Carrier recovery for high speed coherent optical communication systems based on digital signal processing

... requires high speed data communication within data-centers and high performance computers [3] The optical communication systems can be divided into two categories based on their detection method One ... that employ optical fibers for information transmission The carrier frequencies for optical communication systems are in the range of 100 THz which is the visibl...

Ngày tải lên: 12/09/2015, 09:28

... different advanced modulation formats in systems which include not only AWGN noise but also linear phase noises –3– Study on Advanced Modulation Formats in Coherent Optical Communication Systems ... –20– Study on Advanced Modulation Formats in Coherent Optical Communication Systems Chapter Performance Analysis of 4-Point Modulation Formats...

Ngày tải lên: 09/09/2015, 10:15

... heterodyne receiver, the carrier frequency ω is close to the local oscillator frequency ω0 50 Ω LO Figure 3: Layout of the V-band multiport circuit Therefore, these receivers are low IF heterodyne receivers ... proposed multiport approach This conventional receiver can be implemented using a V-band downconverter mixer (a balun and two Schottky diodes, e.g.) and a IF I/Q mixer I...

Ngày tải lên: 22/06/2014, 22:20

... OBPF Optical Band-pass Filter ODI Optical Delay Interferometer OEO Optical- Electrical -Optical OOK On-Off Keying OPM Optical Performance Monitoring OSNR Optical Signal-to-Noise Ratio OTF Optical ... OSNR monitoring and CD monitoring techniques In addition, time alignment of optical transmitter is also investigated Optical Signal to Noise Ratio Monitoring Among the...

Ngày tải lên: 09/09/2015, 08:17

... section, can realize this strategy 3.1 A HARDWARE ALGORITHM FOR MORPHEME EXTRACTION FUNDAMENTAL ARCHITECTURE A new hardware algorithm for the morpheme extraction, which was designed with the strategy ... Search Method (Knuth,197S) CONCLUSION This paper proposes a new hardware algorithm for high speed morpheme extraction, and also describes its implementatio...

Ngày tải lên: 21/02/2014, 20:20

... Sensitive Hash Function; Performance of fast Hamming distance search algorithm; Quality of final similarity lists 5.1 Evaluation of Locality sensitive Hash function To perform this evaluation, we randomly ... calculated using the traditional formula as given in equation For this base comparison system we use the one built by Pantel and Lin (2002) We perform kinds of evaluati...

Ngày tải lên: 08/03/2014, 04:22

... “Digital pulse interval modulation for optical communications, ” IEEE Communications Magazine, vol 36, no 12, pp 95–99, 1998 [13] T Svedek and S Rupcic, “Anisochronous modulation methods for optical ... and R Kohno, “Combined pulse shape and pulse position modulation for high data rate transmissions in ultra-wideband communications, ” International Journal of Wireless...

Ngày tải lên: 21/06/2014, 08:20

... (16) For example, an SNR of 36 (15.6 dB) is required to achieve a BER of 10−9 2.5 Channel Bandwidth The bandwidth of the indoor channel is computed from the Fourier transform of the channel ... a uniform and full coverage of power distributions and this can be achieved by modifying some key parameters of the multibeam transmitter, such as the number of transmitters, ele...

Ngày tải lên: 21/06/2014, 17:20

... coding to maintain a near-MAP performance in frame error ratio [5] In this paper, its performance with the aid of H-ARQ is investigated In order to validate MFCSO from VLSI implementation perspectives, ... paper MultiAntenna in LTE and WiMAX Wireless standards such as 3GPP LTE and WiMAX have incorporated MIMO transmission schemes to boost the peak data rate Meanwhile, software-define...

Ngày tải lên: 21/06/2014, 17:20

... interconnects at speeds higher 10 Gb/s Fiber optic links based on vertical-cavity surface- emitting lasers (VCSELs) are broadly believed to be the best candidates [2–4] for these applications in the foreseeable ... significant increase of the modulation speed of VCSELs combined with the demands for power, degradation robustness and speed of next generation ultrahigh speed systems...

Ngày tải lên: 22/06/2014, 18:20

... MAC designs should control contentions and collisions over the shared wireless channel and deliver stable performance Protocol overhead scalability The third aspect in scalable wireless MAC design ... modeling the DCF MAC The result cannot be readily applied to high-speed wireless networks The MAC design in high-speed wireless networks, such as IEEE 802.11n, 12 EURAS...

Ngày tải lên: 22/06/2014, 19:20

... development of digital signal processing algorithms for front- end non- idealities in CO -OFDM system The goal is to design efficient and effective algorithms for combatting carrier frequency offset, linear ... metric in the presence of linear phase noise deserves great attention In this thesis, we will focus on combatting the front- end non- idealiteis in CO -OF...

Ngày tải lên: 09/09/2015, 11:06

... DEVELOPMENT OF HIGH MOBILITY CHANNEL LAYER FORMATION TECHNOLOGY FOR HIGH SPEED CMOS DEVICES OH Hoon Jung (B Sc., Ewha Womans University, Korea) ... the use of new gate stack materials Thus this work of development of high mobility channel layer formation technology has been carried out for the innovative change The subsequent sections in ... pro...

Ngày tải lên: 11/09/2015, 10:00

... application of fine- pitch, high- speed wafer- level packaged device testing have been proposed and studied An interposer is needed for the wafer level test because the fine pitch, high pin count, high ... is required for the electrical high speed testing of fine pitch wafer level packaged devices It provides a solution to the required fine...

Ngày tải lên: 04/10/2015, 10:25

... Brief History of Wireless Optical Communications Figure 1.1 An indoor wireless optical communication system Figure 1.1 presents a diagram of a typical indoor wireless optical communications scenario ... Wireless Optical Communication Systems This page intentionally left blank WIRELESS OPTICAL COMMUNICATION SYSTEMS STEVE HRANILOVIC Assistant Professor ... Introduc...

Ngày tải lên: 23/10/2015, 20:19