WO2014047796A1 - Multi-band receiver and signal processing method thereof - Google Patents

Multi-band receiver and signal processing method thereof Download PDF

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Publication number
WO2014047796A1
WO2014047796A1 PCT/CN2012/081975 CN2012081975W WO2014047796A1 WO 2014047796 A1 WO2014047796 A1 WO 2014047796A1 CN 2012081975 W CN2012081975 W CN 2012081975W WO 2014047796 A1 WO2014047796 A1 WO 2014047796A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency band
input signal
bpf
signal received
band input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/081975
Other languages
English (en)
French (fr)
Inventor
Jichang LIAO
Jiangyan Peng
Yong Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to CN201280076074.2A priority Critical patent/CN104798309A/zh
Priority to PCT/CN2012/081975 priority patent/WO2014047796A1/en
Priority to EP12885511.1A priority patent/EP2901558A4/en
Priority to IN913DEN2015 priority patent/IN2015DN00913A/en
Priority to US14/430,609 priority patent/US20150256207A1/en
Publication of WO2014047796A1 publication Critical patent/WO2014047796A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1081—Reduction of multipath noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line

Definitions

  • the embodiments of present invention generally relate to the wireless communication devices, particularly to the multi-band receiver for receiving and processing different frequency band signals in wireless communication system.
  • Wireless communication system continues develop at a rapid pace, and the increasing number of systems and frequency bands in use are conflicting with the customer demand for increased mobility.
  • almost all known wireless communication devices are single band type, since it is difficult to incorporate multi-band capabilities into wireless communication device, with given size and cost limitation.
  • Fig.l depicts one example of dual-band receiving solutions according to the prior art.
  • the different frequency band signals received from antenna will be sent to the two parallel paths.
  • Each of the path including Band Pass Filter (BPF) 101, Low Noise Amplifier 102, BPF 103, Mixer 104 and BPF 105.
  • BPF Band Pass Filter
  • IF Intermediate Frequency
  • VGA Variable Gain Amplifier
  • BPF BPF
  • ADC Analog Digital Converter
  • the traditional multi-band receiving solution cannot be understood as the real multi-band receiving solution, and the application scenario is also limited.
  • an embodiment of present invention provides a multi-band receiver for receiving and processing different frequency band signals, comprising: a direct sampling module, for receiving and processing a low frequency band input signal from a first antenna; at least one single down conversion module, for receiving and processing a high frequency band input signal from a second antenna; a combiner coupled to the direct sampling module and the at least one single down conversion module, for combining the low frequency band input signal received from the direct sampling module and the high frequency band input signal received from the at least one single down conversion module; an Analog Digital Converter (ADC) coupled to the combiner, for converting analog signal received from the combiner into digital signal .
  • ADC Analog Digital Converter
  • an embodiment of present invention comprises: A method for receiving and processing different frequency band signals, comprising: receiving and processing low frequency band input signal by direct sampling module; receiving and processing high frequency band input signal by at least one down conversion module; combining the low frequency band input signal received from said direct sampling module and the high frequency band input signal received from said at least one down conversion module by combiner; converting analog signal received from the combiner into digital signal by an Analog Digital Converter (ADC) .
  • ADC Analog Digital Converter
  • the multi-band receiver can be easily
  • Fig.l illustrates one example of the dual band receiver according to the prior art.
  • Fig.2 illustrates a general structure diagram of a multi-band receiver according to an exemplary embodiment of present invention.
  • Fig.3 illustrates a schematic structural diagram of an multi-band receiver according to an exemplary embodiment of present invention.
  • Fig.4 illustrates a flowchart showing a method for receiving and processing different frequency band signals according to an exemplary embodiment of present invention.
  • Fig.5 illustrates a flowchart showing a processing method performed by a direct sampling module according to an exemplary embodiment of present invention.
  • Fig.6 illustrates a flowchart showing a processing method performed by at least one down conversion module according to an exemplary embodiment of present invention.
  • Fig.7 illustrates signal characteristic analysis of multi-band receiver according to an exemplary embodiment of present invention.
  • Fig.2 illustrates a general structure diagram of a multi-band receiver according to an exemplary embodiment of present invention.
  • the multi-band receiver for receiving and processing different frequency band signals comprises a direct sampling module 201, at least one down conversion module 202, combiner 203 and Analog Digital Converter (ADC) 204.
  • ADC Analog Digital Converter
  • the direct sampling module 201 receives and processes low frequency band input signal. At least one down
  • conversion module 202 receives and processes high frequency band input signal. For example, if there are two high frequency band input signals are input from antenna, two down conversion modules (202-1, 202-2) might be needed, i.e., the number of the down conversion modules are the same as the number of the high frequency band signals input from antenna.
  • low frequency band input signal denotes the signal can be directly sampled without the down conversion.
  • the low frequency band input signal can be the signal with frequency band below or equal to 1 GHz.
  • the high frequency band input signal denotes the signal cannot be directly sampled and should be down converted.
  • the high frequency band input signal can be the signal with frequency band above 1 GHz.
