CN107872242A - A kind of multi-tap radio frequency interference canceller - Google Patents

A kind of multi-tap radio frequency interference canceller Download PDF

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Publication number
CN107872242A
CN107872242A CN201610850349.3A CN201610850349A CN107872242A CN 107872242 A CN107872242 A CN 107872242A CN 201610850349 A CN201610850349 A CN 201610850349A CN 107872242 A CN107872242 A CN 107872242A
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China
Prior art keywords
tap
radio frequency
interference
self
interference canceller
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CN201610850349.3A
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Chinese (zh)
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CN107872242B (en
Inventor
马猛
焦秉立
段晓辉
张丽媛
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A New Generation Of Information Technology Research Institute (peking University Tianjin)
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A New Generation Of Information Technology Research Institute (peking University Tianjin)
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    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)

Abstract

The present invention proposes tap system of selection and the implementation of a kind of multi-tap radio frequency interference canceller.Assuming that multi-tap radio frequency interference canceller has N number of delay tap, algorithm circulation n times.I-th (i ∈ [1, N]) is taken turns, and i-th of tap is in connection status, and other N i taps are in the state of isolation (or closing), obtain self-interference residual value.Then residual value corresponding to all taps is compared, obtains minimum value, selected tap corresponding to the minimum residual value to complete self-interference and eliminate, that is, keep the tap to be in connection status, other taps are all closed.Use multithrow switch so that taken turns in i-th (i ∈ [1, N]), only i-th of tap is in connection status, and other N i taps are completely in the state of closing, will not cause to leak because of the limitation of the isolation of electronic switch.Under the control of data signal, the flexible selection tap minimum with the main footpath delay error of channel, to eliminate self-interference.

Description

A kind of multi-tap radio frequency interference canceller
Technical field
The present invention relates to multi-tap radio frequency interference canceller circuit design and the realization of tap system of selection, and in particular to takes out The realization for the method that head eradicating efficacy optimizes, belongs to wireless communication field.
Background technology
It is also uncertain because whether the right-value optimization problem of current multi-tap wave filter belongs to convex optimization problem.For convex excellent Change problem, because it controls link, the analog- and digital- domain of observation links spans, tradition can not be used in the case of no calibration LMS or RLS algorithm；For non-convex optimization problem, it is necessary to find local best points interior on a large scale with relatively low precision first, Therefrom determine that globe optimum is nearby iterated calculating until convergence with high accuracy again.But the algorithm of both the above situation is answered Miscellaneous degree is all very high, and iteration time is longer.
The content of the invention
The delay line of multiple fixed delays is needed in the radio frequency interference canceller of more delay tap structures, is had to export The reference signal of different delays.The present invention proposes tap system of selection and the realization side of a kind of multi-tap radio frequency interference canceller Case.
The method design of the present invention is as follows：
Assuming that multi-tap radio frequency interference canceller has N number of delay tap, algorithm circulation n times.I-th (i ∈ [1, N]) is taken turns, and is made I-th of tap is in connection status, and other N-i tap is in the state of isolation (or closing), obtains self-interference residual value Ri。
Then residual value corresponding to all taps is compared, obtains minimum value,
Select tap corresponding to the minimum residual value to complete self-interference to eliminate, that is, keep the tap to be in connection status, its He closes in tap, RminAs final elimination is remaining.
The invention provides radio frequency self-interference to eliminate circuit design,
A variety of Peripheral Interfaces are provided with development board, FMC interfaces and the high collection of high-performance of processing radiofrequency signal are passed through by it Cheng Du radio frequency agile transceiver connection, completes modulus, the digital-to-analogue conversion of radiofrequency signal；
Control signal is wiredly connected to radio frequency interference canceller control section, control arrester work；Radio frequency agile is received and dispatched Connected between device and radio frequency self-interference arrester by SMA interfaces with coaxial cable.
Multi-tap radio frequency arrester composition device has shunt, microstrip line, attenuator, phase shifter, radio frequency electric switch, closes Road device etc., the branch of signal being realized respectively, being postponed, amplitude controls, phase controlling, break-make, the function such as combining.
The present invention propose a kind of circuit corresponding with the tap selection algorithm of above-mentioned multi-tap radio frequency interference canceller with Implementation.Characterized in that,
Use multithrow switch so that taken turns in i-th (i ∈ [1, N]), only i-th of tap is in connection status, other N-i Individual tap is completely in the state of closing, will not cause to leak because of the limitation of the isolation of electronic switch.In data signal Control under, the flexible selection tap minimum with the main footpath delay error of channel, to eliminate self-interference.
Advantages of the present invention：Method of the present invention, multi-tap self-interference arrester can be made to effectively eliminate interference, And algorithm execution time can be greatly shortened, while obtain ideal eradicating efficacy.
Brief description of the drawings
Fig. 1 radio frequencies self-interference eliminates circuit design figure.

