WO2006089875A1 - Procede et dispositif de synchronisation de liaisons rectilignes ou quasi-rectilignes en presence d'interferences - Google Patents
Procede et dispositif de synchronisation de liaisons rectilignes ou quasi-rectilignes en presence d'interferences Download PDFInfo
- Publication number
- WO2006089875A1 WO2006089875A1 PCT/EP2006/060102 EP2006060102W WO2006089875A1 WO 2006089875 A1 WO2006089875 A1 WO 2006089875A1 EP 2006060102 W EP2006060102 W EP 2006060102W WO 2006089875 A1 WO2006089875 A1 WO 2006089875A1
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- WO
- WIPO (PCT)
- Prior art keywords
- signal
- interference
- vector
- rectilinear
- cncir
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
- H04L7/042—Detectors therefor, e.g. correlators, state machines
Definitions
- the invention particularly relates to a method and a device for synchronizing a rectilinear or quasi-rectilinear link in the presence of interference of the same nature, from one or more receiving antennas.
- rectilinear link denotes a link for which the transmitted signal is rectilinear, that is to say that it has a real complex envelope, or a mono-dimensional modulation, as is the case for amplitude modulation (AM) signals, Amplitude Shift Keying (ASK) or BPSK binary phase shift keying signals.
- a link is said to be quasi-rectilinear if the transmitted signal is quasi-rectilinear, that is to say if the real part of its complex envelope contains all the information conveyed by this signal.
- the quasi-rectilinear signals mention may in particular be made of MSK or GMSK signals having undergone a derotation pretreatment.
- the invention finds particular application in systems using rectilinear modulations, or rendered quasi-rectilinear after pre-processing, such as some enemy-friend identification systems or IFF (Identification Friend Foe modes S and 5) or some networks (cellular or not) radiocommunications such as the network for GSM (Global System for Mobile Communications), for which the main source of interference is the network itself.
- IFF Identification Friend Foe modes S and 5
- networks cellular or not radiocommunications
- GSM Global System for Mobile Communications
- the object of the invention relates in particular to a method and a device for synchronizing a rectilinear link or made quasi-rectilinear after pre-processing, exploiting the potentially non-circular nature of the interference and particularly powerful for interference, said internal, they - even rectilinear or quasi-rectilinear after pre-treatment.
- LSL filtering is a joint linear filtering of complex observations and complex observations [7].
- the method comprises, for example the following steps:
- the method for two-state CPM signals, comprises a step of preprocessing derotation of the observations received in order, in particular, to render the signal quasi-rectilinear.
- the decision criterion is for example obtained as follows:
- the device comprises, for example an array of virtual sensors (N + 1 to 2N), a filter (1), a signal correlation device from the filter and the training sequence, a decision device receiving the correlated signal.
- It may also include a device adapted to transform a 2-state CPM signal into a quasi-rectilinear signal.
- the method and the device are used for example for the synchronization of a mono-dimensional modulation signal: ASK, BPSK ... or that of a CPM signal to
- the invention notably has the advantages of reducing, at constant performance, the number of sensors in reception and also makes it possible to envisage synchronization from a single antenna in the presence of interference.
- FIG. 1 is a block diagram of the synchronization device according to the invention, • Figure 2 examples of configugration for optimal synchronization in the presence of a BPSK interference,
- FIG. 1 represents a block diagram of an exemplary device according to the invention in the case of a BPSK modulation comprising: an array of N sensors referenced 1 to N in the figure, N reception channels, a virtual network of referenced sensors; N + 1 to 2N in the figure, a filter 1, a means 2 for correlating a reference signal with the signal from the filter, a decision device 3 (detection / synchronization).
- the filter 1 is for example a Wiener LSL filter and its function is in particular the rejection of interference and the rejection of decorrelated paths.
- the decision device 3 is adapted to calculate the sufficient statistics and to make a comparison of this statistic with a fixed threshold. These mechanisms are described below.
- T e is the sampling period
- bjikT e is the sampled total noise vector, uncorrelated to the useful source
- h s is the vector of the impulse responses of the channels associated with the wanted signal
- l o is the delay of propagation of the useful signal, assumed equal to a multiple of T e to simplify
- s (t) is the complex envelope of the useful signal BPSK given by:
- s (t) ⁇ s ⁇ a n v (t - nT) (2) n
- v (t) is the raised cosine shaping filter ( 1 A Nyquist filter)
- ⁇ s is a real value controlling the instantaneous power of s (t) .
- model (1) assumes non-time-spreading propagation channels, which occurs, for example, for free space propagation (satellite communications, airborne radio communications) or flat fading or fading channels (certain situations radio communications in urban areas).
- h s - e ⁇ s where ⁇ s and s respectively correspond to the phase and the direction vector of the useful signal.
- the method developed in this document also applies to temporally spread channels.