  • the combiner 203 combines the low frequency band input signal received from the direct sampling module 201 and high frequency band input signal received from the at least one down conversion module 202 (202-1, 202-2) .
  • ADC 204 converts analog signal received from the combiner 203 into digital signal.
  • Fig.3 illustrates a schematic structural diagram of a multi-band receiver according to an exemplary embodiment of present invention.
  • the direct sampling module 201 comprises a first Band Pass Filter (BPF)
  • the first BPF 301 filters the low frequency band input signal received from antenna A.
  • the first LNA 302 coupled to the first BPF 301, amplifies the low frequency band input signal received from the first BPF 301.
  • the second BPF 303 coupled to the first LNA 301, filters the low band frequency input signal received from the first LNA
  • the at least one down conversion module comprises a third BPF 304, a second LNA
  • the third BPF 304 filters the high band frequency input signal received from antenna B.
  • the third BPF 304 and first BPF 301 can be the same and one BPF shared by the direct sampling module 201 and the at least one down conversion module 202.
  • the second LNA 305 and the first LNA 302 can be the same and one LNA shared by the direct sampling module 201 and the at least one down conversion module 202.
  • the fourth BPF 306 coupled to the second LNA 305 filters the high frequency band input signal received from the second LNA 305.
  • the fifth BPF 308 coupled to the mixer 307, filters the IF signal received from the mixer 307.
  • the fourth BPF 306 or the fifth BPF 308 can be the Surface Acoustic Wave (SAW) filter.
  • the amplifier 309 coupled to the fifth BPF 308, amplifies the IF signal
  • variable gain amplifier (VGA) 310 coupled to the amplifier 309,
  • the sixth BPF 311 coupled to the VGA 310, filters the IF signal received from the VGA 310, so as to avoid alias and avoid impacting the low frequency band input signal received from the direct sampling module 201.
  • the antenna A and antenna B can be the same and one antenna for receiving both the low frequency band input signal and high frequency band input signal.
  • Fig.4 illustrates a flowchart showing a method for receiving and processing different frequency band signals according to an exemplary embodiment of present invention.
  • the low frequency band input signal is received and processed by the direct sampling module 201.
  • the high frequency band input signal is received and processed by the at least one down conversion module 202.
  • the low frequency band input signal received from the direct sampling module 201 and the high frequency band input signal received from the at least one down conversion module 202 is combined by the combiner 203.
  • the analog signal received from the combiner is converted into the digital signal for further processing.
  • Fig.5 illustrates a flowchart showing a processing method performed by a direct sampling module according to an exemplary embodiment of present invention.
  • step S501 the low frequency band input signal is received and filtered by the first BPF 301.
  • step S502 the low frequency band input signal received from the first BPF 301 is amplified by the first LNA 302.
  • step S503 the low band frequency input signal received from the first LAN 302 is filtered by the second BPF 303, so as to avoid alias and avoid impacting the high band input signal received from the at least one single down conversion module.
  • Fig.6 illustrates a flowchart showing a processing method performed by at least one down conversion module according to an exemplary embodiment of present invention.
  • step S601 the high frequency band input signal is received and filtered by the third BPF 304.
  • step S602 the high frequency band input signal received from the third BPF 304 is amplified by the second LNA 305.
  • step S603 the high frequency band input signal received from the second LNA 305 is filtered by a fourth BPF 306.
  • step S604 the high band input signal received from the fourth BPF 306 is mixed with the signal from the local oscillator (LO) by the mixer 307, so as to produce
  • LO local oscillator
  • IF intermediate frequency
  • the IF signal received from the mixer 307 is filtered by the fifth BPF 308.
  • the IF signal received from the fifth BPF 308 is amplified by the amplifier 309.
  • the gain of the IF signal received from the amplifier 309 is compensated by the variable gain amplifier (VGA) 310.
  • the IF signal received from the VGA 310 is filtered by the sixth BPF 311, so as to avoid alias and avoid impacting the low frequency band input signal received from the direct sampling module.
  • Fig.7 illustrates signal characteristic analysis of multi-band receiver according to an exemplary embodiment of present invention.
  • an example of the multi-band receiver is the receiver in Base Station (BS)
  • the input signal includes two low frequency band input signal and one high frequency band signal.
  • ADC sample speed is 1.2 GHz
  • the high frequency band input signal is B7
  • the two low frequency band input signals are B12 and B14, respectively.
  • the below table 1 shows the uplink BS and downlink BS receiving frequencies of the three signals .
  • Fig.7 (a) illustrates the signal characteristic of the two low frequency band input signals B12, B14 and one high frequency band input signal B7 from the antenna.
  • the two low frequency band input signal are received and processed by the direct sampling module, and the high frequency band input signal are received and processed by the down conversion module.
  • Fig.7(b) illustrates the signal characteristics before the combination step by the combiner.
  • the frequency band of the signals B12 and B14 is not changed, and the frequency band of the signal B7 is down converted to 165 ⁇ 235 MHz.
  • Nyquist zone 1 is located below 600 MHz, and Nyquist zone 2 is located between 600 MHz to 1200 MHz.
  • Nyquist zone 1 and Nyquist zone 2 and accordingly there might be the alias of the interference signal A located in Nyquist zone 2 and the alias of the interference signal located in Nyquist zone 1.
  • the multi-band receiver according to the embodiments of the present invention can be easily implemented and can cover relatively wide

