Based on this outcome, we propose an equalization scheme performing joint carrier phase and polarization rotation recovery that can be applied to arbitrary two or fourdimensional signal. It degrades the accuracy of both code and carrier phase based measurements. This example demonstrates joint sampling rate and carrier frequency offset tracking in a wlan receiver. On the performance of joint iterative detection and decoding in. Photon polarization is the quantum mechanical description of the classical polarized sinusoidal plane electromagnetic wave. An improved multiplierfree feedforward carrier phase. In this report, a pilotaided algorithm for joint tracking of the phase and polarization has been proposed. Ce for joint phase noise and frequency offset estimation 27.
Jun 22, 2016 the spatially separated electromagnetic vector sensor array ssevsa has been widely used in passive radar directionfinding systems. For the joint phaseestimation comparison, the averaging blocklengths were 64 for the independent case and 16 for the joint case, further illustrated in. The msdd carrier phase estimation technique is derived here for optically coherent qpsk transmission, introducing the principle of operation while providing intuitive insight in terms of a multisymbol extension of naive delaydetection. Osa lowcomplexity and phase noise tolerant carrier phase. Joint doa and polarization estimation for unequal power sources. The algorithm uses a sequence of known symbols named pilot packet to estimate and compensate for phase noise and drift of the state of the polarization. Here, both dualfrequency pseudorange code observations melbournewubeena combination and ionospheric residual observations are used to detect cycle slips and gross errors. The om1106 optical modulation analysis oma software provides an ideal platform for research and testing of coherent optical systems. Signal processing, polarization and coherence researchgate, the. A method for estimating an antenna pointing error, comprising. In this study, we propose a joint doa and polarization estimation method for unequal power sources by utilizing the invariance property of. Joint doa and polarization estimation for unequal power. Finally, the efficiency of the algorithm is demonstrated by simulation experiments.
Efficient joint carrier frequency offset and phase noise. Joint doa and polarization estimation using a uca of singlepolarized antennas. The proposed algorithm for joint angle, delay and polarization estimation is based on a subspace approach taking advantage of the invariance properties of the spacetimepolarization manifold u along the esprit principle. Pilot quadrature phase shift keyin qpsk symbols are inserted into 16. That same 1% rule of thumb can illustrate how the carrier phase observable, that second observable, comes to our rescue, so to speak, with this little formula here. By combining qpsk partitioning, maximum likelihood ml detection and phase offset estimation between signals in different polarizations, simulation and experimental results for a 200gbs dp16qam system demonstrate similar linewidth tolerance to the best. Dgdimpaired transmission, together with agilent oma software that provides. Joint doa and polarization estimation using a uca of. A blind frequency and phase search algorithm for joint frequency and phase.
Consequently, the proposed scheme can simultaneously estimate frequency offset fo and phase. Only one calibrating source with known direction is requiblue to obtain the unique estimate. The algorithm dynamically recovers the carrier phase and state of polarization jointly for an arbitrary modulation format. Pilotaided jointchannel carrierphase estimation in space. Jointpolarization and jointsubchannel carrier phase estimation is realized by summing up. Simulation results show the effectiveness of the proposed algorithm. Joint polarization tracking and channel equalization based. Lowsnr limit of the cramerrao bound for estimating the. Carrier phase estimation in dispersionunmanaged optical.
However, sources with unequal powers apparently exist widely in actual applications. Program committee for the optical fiber communications ofc conference. Extended kalman filtering for joint mitigation of phase and amplitude. In this paper, we propose to use the unscented kalman filters ukf 2 to improve the estimation and tracking of polarization and phase in the system.
We derive here for the first time wieneroptimized and lmsadapted versions of msdd, introduce simplified hardware realizations, and. Joint polarization and joint subchannel carrier phase estimation for 16qam optical systems dv souto, be olsson, c larsson, daa mello journal of lightwave technology 30 20, 31853191. You collected carrier phase data for an hour with the highest quality, geodetic gps receiver and antenna, recording in the native gps coordinate system, and then differentially corrected against a base station with itrf00 coordinates. The authors gratefully acknowledge the support of the graduate program optika2.
An lp wave at some arbitrary orientation, say 45 from the vertical, can be resolved into an equivalent set of component waves having horizontal and vertical polarization. This feedforward, nondataaided, clockaided method is suitable for systems that use these types of baseband modulation. A jointpolarization ffcr mechanism for estimating the carrier phase noise based on samples from both polarizations is proposed and. For example for 16qam the modulation information cannot be removed by 4th power. Joint gmsk phase and timing synchronization algorithm.