- the useful part of (1) corresponds in fact to the contribution of a path or mode of propagation.
- the other paths are in the total noise vector.
- R (Jc) -E [b ⁇ (kT e ) b ⁇ (kT e y) and C (k) -E [b ⁇ (kT e ) b ⁇ (kT e )] are respectively the first and second correlation matrices of the noise vector b ⁇ (kT e ), ⁇ s (k) - E [ ⁇ s (kT e ) ⁇ ] is the instantaneous power of the useful signal received by an omnidirectional sensor for space propagation Free Formulation of the problem
- training sequences are generally transmitted periodically for synchronization purposes, which means in particular that the useful signal s (kT e ) is known over time intervals K symbols, where pK is the number samples of the training sequence.
- the problem of optimal synchronization is to find the best estimate, l o s o from the vectors observations x (kT e) and knowing the useful signal s (kT e ) for 0 ⁇ k ⁇ pK - 1.
- the optimal strategy of detection of the useful signal s (kT e ) from observations x ((k + l o ) T e ) over the duration of the training sequence consists in comparing with a threshold, the likelihood ratio (RV), L (x) (l o ), defined by:
- the idea of the invention consists in particular in exploiting the noncircular character of the order 2 of the interference while keeping the assumption of Gaussian total noise and that of stationary of the total noise, while keeping only a sample of total noise. per symbol over the duration of the sequence.
- B ⁇ ((Vp + n) T) is the vector (2JVx 1) defined by B ⁇ ((Vp + n) T) ⁇ [b ⁇ ((Vp + n) T) ⁇ , b ⁇ i (Vp + «) ⁇ T > and where RB (I O ) is the matrix (2JVx 2N) defined by:
- X ((lolp + n) T) and H s (extended propagation channel vector) are respectively defined by X ((l o lp + n) T) ⁇ [x ((l o lp + n) T) ⁇ , x ((l o lp + n) T) ⁇ and H s ⁇ [h s , h s ] ].
- the quantities H s and RQ (I O ) are assumed to be unknown and must be replaced in (9) by their maximum likelihood estimate.
- the synchronization method for rectilinear signals comprises for example the following steps:
- CNCIR-LR (O, defined by (10) where l o has been replaced by /, takes the following form:
- the sufficient CNCIR-LR statistic (O corresponds, to the normalization factor, to the result of the correlation between the training sequence and the output of the LSL spatial filter W (I), as illustrated in FIG. 1.
- the sequence s (nT) is weakly correlated with the observation vector X ((llp + n) T), the vector W (I) is not very far from the vector null and the function CNCIR-LR (O approaches zero to the noise of variance close due to the finite duration of the training sequence.
- the sequence s (nT) is perfectly correlated with the useful part of the observation vector X ((1 / p + ⁇ ) T) given, under H1, by:
- this FAS LSL also corresponds to the conventional FAS but for a virtual network with 2N sensors receiving a useful signal whose channel vector is H s and a total observed vector noise Bj ⁇ (I 0 Ip + ⁇ ) T) at the time (I 0 Ip + n) T.
- the noise vector bj ⁇ lo / p + ⁇ ) T) takes the form: b ⁇ i (l o / p + n) T) ⁇ j ⁇ ((l o lp + ⁇ ) T) h ⁇ + b ((l o lp + ⁇ ) T) (18)
- ⁇ 2 is the average power of the background noise per sensor
- I is the identity matrix (Nx N)
- ⁇ ⁇ (k) - E [ ⁇ j ⁇ (kT e ) ⁇ ] is the power of the interference received by a omnidirectional sensor for free space propagation.
- the spatial correlation coefficient, OCi ⁇ v 5 between the interference and the signal useful for the virtual network of 2N sensors, defined by the standardized scalar product of the vectors H s and H ⁇ , and such that 0 ⁇ l ⁇ i ⁇ vl ⁇ 1, is given by:
- ⁇ is the phase of h s * h ⁇ and where a ⁇ s , such that 0 ⁇
- [SINR] nC (Z 0 ) 2 ⁇ -s [1 - - 2 ⁇ -
- 1), which occurs in particular for a single-sensor reception. Under these conditions, for a strong interference ( ⁇ i >> 1), the expression (24) takes the form:
- FIG. 3 illustrates the operation of the LSL FAS in the presence of a strong BPSK interference, which compensates for the phase of the interference and shifts the latter by ⁇ / 2 so as to minimize the contribution of the interference. on the real part axis.
- the method according to the invention applies in particular to the GMSK modulation belonging to the family of continuous phase modulation (CPM) modulations. It is shown in [6] that the GMSK modulation can be approximated by a linear modulation, generating the approximate useful complex envelope:
- b n ⁇ ⁇ are random variables iid corresponding to the symbols transmitted if they are coded differentially in the exact form of the modulation, T is the symbol and fit duration) is the real-valued formatting filter that corresponds to either the main source in Laurent's decomposition or the best least-squared source, for example.
