Ssmi cancellation in directdetection optical ofdm with novel halfcycled ofdm. Spectrum of 4 qam coofdm in order to improve the performance of coherent ofdm system, the receiver structure is made. The normalization operation amplifies the clipped data signal to the maximum input amplitude of a digital. Directdetection optical ofdm oluyemi omomukuyo and j. Pdf ofdm systems for optical communication with intensity. We show by simulation the impact variations in both the bias point of a machzehnder modulator and the amplitude of the driving signal has on the receiver sensitivity of a directdetection optical ofdm system with 4qam modulation. In this context, optical ofdm o ofdm is regarded as a promising candidate. Optical orthogonal frequency division systems with direct detection receivers abstract the new generation of pasive optical networks pons to cover the lastmile to the user, is today a hot topic of research. Ofdm based on offset qam ofdm oqam for short has attracted increasing attention in optical communications recently1234, and has been applied in both coherent and direct detection optical communication systems5678 9.
Improved direct detection optical ofdm system it is clear from fig. The null bias point for coofdm upconversion signifies a fundamental difference between the optical intensity modulation and the optical field modulation. Intensity modulation and direct detection imdd is a costeffective optical communication strategy which finds wide applications in fiber. From the many architectures being proposed for o ofdm, the use of direct detection is particularly interesting for the downlink of passive optical networks as costefficient optical network units onus are required. Direct data detection of ofdm signals over wireless. A papr reduction technique based on a constant envelope ofdm. Singlesideband ssb directdetection optical orthogonal frequency division multiplexing ofdm transmission is experimentally demonstrated in a system with 125 km. Orthogonal frequency division multiplexing ofdm is widely adopted in several wired and. The system, which employs an optical comb source at the transmitter, is shown to support both spectrally efficient ssbofdm and high bit rate ddoofdm.
Peng, direct detection optical ofdm, in optical fiber communication conference, osa technical digest online optical society of america, 2014, paper th3k. Pdf comparison of different modulation techniques for. H0 in 28 can be removed by averaging ps over the pdf of hi. Performance analysis of unidirectional wdm ofdm pon systems with direct and coherent detection methods written by vidya k. In direct detection system a single photodiode is used, while in coherent detection the principle of optical mixing is utilized with local oscillator. Spectrum of 4 qam co ofdm in order to improve the performance of coherent ofdm system, the receiver structure is made. Ssmi cancellation in directdetection optical ofdm with. Direct detection optical ofdm system finds applications in inexpensive short haul communication as there lesser number of components at transmitter and is receiver side as compared to coherent optical ofdm. Shami, senior member, ieee abstract this paper presents a novel ef.
A performance analysis was conducted to compare the performance of direct detection and coherent detection schemes in terms of their ber, dispersion tolerance and q factor. Theoretical and experimental investigation of compatible. In this paper, we experimentally demonstrate a 100 gbits opticalofdm system using. Theoretical and experimental investigation of direct. Orthogonal frequency division multiplexing ofdm modulation a mapping of the information on changes in the carrier phase, frequency or amplitude or combination. Kahn, fellow, ieee abstractwe discuss the use of orthogonal frequencydivision multiplexing ofdm for combating groupvelocity dispersion gvd effects in ampli. Comparison of orthogonal frequencydivision multiplexing and onoff keying in directdetection multimode fiber links daniel j. This digital data is analog modulated by qam coder. Optical orthogonal frequency division systems with direct.
Orthogonal frequency division multiplexing ofdm has been an important candidate in wireless communication since many years. Such systems also have the important advantage of very narrow channel spacing in optical frequencydivision multiplexing ofdm systems. A data clipping and normalization technique is employed to improve the performance of the overall direct detection optical orthogonal frequency division multiplexing dcoofdm system. In this paper, a novel energy and spectrally efficient scheme called asymmetrically clipped absolute value optical ofdm aaoofdm is proposed for intensitymodulated directdetection systems. Enabling high capacity directdetection optical ofdm. The system uses a traditional dualdrive mzm transmitter and a directdetection receiver. Osa a papr reduction technique based on a constant. Performance analysis of unidirectional wdmofdmpon systems with direct and coherent detection methods written by vidya k. D3 outperforms the coherent detector substantially, particularly at high snrs with. Singlesideband orthogonal frequency division multiplexing ssbofdm with direct detection is a. Reconfigurable wdmofdmpon employing wavelength selective.
Highspeed transmission by directdetection optical ofdm. Nov 29, 20 we propose and experimentally demonstrate a 37. Communications with direct detection for metro networks. Orthogonal frequency division multiplexing ofdm is widely adopted in. Djordjevic et al ldpccoded ofdm for optical communication systems with direct detection 1447 communication a costeffective solution for highrate image, voice, and data transmission. Study, analysis and application of optical ofdm, single carrier sc and mimo in intensity modulation direct detection imdd. Ofdm 6 patents in pictures please refer to the patent documents for full disclosures and inventors. Home forums system direct detection ofdm direct detection ofdm idahor emmanuel joined february 2016 participant i am designing a direct detection ofdm on optisystem file attached below and am having errors with my ofdm modulator, can someone help please. Demonstration of using multiband 16qam ofdm modulation. Direct detection th3k directdetection optical ofdm weiren peng author information. Detection is particularly interesting for the downlink of passive optical networks as. Ofdm based direct detection optical communication system ofdm based optical communication systems are categorized into direct detection and coherent detection systems.
