimode / multiband mobile station operates. Multimode / multiband mobile station.   The multi-mode / multi-band mobile station according to claim 6, wherein the first reconfigurable band-pass filter removes unnecessary frequencies from the first analog IF signal.   8. The multimode / multiband mobile station of claim 7, further comprising a programmable variable gain amplifier for amplifying a first filtered analog IF signal from the first reconfigurable bandpass filter.   9. The multimode / multiband mobile station of claim 8, further comprising a second reconfigurable bandpass filter for filtering the first filtered analog IF signal amplified by the programmable variable gain amplifier. .   The multimode / multiband mobile station of claim 9, wherein the second reconfigurable bandpass filter is an anti-alias filter.   The analog / digital (A / D) converter for converting the second filtered IF signal output from the second reconfigurable bandpass filter into a digital IF signal. The described multimode / multiband mobile station.   12. The multimode / multiband mobile station according to claim 11, wherein the programmable variable gain amplifier amplifies the first filtering analog IF signal based on an operating range of the A / D converter.   The multimode / multiband mobile station of claim 12, further comprising a reconfigurable digital IF processing block. An operation method of a multimode / multiband mobile station for a wireless network operating under various wireless interface standards,
Selecting one of a plurality of low noise amplifiers to amplify an incoming radio frequency (RF) signal and adapting each of the plurality of low noise amplifiers to a selected frequency band;
A NZIF broadband IR mixer downconverts the RF signal amplified by the selected low noise amplifier to generate a first analog intermediate frequency (IF) signal;
An operation method characterized by comprising:   The method of claim 14 further comprising coupling the selected low noise amplifier to the NZIF broadband IR mixer using a switch.   The method according to claim 15, wherein the switch selects the low noise amplifier selected according to a first radio interface standard on which the multimode / multiband mobile station operates.   The method of claim 16, wherein the NZIF broadband IR mixer receives an oscillator reference signal having a selectable frequency from a programmable frequency variable oscillator. 18. The method of claim 17, further comprising filtering the first analog IF signal from the NZIF broadband IR mixer with a first reconfigurable bandpass filter.   19. The first reconfigurable bandpass filter filters the first analog IF signal according to the first radio interface standard on which the multimode / multiband mobile station operates. How it works.   The method of claim 19, wherein the first reconfigurable bandpass filter removes unnecessary frequencies from the first analog IF signal. A transmitter for transmitting a multimode / multiband signal through each transmitter; and
The signals corresponding to the same frequency band of the multimode / multiband are received through a dual-purpose receiver that receives together one or more radio signals having different services in the same frequency band, and the same frequency band A receiver that receives signals that do not correspond to the receivers through different frequency band receivers;
A multi-mode / multi-band mobile station characterized by comprising:   The multimode / multiband mobile station according to claim 21, wherein each of the dual-purpose receivers includes a low noise amplifier (LNA) that amplifies received signals in the same frequency band by different service schemes.   The multi-mode / multi-band mobile station according to claim 21, further comprising a duplex unit for separating transmission / reception signals of FDD (Frequency Division Duplex) and TDD (Time Division Duplex).   The multi-mode / multi-band mobile station according to claim 21, further comprising a duplexer for receiving a GSM signal and transmitting it to a GSM receiver.   The multi-plexer according to claim 21, further comprising a duplexer that receives one of a GSM signal or a WCDMA signal in a common band and transmits the received signal to a combined WCDMA / GSM receiver. Mode / multiband mobile station.   The multimode / multiband mobile station according to claim 21, wherein the multimode / multiband includes a WCDMA2000 MHz band, a WCDMA1900 MHz band, a WCDMA850 MHz band, a GSM850 MHz band, a GSMS900 MHz band, a DCS1800 MHz band, and a PCS1900 MHz band. The transmitter is
WCDMA2000 transmitter for transmitting signals in the WCDMA2000 MHz band, WCDMA1900 transmitter for transmitting signals in the WCDMA1900 MHz band, WCDMA850 transmitter for transmitting signals in the WCDMA850 MHz band, DCS1800 / PCS1900 transmitter for transmitting signals in the DCS1800 MHz and PCS1900 MHz bands, and GSM850 MHz The multi-mode / multi-band mobile station according to claim 21, further comprising at least one transmitter among GSM850 / GSM900 transmitters that transmit signals in the GSM900 MHz band. Each frequency band receiver is:
23. The apparatus according to claim 21, further comprising at least one of a WCDMA2000 receiver that receives a WCDMA2000 MHz band signal, a DCS1800 receiver that receives a DCS1800 MHz band signal, and a GSM900 receiver that receives a GSM900 MHz band signal. Multimode / multiband mobile station. Each of the dual-purpose receivers
And a WCDMA / PCS1900 receiver that receives both a WCDMA1900 MHz band signal and a PCS1900 MHz band signal, and a WCDMA / GSM850 receiver that receives both a WCDMA850 MHz band signal and a GSM850 MHz band signal. The multimode / multiband mobile station according to claim 21. A first mixer that converts a high frequency band signal received by a receiver that receives a main reception band, which is a highly utilized band, in a certain region of the multimode / multiband, into a low frequency band signal;