- the derotation operation consists in multiplying the sample, s (nT), of s (t) by j ⁇ n , generating the derailed sampled signal, sd (nT), defined by:
- sd (nT) at J- ⁇ S (T 1 T) ⁇ ⁇ s ⁇ i m - n b m Mn - m) T) at ⁇ s ⁇ b m f d ((n - m) T) (27) mm wherefd (t) - j fit) is the equivalent shaping filter of the linearized and derated GMSK signal.
- sd (nT) has the form of a BPSK signal sampled at the symbol rate but with two differences from the BPSK. The first is that fd (t) is not a 1 A Nyquist filter and intersymbol interference (IES) occurs after a filtering operation adapted to the filter). The second resides in the fact that fd (t) is no longer a real valued function but becomes a function with complex values.
- Extended observation vector To simplify the analysis, consider a useful signal and interference
- An LSL ST filter with L coefficients per filter generates, at the instant of synchronization / o r e , the output y ((lolp + n) T) defined by:
- Step 1 Derotation of observations and construction of spatio-temporal observation vectors (2LN x 1) Xd, st (( ⁇ / P + n) T), 0 ⁇ n ⁇ K-1
- Step 2 Estimation of r ⁇ d > s t, s0) and R Xd, s ⁇ J)
- ⁇ of all sources of interference at the output of the filter W s t (lo) is not necessarily necessary for synchronization.
- Optimal LSL ST filters may also be advantageous for synchronizing BPSK signals especially when the propagation delay is not a multiple of the sampling period.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Noise Elimination (AREA)
- Radar Systems Or Details Thereof (AREA)
- Mobile Radio Communication Systems (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007555631A JP5103670B2 (ja) | 2005-02-22 | 2006-02-20 | 干渉が存在する状況で直線または準直線リンクを同期化させる方法および装置 |
CA2596905A CA2596905C (fr) | 2005-02-22 | 2006-02-20 | Procede et dispositif de synchronisation de liaisons rectilignes ou quasi-rectilignes en presence d'interferences |
EP06708385A EP1854226B1 (fr) | 2005-02-22 | 2006-02-20 | Procede et dispositif de synchronisation de liaisons rectilignes ou quasi-rectilignes en presence d'interferences |
BRPI0607901-6A BRPI0607901A2 (pt) | 2005-02-22 | 2006-02-20 | método e dispositivo para sincronização de enlaces retilìneos ou quase retilìneos na presença de interferência |
US11/816,906 US7940856B2 (en) | 2005-02-22 | 2006-02-20 | Method and device for synchronizing rectilinear or quasi-rectilinear links in the presence of interference |
CN200680005739.5A CN101128996B (zh) | 2005-02-22 | 2006-02-20 | 用于在存在干扰时对直线或准直线链接进行同步的方法和装置 |
Applications Claiming Priority (2)
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FR0501784A FR2882479B1 (fr) | 2005-02-22 | 2005-02-22 | Procede et dispositif de synchronisation de liaisons rectilignes ou quasi-rectilignes en presence d'interferences |
FR0501784 | 2005-02-22 |
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WO2006089875A1 true WO2006089875A1 (fr) | 2006-08-31 |
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PCT/EP2006/060102 WO2006089875A1 (fr) | 2005-02-22 | 2006-02-20 | Procede et dispositif de synchronisation de liaisons rectilignes ou quasi-rectilignes en presence d'interferences |
Country Status (9)
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US (1) | US7940856B2 (fr) |
EP (1) | EP1854226B1 (fr) |
JP (1) | JP5103670B2 (fr) |
KR (1) | KR101208388B1 (fr) |
CN (1) | CN101128996B (fr) |
BR (1) | BRPI0607901A2 (fr) |
CA (1) | CA2596905C (fr) |
FR (1) | FR2882479B1 (fr) |
WO (1) | WO2006089875A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2919931A1 (fr) | 2007-08-08 | 2009-02-13 | Thales Sa | Procede et dispositif pour determiner la reponse impulsionnelle de canaux de propagation impliquant des emetteurs, des reflecteurs et des capteurs fixes ou mobiles |
CN102439868B (zh) | 2009-03-16 | 2014-09-17 | 华为技术有限公司 | 一种数据传输方法、通讯系统以及相关设备 |
US8320441B2 (en) * | 2010-09-24 | 2012-11-27 | Harris Corporation | Efficient high performance demodulation of low BT value gaussian minimum shift keying incorporating turbo equalization |