Claims (3)

  1. A kind of 1. implementation of the tap system of selection of multi-tap radio frequency interference canceller, it is characterised in that
    Use multithrow switch so that taken turns in i-th (i ∈ [1, N]), only i-th of tap is in connection status, and other N-i are taken out Head is completely in the state of closing, will not cause to leak because of the limitation of the isolation of electronic switch.In the control of data signal Under system, the flexible selection tap minimum with the main footpath delay error of channel, to eliminate self-interference.
  2. 2. the tap system of selection of multi-tap radio frequency interference canceller as claimed in claim 1, it is characterised in that assuming that taking out more Head radio frequency interference canceller has N number of delay tap, algorithm circulation n times.I-th (i ∈ [1, N]) is taken turns, and i-th of tap is in connection State, other N-i tap are in the state of isolation (or closing), obtain self-interference residual value Rl。
    Then residual value corresponding to all taps is compared, obtains minimum value,
    <mrow> <msub> <mi>R</mi> <mi>min</mi> </msub> <mo>=</mo> <munder> <mrow> <mi>m</mi> <mi>i</mi> <mi>n</mi> </mrow> <mi>i</mi> </munder> <mo>{</mo> <msub> <mi>R</mi> <mi>i</mi> </msub> <mo>,</mo> <mi>i</mi> <mo>&amp;Element;</mo> <mo>&amp;lsqb;</mo> <mn>1</mn> <mo>,</mo> <mi>N</mi> <mo>&amp;rsqb;</mo> <mo>}</mo> </mrow>
    Select tap corresponding to the minimum residual value to complete self-interference to eliminate, that is, keep the tap to be in connection status, other are taken out Head is all closed, RminAs final elimination is remaining.
  3. 3. the implementation of the tap system of selection of multi-tap radio frequency interference canceller as claimed in claim 1, its feature exist In involved radio frequency self-interference is eliminated in circuit design, and a variety of Peripheral Interfaces are provided with development board, are passed through by it FMC interfaces are connected with handling the radio frequency agile transceiver of high-performance high integration of radiofrequency signal, complete radiofrequency signal modulus, Digital-to-analogue conversion；Control signal is wiredly connected to radio frequency interference canceller control section, control arrester work；Radio frequency agile is received and dispatched Connected between device and radio frequency self-interference arrester by SMA interfaces with coaxial cable.Multi-tap radio frequency arrester composition device has Shunt, microstrip line, attenuator, phase shifter, radio frequency electric switch, combiner etc., the branch of signal, delay, width are realized respectively The functions such as degree control, phase controlling, break-make, combining.
CN201610850349.3A 2016-09-27 2016-09-27 Multi-tap radio frequency interference eliminator Active CN107872242B (en)

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Application Number Priority Date Filing Date Title
CN201610850349.3A CN107872242B (en) 2016-09-27 2016-09-27 Multi-tap radio frequency interference eliminator

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Application Number Priority Date Filing Date Title
CN201610850349.3A CN107872242B (en) 2016-09-27 2016-09-27 Multi-tap radio frequency interference eliminator

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CN107872242A true CN107872242A (en) 2018-04-03
CN107872242B CN107872242B (en) 2020-04-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114024567A (en) * 2021-10-27 2022-02-08 中国电子科技集团公司第三十六研究所 Multi-tap delay circuit and design method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6293912B1 (en) * 1999-06-10 2001-09-25 B-K Medical A/S Ultrasound scanner with beam former
CN1574803A (en) * 2003-06-24 2005-02-02 三星电子株式会社 Equalization device and method for digital broadcast signal receiving system
CN101184069A (en) * 2007-12-14 2008-05-21 东南大学 Single carrier frequency domain equalization based selection feedback detecting method
CN101547021A (en) * 2008-03-28 2009-09-30 凌阳电通科技股份有限公司 Equalizing device and receiver using same
CN101826892A (en) * 2009-03-03 2010-09-08 冲电气工业株式会社 Echo cancelle
CN102315858A (en) * 2011-05-04 2012-01-11 苏州全波通信技术有限公司 Multiple-channel radio-frequency signal adaptation system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6293912B1 (en) * 1999-06-10 2001-09-25 B-K Medical A/S Ultrasound scanner with beam former
CN1574803A (en) * 2003-06-24 2005-02-02 三星电子株式会社 Equalization device and method for digital broadcast signal receiving system
CN101184069A (en) * 2007-12-14 2008-05-21 东南大学 Single carrier frequency domain equalization based selection feedback detecting method
CN101547021A (en) * 2008-03-28 2009-09-30 凌阳电通科技股份有限公司 Equalizing device and receiver using same
CN101826892A (en) * 2009-03-03 2010-09-08 冲电气工业株式会社 Echo cancelle
CN102315858A (en) * 2011-05-04 2012-01-11 苏州全波通信技术有限公司 Multiple-channel radio-frequency signal adaptation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114024567A (en) * 2021-10-27 2022-02-08 中国电子科技集团公司第三十六研究所 Multi-tap delay circuit and design method thereof
CN114024567B (en) * 2021-10-27 2023-05-09 中国电子科技集团公司第三十六研究所 Multi-tap delay circuit and design method thereof

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