From previous results we can see that powerful carrier phase estimation and decoding techniques shall be needed to combat the effects of both the laser phase noise and the frequency fluctuations. On the performance of joint iterative detection and. A lowcomplexity feedforward carrier phase estimation cpe technique is presented for dualpolarization dp16qam transmission systems. We derive here for the first time wieneroptimized and lmsadapted versions of msdd, introduce simplified hardware realizations, and evaluate complexity and. Introduction in a wlan radio a single oscillator is typically used to derive clocks for sampling and modulation. This paper proposes a simple threestage carrier phase estimation cpe algorithm for 16ary quadrature amplitude modulation 16qam optical coherent systems, based on a simplified quadrature phase shift keying partition qpskpartitioning scheme for the first stage and the maximum likelihood ml detection for the second and the third stage. Joint polarization tracking and channel equalization based on. The carrier signal, which has a much higher frequency than the pseudorandom code, is more accurate than using the pseudorandom code alone. Research article joint estimation of doa and polarization.
The tuning parameter q is adaptively adjusted according to the innovation vector under dynamic operating condition. In this paper, a joint polarization tracking and channel equalization scheme based on kalman filtering is proposed and demonstrated experimentally in polarization division multiplexing 16 quadrature amplitude modulation system pdm16qam signals for the first time to the best of our knowledge. It is found that, vv cpe method outperforms the ot. Wen dong, ming diao, and limin guo abstractin this paper, the direction of arrival doa and polarization parameters are estimated by a uniform circular array uca with several singlepolarized sensors. The technology includes software defined radio, longterm evolution, and blind synchronization and parameter. Multiformat carrier recovery for coherent realtime. Joint doa and polarization estimation using a uca of singlepolarized antennas wen dong, ming diao, and limin guo abstractin this paper, the direction of arrival doa and polarization parameters are estimated by a uniform circular array uca with several singlepolarized sensors. The performance of pilotaided joint channel carrier phase estimation cpe in spacedivision multiplexed multicore fiber mcf transmission with correlated phase noise is studied. Modulation format independent joint polarization and phase. Channel estimation, equalization and phase correction for single carrier underwater acoustic communications jun tao y. A joint compensation scheme based on pilot symbols aiding adaptive kalman filter akf for phase noise and polarization crosstalk is proposed and. This is a joint scheme and can be used for polarization tracking and carrier. We also compare the performance of the scattering estimation achieved by joint transmitterreceiver optimization with the cases when there is optimization at either the transmitter or receiver only. Matlab code for estimating gnss satellite and receiver.
In the first stage, a feedforward cpe is implemented to make an initial carrier phase estimation of a training sequence. Joint carrier phase and frequencyoffset estimation with. Noise adaptive kalman filter for joint polarization tracking and channel equalization using cascaded covariance matching. The amplitude and phase of a gps signal changes when it is reflected depending upon the reflecting material property and incidence angle. Analog signal processing systems and methods manage polarization in coherent optical receivers to eliminate the need for ultrafast, powerhungry adcs and dsps and that require digitization of the fullbandwidth signal path and result in bulky and expensive circuit designs. A joint directionofarrival doa and polarization estimation method based on multi polarization sensitive circle array and joint spectrum in polarization and spatial domains has been investigated. You then exported the data to without any transformation or differential correction. Study of physical layer impairments in high speed optical. It can filter a beam of light of undefined or mixed polarization into a beam of welldefined polarization, that is polarized light. Viterbi, nonlinear estimation of pskmodulated carrier phase. Joint estimation of doa and polarization based on phase difference analysis of electromagnetic vector sensor array article in multidimensional systems and signal processing 2911 june 2016. Frequency offset estimation using a kalman filter in coherent optical phase shift keying systems. Jan 15, 2018 we propose a joint polarization tracking and channel equalization scheme based on radiusdirected linear kalman filter rdlkf by introducing the butterfly finiteimpulseresponse fir filter in our previously proposed rdlkf method. Highaccuracy and lowcomplexity techniques by yizheng liao a thesis submitted to the faculty of the worcester polytechnic institute in partial ful.