A second mixer for converting a signal in a high frequency band received by a receiver that receives a sub reception band having a low usage rate into a signal in a low frequency band in a certain region of the plurality of frequency bands for each of the plurality of communication services; ,
The multi-mode / multi-band mobile station according to claim 21, further comprising:   The multi-mode / multi-band mobile station according to claim 30, wherein the sub reception band includes a diversity band. A switch unit for performing a switching operation for selecting a mode and a band to be received out of multimode / multiband under a predetermined control;
Among the multimode / multiband signals by the switching operation, a receiver that receives a signal of its own mode and band;
A mixer for down-converting the received signal using a local frequency corresponding to the mode and band to be received;
Under the predetermined control, control the operation of the receiver corresponding to the mode and band to be received among the receivers, baseband process the down-converted received signal, and classify the baseband signal by mode. A baseband processing unit that outputs
A control signal for receiving a signal of a mode and a band to be received is output, the local frequency is controlled by a local frequency corresponding to the mode and a band to be received, and the mode-specific baseband signal is A modem section that demodulates through a modem by mode;
A multi-mode / multi-band mobile station characterized by comprising:   The multimode / multiband mobile station according to claim 32, wherein the multimode / multiband includes each band of WCDMA mode and each band of GSM mode. The receiver is
A WCDMA receiver that receives each band in WCDMA mode;
A GSM receiver that receives each band in GSM mode;
A WCDMA / GSM combined receiver for receiving a common band of the WCDMA and GSM modes;
The multi-mode / multi-band mobile station according to claim 32, comprising: The switch part is
A first antenna switch that performs switching for selecting a reception mode and a frequency band to be received out of each band in the WCDMA mode and each band in the GSM mode under predetermined control;
A band selection switch for selecting a frequency band of the GSM mode when the reception mode is selected as the GSM mode;
A second antenna switch for selecting whether or not WCDMA diversity reception is performed when the reception mode is selected as a WCDMA mode;
34. The multimode / multiband mobile station of claim 33. The mixer is
A first mixer that down-converts signals received by a receiver that receives each band of the WCDMA mode of the multimode / multiband and a common band of the WCDMA and GSM modes;
A second mixer for down-converting a signal received by a receiver that receives each band of the GSM mode and the WCDMA diversity band of the multi-mode / multi-band;
34. The multimode / multiband mobile station of claim 33. The baseband processing unit
A WCDMA mode band-specific signal down-converted by the first mixer under predetermined control, and a WCDMA and GSM mode band-specific signal, a first baseband processing unit that performs baseband processing;
A second baseband processing unit that performs baseband processing on each band of the GSM mode down-converted by the second mixer under predetermined control and the signal for each WCDMA diversity band;
A control unit for controlling processing operations of the first and second baseband processing units according to a reception mode and band characteristics;
The multi-mode / multi-band mobile station according to claim 36, comprising: A first path for transmitting a WCDMA signal to a modem unit among the baseband signals output from the first and second baseband processing units;
A second path for transmitting a GSM signal or a WCDMA diversity signal to the modem unit among the baseband signals output from the first and second baseband processing units;
The multi-mode / multi-band mobile station according to claim 37, comprising: The modem unit is
A WCDMA modem that demodulates the WCDMA baseband signal output from the baseband processing unit;
A GSM modem that demodulates the GSM baseband signal output from the baseband processing unit;
A WCDMA diversity modem that demodulates the WCDMA diversity baseband signal output from the baseband processing unit;
Of the multimode / multiband signals, a modem control unit that outputs a control signal for receiving a signal in a desired mode and band and controls the local frequency corresponding to the mode and band in which the local frequency is to be received. When,
The multi-mode / multi-band mobile station according to claim 37, comprising: Among the multimode / multiband signals, a control signal for receiving a signal of a desired mode and band is:
A switch control signal for controlling the switch unit;
An SPI signal for controlling the baseband processing unit;
40. The multimode / multiband mobile station according to claim 39, comprising:   The baseband processing unit controls the operation of a receiver corresponding to a mode and a band to be received among the receivers by the SPI signal, and the receiver corresponding to the mode and the band to be received is WCDMA / GSM. When the dual band is used, the low noise amplification gain corresponding to the mode and band in which the low noise amplification gain of the WCDMA / GSM receiver is to be received is controlled, and the processing of the first and second baseband processing units 41. The multimode / multiband mobile station according to claim 40, wherein the operation is controlled. The switch control signal for controlling the switch unit is:
A first switch control signal for selecting a reception mode and a frequency band to be received from each band in the WCDMA mode and each band in the GSM mode;
A second switch control signal for selecting a frequency band of the GSM mode when the reception mode is selected as a GSM mode;
A third switch control signal for selecting whether or not the WCDMA diversity reception is performed;
40. The multimode / multiband mobile station according to claim 39, comprising:

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