Pdf on jun 21, 2017, jian dang and others published ofdm systems. Impact of machzehnder nonlinearity on the receiver. Reconfigurable wdmofdmpon employing wavelength selective switching with ssb and direct detection optical ofdm. With this technique we have successfully demonstrated the transmissions of 720 and 1200km ssmf, respectively, at 214 and 117gbs data rates.
Here we have proposed a novel architecture of wavelength division multiplexed orthogonal frequency division multiplexing ofdmpassive optical network wdm ofdmpon which is capable of transmitting 10 gbps data both in downstream and upstream directions up to 50 km. On the other hand, direct detection dd significantly reduces the system complexity. Subcarrier level performance investigation of post. In order to combat for the fibre chromatic dispersion cd, linear field modulation is typically applied in ddo ofdm transmissions. For the 12 gbits colorless implementation, the awg generates the ofdm signal and its hilbert transform. Index terms optical fiber communication, orthogonal frequencydivision multiplexing ofdm, directdetection dd. The study was conducted with qam and dpsk modulations. Simplified dsp based signal signal beat interference. In this paper, we propose a new peaktoaverage power ratio reduction technique based on a constant envelope orthogonal frequency division multiplexing ceofdm approach to mitigate fiber induced nonlinearities in directdetection optical ofdm ddoofdm systems. Hou tzu huang, chung shin sun, chunting lin, chia chien wei, wei siang zeng, hsi yu chang, boris shih, anthony ngoma corresponding author for this work. Performance of an optical clipped ofdm with normalization is assessed through numerical simulations and monte claro simulation over the awgn channel. Ellis2 1 athens information technology aitnetworks and optical communications noc group, athens, greece 2 photonic systems group, tyndall national institute and department of. Coherent detection is used for linear field modulation and direct detection is used for intensity modulation.
In this context, optical ofdm oofdm is regarded as a promising candidate. Singlesideband orthogonal frequency division multiplexing ssbofdm with direct detection is a potential solution. Ssmi cancellation in directdetection optical ofdm with novel halfcycled ofdm citation for published version apa. In order to combat for the fibre chromatic dispersion cd, linear field modulation is. Unidirectional wdm ofdm pon systems with direct detection ofdm figure 1 shows unidirectional direct detection system. Pmd compensation in fiberoptic communication systems with. It proposes designs for the downstream links of three different access network topologies differentiated by the optical modulation used. Experimental demonstrations of 20 gbits directdetection optical. It is shown that even for differential group delay dgd of 4bw bw is the ofdm signal bandwidth, the degradation due. Orthogonal frequency division multiplexing ofdm for optical transmission has been realized with both direct 1 and coherent 2 detections. We experimentally demonstrate a singleband directdetection polmux ofdm system using novel colorless transmitter and polmux receiver architectures. Layered acoofdm for intensitymodulated directdetection optical wireless transmission article pdf available in optics express 239. The improvement in performance with the use of polarization diversity schemes in co ofdm is studied. A detailed analysis of clipping distortion introduced by digital clipping and normalization is provided.
Asymmetrically clipped absolute value optical ofdm for. If there is any paper known to you which matches this simulation, please share the name of the more info. Pmd tolerant directdetection polarization division. Optical ofdm is mainly classified into direct detection system and coherent detection system. With this technique we have successfully demonstrated the transmissions of 720 and 1200km ssmf, respectively, at 214. Author links open overlay panel colm browning a liang b. Description of nyquistscm and ofdm techniques the direct detection system architecture considered in this paper is shown in fig. Ofdm is a step beyond wavelengthdivision multiplexing wdm. Ofdm is a combination of modulation and multiplexing. Stringent performance requirements are both capacity and reach. A reconfigurable wdmofdmpon employing a wss as a remote node is proposed. Simulation results show that the proposed 10 gbps ddoceofdm system using 16quadrature amplitude modulation 16qam, 2. Direct detection optical ofdm ddo ofdm engineering. This paper presents a systemic theoretical and experimental investigation of compatiblessb modulation in longdistance optical ofdm transmission.
Pmd tolerant direct detection polarization division multiplexed ofdm systems with mimo processing chiachien wei,1, chunting lin,2 and chihyun wang2 1 department of photonics, national sun yatsen university, kaohsiung, taiwan. Ofdm system implementation using compatible ssb modulation. In aaoofdm, absolute value optical ofdm avoofdm signals on the even subcarriers and asymmetrically clipped optical ofdm acoofdm signals on the odd. Pdf with the rapid growth of wireless data demands and saturation of. Performance analysis of direct detection and coherent. Theoretical and experimental investigation of direct detection. Majidy, hussein moradiy, and behrouz farhangboroujeny electrical and computer engineering department, university of utah, salt lake city, utah, usa. Impact of nonlinearities on optical ofdm with direct detection abdulamir ali, jochen leibrich, werner rosenkranz chair for communications, university of kiel, kaiserstrasse 2, 24143 kiel, germany, email.