For most joint direction of arrival doa and polarization estimation methods, the performances of proposed methods in dealing with unequal power sources are not discussed. It is a complete software package for acquiring, demodulating, analyzing, and visualizing complex modulated systems from an easyto. R joint transmitter and receiver polarization optimization. An individual photon can be described as having right or left circular polarization, or a superposition of the two. Synchronization and multipath delay estimation algorithms. A pilot symbols aided adaptive kalman filter for joint carrier phase. Extended kalman filter for carrier frequency offset and carrier phase noise. Gps position estimation using integer ambiguity free carrier. By combining qpsk partitioning, maximum likelihood ml detection and phase offset estimation between signals in different polarizations, simulation and experimental results for a 200gbs dp16qam. Joint angledelaypolarization estimation by espritlike.
Tacota program prime contract w911qxo6c0101 via a subcontract from celight, inc. Joint estimation of doa and polarization based on phase. Osa carrier phase estimation for optically coherent qpsk. In the case of pilotaided estimation, the pilots are distributed over a twodimensional channeltime symbol block that is transmitted through multiple channels. This algorithm converges iteratively to the ml estimate provided that the initial estimate is sufficiently accurate 12. Jointpolarization carrier phase estimation for psqpsk. Crossreference to related applications 0001 the present application is a continuation of u. Research article joint estimation of doa and polarization with cld pair cylindrical array based on quaternion model guibaowang, 1 haihongtao, 1 lanmeiwang, 2 andcaozeng 1 national laboratory of radar signal processing, xidian university, xi an, china.
Modulation format independent joint polarization and phase tracking for coherent receivers cristian b. Our work in visionbased sensing is a novel fusion of gps carrier phase measurements with camera images at the level of the socalled bundle adjustment process that is central to robust visual simultaneous localization and mapping slam. Optical networking with variablecoderate transceivers. A joint frequency and timing offset estimation for minimumshift keying msk is presented in 27, where the msk. Jointchannel carrierphase estimation can improve the performance of multichannel optical communication systems. An analysis of carrier phase jitter in an mpsk receiver. Phasecoherent lightwave communications with frequency. The closeform description for estimating carrier phase in these carrier phase estimation approaches are analyzed, and the ber performance in these cpe approaches is also studied in detail using different modulation formats. Carrier phase and frequency estimation for pilotsymbol. Us82957b2 dual stage carrier phase estimation in a. Digital coherent receivers and advanced optical modulation. On the performance of joint iterative detection and decoding. Osa lowcomplexity and phase noise tolerant carrier. Carrier phase is another processing technique that gathers data via a carrier phase receiver, which uses the radio signal aka carrier signal to calculate positions.
A lowcomplexity feedforward carrier phase estimation cpe technique is presented for dual polarization dp16qam transmission systems. In future work, our technique will attempt joint visual slam and carrier integer ambiguity resolution. It is based on maximumlikelihood arguments and has a feed forward structure. An adaptive and joint carrier recovery scheme is proposed based on adaptive kalman filter akf for 16 quadrature amplitude modulation signals. This work has been supported by the national natural science foundation of china no. After passing through the rain,the horizontal component has suffered a greater decreased in amplitude, so the polarization direction has. To compensate these impairments, in next section we propose the use of a joint iterative detection and decoding technique. The role of an observables block is to collect the synchronization data coming from all the processing channels, and to compute from them the gnss basic measurements. A polarizer or polariser is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations. Pdf joint scheme of dynamic polarization demultiplexing and. Czegledi, erik agrell, senior member, ieee, magnus karlsson, senior member, ieee, fellow, osa, and pontus johannisson, member, osa abstractthe state of polarization and the carrier phase drift dynamically during transmission in a random.
Pilotaided joint phase and polarization tracking algorithm. Channel estimation, equalization and phase correction for. An analysis of carrier phase jitter in an mpsk receiver utilizing map estimation william osborne and brian kopp new mexico state university, las cruces, new mexico abstract the use of 8 and 16 psk tcm to support satellite communications in an effort to achieve more bandwidth efficiency in a powerlimited channel has been proposed. Frequency offset estimation using a kalman filter in. Joint compensation of iq imbalance and phase noise based. However, when the directional angles of array elements are different, this changes law of the phase difference between the array elements. Institutional open access program ioap sciforum preprints scilit sciprofiles. At low snr the nondataaided frequency estimators from 6, sec. In this paper, an explicit theoretical analysis of the characteristics of the phase difference between any two array. The proposed algorithm is also suitable for linear software. Psiaki cornell university biography shan mohiuddin is a graduate student in mechanical and aerospace engineering.