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
PCT/CN2012/081975 2012-09-26 2012-09-26 Multi-band receiver and signal processing method thereof Ceased WO2014047796A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201280076074.2A CN104798309A (zh) 2012-09-26 2012-09-26 多频带接收器及其信号处理方法
PCT/CN2012/081975 WO2014047796A1 (en) 2012-09-26 2012-09-26 Multi-band receiver and signal processing method thereof
EP12885511.1A EP2901558A4 (en) 2012-09-26 2012-09-26 Multi-band receiver and signal processing method therefor
IN913DEN2015 IN2015DN00913A (https=) 2012-09-26 2012-09-26
US14/430,609 US20150256207A1 (en) 2012-09-26 2012-09-26 Multi-band receiver and signal processing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/081975 WO2014047796A1 (en) 2012-09-26 2012-09-26 Multi-band receiver and signal processing method thereof

Publications (1)

Publication Number Publication Date
WO2014047796A1 true WO2014047796A1 (en) 2014-04-03

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PCT/CN2012/081975 Ceased WO2014047796A1 (en) 2012-09-26 2012-09-26 Multi-band receiver and signal processing method thereof

Country Status (5)

Country Link
US (1) US20150256207A1 (https=)
EP (1) EP2901558A4 (https=)
CN (1) CN104798309A (https=)
IN (1) IN2015DN00913A (https=)
WO (1) WO2014047796A1 (https=)

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CN105938376A (zh) * 2016-05-23 2016-09-14 四川蓉幸实业有限公司 一种枳壳烘干温度控制器用非线性运算放大信号处理电路
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Also Published As

Publication number Publication date
US20150256207A1 (en) 2015-09-10
CN104798309A (zh) 2015-07-22
EP2901558A4 (en) 2016-05-25
EP2901558A1 (en) 2015-08-05
IN2015DN00913A (https=) 2015-06-12

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