Direct detection ddoofdm has much extra variants in comparison to the coofdm. According to how optical ofdm signal is being generated, ddoofdm is classified into two categories. Home forums system directdetection ofdm example directdetection ofdm example gokul boro. Publishers pdf, also known as version of record includes final page, issue and volume numbers. Improving sensitivity and spectral efficiency in direct. The null bias point for co ofdm upconversion signifies a fundamental difference between the optical intensity modulation and the optical field modulation. We have investigated novel opticalwireless architecture to provide wimax orthogonal frequency division multiplexing ofdm signals over fiber access network by simulation. Directdetection wimax orthogonal frequency division. From the many architectures being proposed for oofdm, the use of direct.
This is the fastest directdetection ofdm system to date 7 and offers a simpler transmitter architecture compared with. Directdetection ofdm is suitable for cost effective short reach applications and the common trait for ddoofdm is that the direct detection is used at the receiver. Study, analysis and application of optical ofdm, single. Performance analysis of unidirectional wdmofdmpon systems. Pdf on jun 21, 2017, jian dang and others published ofdm systems for optical communication with intensity modulation and direct detection find, read and cite all the research you need on. From the many architectures being proposed for oofdm, the use of direct detection is particularly interesting for the downlink of passive optical networks as costefficient optical network units onus are required. Here direct detection ofdm is used for downstream unicast transmission and simple onoff keying data is used. Abstract the impact of kerr effect and modulator nonlinearity on optical ofdm transmission is studied for an. Pmd compensation in fiberoptic communication systems. Intensity modulation and direct detection imdd is a costeffective. Investigation of tolerable laser linewidth for different. In this paper, a novel energy and spectrally efficient scheme called asymmetrically clipped absolute value optical ofdm aao ofdm is proposed for intensitymodulated direct detection systems. Compilation of the different matlab codes that were used for the experimental part of the research work presented in the article next generation 5g ofdmbased modulations for intensity modulationdirect detection imdd optical fronthauling.
Enhanced unipolar orthogonal frequency division multiplexing euofdm is a novel unipolar multicarrier modulation scheme used in intensity modulation and direct detection systems for optical wireless communication. Compilation of the different matlab codes that were used for the experimental part of the research work presented in the article next generation 5g ofdm based modulations for intensity modulation direct detection imdd optical fronthauling. Direct detection ofdm received optical spectrum left, its components middle and the results right of photodetection in the electrical domain. Gvd effects in amplified directdetection dd systems using singlemode fiber. Abstractwe discuss the use of orthogonal frequencydivision multiplexing ofdm for combating groupvelocity dispersion gvd effects in ampli. In aao ofdm, absolute value optical ofdm avo ofdm signals on the even subcarriers and asymmetrically clipped optical ofdm aco ofdm signals on the odd. In the direct detection scm technique, a single or multiple subcarriers, also referred to as rfsubcarriers, isare used to transmit data over a. Direct data detection of ofdm signals over wireless channels a. In this article, we have demonstrated an optical orthogonal frequency division multiplexing ofdm intensity modulation and direct detection imdd system with different modulation techniques such as quadrature amplitude modulation qam and phase. Ofdm systems for optical communication with intensity modulation.
Orthogonal frequency division multiplexing ofdm in. Experimental demonstration of costeffective intensity. This is the fastest direct detection ofdm system to date 7 and offers a simpler transmitter architecture compared with. In this paper, a novel dspbased ssbi mitigation technique, with.
Multiplexing method of sharing a bandwidth with other independent data channels. As a multicarrier modulation technique, ofdm oqam inherits the advantages. The proposed architecture utilizes direct detection for wimax ofdm. This system contains olts and onus connected through multiplexers and demultiplexers via single mode fiber. Direct detection of exoplanets direct detection producing an actual image of the object, not indirect detection through its influence on its parent star. Experimental demonstration of costeffective intensitymodulation and directdetection optical fastofdm over 40km smf transmission e. We experimentally demonstrate a singleband direct detection polmux ofdm system using novel colorless transmitter and polmux receiver architectures. Kahn, fellow, ieee abstractwe compare the performance of several direct detection orthogonal frequencydivision multiplexing ofdmschemes. Orthogonal frequency division multiplexing ofdm in optical. Direct detection system an overview sciencedirect topics. Long reach colorless wdm ofdmpon using direct detection. We transmit 100 gbits over 500 km of standard smf with a spectral efficiency of 3. Impact of nonlinearities on optical ofdm with direct detection. Performance analysis of direct detection and coherent detection system for optical ofdm using qam.
The quadrature bias point has been widely adopted for both analog and digital direct detection systems. However, an optical wave propagating through the air. Study, analysis and application of optical ofdm, single carrier sc and mimo in intensity modulation direct detection imdd access full text. In this paper, we experimentally demonstrate a 100 gbits optical ofdm system using.
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