Om1106 optical modulation analysis software, datasheet. A joint polarization ffcr mechanism for estimating the carrier phase noise based on samples from both polarizations is proposed and compared with three other plausible alternatives. A simple threestage carrier phase estimation algorithm for. We propose a joint estimation scheme for fast, accurate, and robust frequency offset fo estimation along with phase estimation based on modified adaptive kalman filter makf. Joint sampling rate and carrier frequency offset tracking. This paper presents a joint maximumlikelihood estimation of carrier frequency phase and data in a wireless communication system where channel frequency phase uncertainty is present due to high doppler shift and the data is convolutional encoded and modulated by quadrature phase shift keying qpsk. Joint doa and polarization estimation based on multi. In parallel to introduction to the advanced modulation formats in fiber optic communications high speed digital signal processors dsps made digital. It estimates the array gain phase and mutual coupling coefficients with a set of simultaneous equations formed by using the beam pattern property of the array. The cpm phase recovery block recovers the carrier phase of the input signal using the 2ppower method. Filtered carrier phase estimator for highorder qam optical systems valery rozental, deming kong, member. Although the joint polarization and phase tracking scheme can be employed for compensating the polarization mode dispersion, it is difficult to deal with other isi impairments simultaneously.
We verify that the proposed algorithm is more tolerant to phase mismatches than earlier work. Adaptive and joint frequency offset and carrier phase. The vulnerable sensitivity to laser linewidth induced inter carrier interference ici has long been recognized as a major problem to coherent optical orthogonal frequencydivision multiplexing coofdm systems. Block diagram of the carrier phase estimation algorithm. Matlab toolbox for simulating singledual frequency gps and carrier phase differential gps sauravaggpsmatlab. Joint doa and polarization estimation using a uca of single. Single dpll joint carrier phase compensation for fewmode. A system and method implementing dual stage carrier phase estimation cpe in a coherent receiver for an optical fiber communication system. A technique for determining the carrier phase differences between independent gps receivers during scintillation shan mohiuddin, todd e. Comparative analysis of dp qpsk and dp 16qam optical. We present dual polarization complexweighted, decisionaided, maximumlikelihood algorithm with superscalar parallelization sspdpcwdaml for joint carrier phase and frequencyoffset estimation foe in coherent optical receivers. The jadpe method exploits the principle discussed by compton in 7 for a separate angle and polarization estimation and the.
They significantly degrade the performance of the carrier phase estimator in high speed. We shall focus on the structural and algorithmic level rather than the implementation level, where the finite resources, such. The received optical signal eint is combined with a lo laser using two 90. Design of a 1 tbs superchannel coherent receiver mitsubishi. Gps signal is right hand circular polarization and the polarization may change from right hand to left when the signal is reflected. Estimating an antenna pointing error by determining polarization. An ukf can give estimates accurate up to 3rd order under taylor series expansion of their moments 2 and can be upgraded to higher modulation formats without drastic changes in implementations.
It is possible to perform joint carrier phase and symbol synchronization 31. An iterativebased method for joint gain phase and mutual coupling array calibration is proposed in this paper. A technique for determining the carrier phase differences. We evaluated each architecture using monte carlo simulations and observed that the joint polarization ffcr yields a 1. Joint gainphase and mutual coupling array calibration. The digital signal processing computational complexity is reduced in comparison to a traditional cpe stage. Filtered carrier phase estimator for highorder qam. They significantly degrade the performance of the carrier phase estimator in highspeed. Recently, a joint tracking and equalization scheme for multipolarization effects is proposed 12. Efficient joint carrier frequency offset and phase noise compensation scheme for highspeed coherent optical ofdm systems abstract. A new non dataaided nda and alldigital algorithm is proposed for join estimation of timing and carrier phase in gmsk modulation. In general, the phase tracking is performed independently of the sop tracking, using algorithms such as the viterbiviterbi algorithm 10 or the blind phasesearch algorithm bps 11, which treat each polarization. By searching half of the fourdimensional space, a joint estimation of the direction of arrival and polarization of the incident signal is obtained, which can effectively reduce the computational complexity of the joint estimation of the fourdimensional space.
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