US8731027B2 (en) | 2011-12-05 | 2014-05-20 | Battelle Energy Alliance, Llc | Methods and apparatuses using filter banks for multi-carrier spread-spectrum signals |
JP5686920B1 (ja) * | 2014-07-02 | 2015-03-18 | 眞吉 西本 | アレイアンテナビーム幅内の量子化多重・狭ビーム形成方法、アレイアンテナビーム幅内の量子化多重・狭ビーム形成装置およびレーダシステム |
US10581481B1 (en) | 2018-09-18 | 2020-03-03 | Battelle Energy Alliance, Llc | Communication device, spread-spectrum receiver, and related method using normalized matched filter for improving signal-to-noise ratio in harsh environments |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0665665A1 (fr) * | 1994-01-21 | 1995-08-02 | Thomson-Csf | Procédé et dispositif permettant à un modem de se synchroniser sur un transmetteur de données numériques par voie hertzienne en présence de brouilleurs |
EP1359685A1 (fr) * | 2002-05-03 | 2003-11-05 | Thales | Séparation des sources pour des signaux cyclostationnaires |
Family Cites Families (7)
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US6335954B1 (en) * | 1996-12-27 | 2002-01-01 | Ericsson Inc. | Method and apparatus for joint synchronization of multiple receive channels |
US6351498B1 (en) * | 1997-11-20 | 2002-02-26 | Ntt Mobile Communications Network Inc. | Robust digital modulation and demodulation scheme for radio communications involving fading |
KR100491905B1 (ko) * | 1999-11-08 | 2005-05-27 | 산요덴키가부시키가이샤 | 무선 수신 시스템 및 동기 검출 방법 |
BRPI0101198B1 (pt) * | 2001-03-02 | 2015-09-01 | Unicamp | Processo concorrente para desconvolução autodidata de sinais digitais |
FR2853480B1 (fr) * | 2003-04-01 | 2005-06-17 | Procede et dispositif d'identification autodidacte d'un melange sous-determine de sources au quatrieme ordre | |
FR2862173B1 (fr) * | 2003-11-07 | 2006-01-06 | Thales Sa | Procede de demodulation aveugle aux ordres superieurs d'un emetteur de forme d'onde lineaire |
JP3775604B2 (ja) * | 2004-05-27 | 2006-05-17 | 国立大学法人 北海道大学 | 同期検出装置および無線装置 |
-
2005
- 2005-02-22 FR FR0501784A patent/FR2882479B1/fr not_active Expired - Fee Related
-
2006
- 2006-02-20 US US11/816,906 patent/US7940856B2/en not_active Expired - Fee Related
- 2006-02-20 CN CN200680005739.5A patent/CN101128996B/zh not_active Expired - Fee Related
- 2006-02-20 BR BRPI0607901-6A patent/BRPI0607901A2/pt not_active IP Right Cessation
- 2006-02-20 WO PCT/EP2006/060102 patent/WO2006089875A1/fr active Application Filing
- 2006-02-20 KR KR1020077019132A patent/KR101208388B1/ko not_active IP Right Cessation
- 2006-02-20 EP EP06708385A patent/EP1854226B1/fr not_active Not-in-force
- 2006-02-20 JP JP2007555631A patent/JP5103670B2/ja not_active Expired - Fee Related
- 2006-02-20 CA CA2596905A patent/CA2596905C/fr not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0665665A1 (fr) * | 1994-01-21 | 1995-08-02 | Thomson-Csf | Procédé et dispositif permettant à un modem de se synchroniser sur un transmetteur de données numériques par voie hertzienne en présence de brouilleurs |
EP1359685A1 (fr) * | 2002-05-03 | 2003-11-05 | Thales | Séparation des sources pour des signaux cyclostationnaires |
Non-Patent Citations (1)
Title |
---|
PICINBONO B ET AL: "WIDELY LINEAR ESTIMATION WITH COMPLEX DATA", IEEE TRANSACTIONS ON SIGNAL PROCESSING, IEEE, INC. NEW YORK, US, vol. 43, no. 8, 1 August 1995 (1995-08-01), pages 2030 - 2033, XP000526122, ISSN: 1053-587X * |
Also Published As
Publication number | Publication date |
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JP2008532356A (ja) | 2008-08-14 |
FR2882479B1 (fr) | 2007-04-20 |
US7940856B2 (en) | 2011-05-10 |
FR2882479A1 (fr) | 2006-08-25 |
CA2596905C (fr) | 2014-06-03 |
JP5103670B2 (ja) | 2012-12-19 |
CN101128996B (zh) | 2014-12-31 |
CN101128996A (zh) | 2008-02-20 |
EP1854226B1 (fr) | 2012-07-11 |
EP1854226A1 (fr) | 2007-11-14 |
CA2596905A1 (fr) | 2006-08-31 |
US20080226003A1 (en) | 2008-09-18 |
KR101208388B1 (ko) | 2012-12-05 |
KR20070106011A (ko) | 2007-10-31 |
BRPI0607901A2 (pt) | 2009-10-20 |
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