Optical Distribution and Upconversion of MB-OFDM in Ultrawide-Band-Over-Fiber Systems

Lombard, Philippe; Guennec, Yannis Le; Maury, G.; Novakov, E.; Cabon, B.

doi:10.1109/jlt.2008.923233

Cited by 14 publications

(6 citation statements)

References 11 publications

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“…Here, for OFDM, the Cyclic Prefix, 1/4 of the symbol duration, is added in the front of the symbol to eliminate the inter-symbol interference from the previous symbol. The reason why we choose the OFDM-UWB is due to the high efficiency in capturing energy and the robustness to RF interference in multi-path environment [2] [17].The current OFDM-UWB standard (WiMedia specification v1.2) has just considered QPSK Baseband Modulation. Here, we employ different Baseband modulations for this system and analyze BER in Fig.…”

Section: B Novel Scm/dwdmmentioning

confidence: 99%

“…Many approaches for mixing or up-conversion of RF signals have been reported, either electronically or optically, such as utilizing Optical DSB [10] [11] [12], Single-SideBand (SSB) [11] [12], and Optical Carrier Suppression (OCS) modulation [13] [22], the unique integration of ROF and UWB, is a feasible solution for Fiber-To-The-Home (FTTH) access networks providing high-definition (HD) audio/video [18], Intelligent Transport System (ITS) [21], and so on. OFDM-UWB is introduced to this system because OFDM has major advantage of its robustness against multi-path propagation, good spectral efficiency, high-data-rate capabilities between 55 and 480 Mbps, and low power consumption [2] [17]. For UWB, the coverage is limited, typically smaller than 4 m at 200 Mbits/s, due to the low emitted PSD [2].…”

Section: Introductionmentioning

confidence: 99%

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60-GHz Ultra-WideBand Radio-Over-Fiber System employing SCM/WDM

Huang

Kohno

2013

2013 IEEE International Conference on Ultra-Wideband (ICUWB)

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We firstly propose a 60-GHz Ultra-WideBand (UWB) Radio-Over-Fiber (ROF) System employing Subcarrier Multiplexing/Dense Wavelength Division Multiplexing (SCM/DWDM) to extend the coverage and improve high channel efficiency for UWB communication systems. SCM/DWDM is first utilized to the UWB-ROF system, due to the better channel efficiency with narrower channel spacing of the DWDM and the unique commonality of the simple SCM, achieving the large bit rate and high-mobility requirements for the 60 GHz. The novel Optical Frequency Multiplication (OFM) Modulation (Frequency Quadrupler) of 15 GHz lower RF is more cost-effective with much lower RF requirement and dispersion-tolerant even up to a 50 km optical transmission distance in the standard SingleMode Fiber (SMF), compared with Optical Double-Sideband (DSB) Modulation of 30 GHz higher RF. Moreover, we also investigate the novel Punctured Convolutional coding for the system, indicating a trade-off between throughput and Bit Error Ratio (BER). The maximum 1120 Mbits/s throughput per band can be achieved at the expense of 6 dB Eb/No penalty, in contrast to the maximum 480 Mbits/s per band of the current standard Orthogonal-Frequency-Division Multiplexing (OFDM)-UWB (WiMedia specification v1.2). This study provides a potential solution for the modulation and coding designs of a practical UWB-ROF system.

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Section: B Novel Scm/dwdmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

60-GHz Ultra-WideBand Radio-Over-Fiber System employing SCM/WDM

Huang

Kohno

2013

2013 IEEE International Conference on Ultra-Wideband (ICUWB)

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“…The UWB range can be improved by utilizing some networks. One way to extend the range is to use Radio over Fiber (RoF) [3], [4]. Due to wide bandwidth and high data rate of UWB signals, RoF technology is an excellent alternative for UWB signal transmission.…”

Section: Introductionmentioning

confidence: 99%

Design of an optical UWB pulse leading to an in-band interference tolerant impulse radio UWB transceiver

Hedayati

Arvani

Noshad

et al. 2011

2011 IEEE International Conference on Ultra-Wideband (ICUWB)

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Impulse-radio UWB (IR-UWB) transceivers are quite interesting since they can achieve high data rate while consuming low power. But UNII Band interferers are a serious problem for using the whole spectrum in IR-UWB. Also the short range of UWB is a serious limitation to this technology. Here we have proposed a solution to overcome both of the above mentioned problems. Matched filter concept shapes the output noise according to its spectrum so it can act as a noise filter. Matched filter is implemented in analog domain by designing an all optical UWB pulse featuring notches that can be tuned to a certain frequency. Therefore, any narrowband interferer can be nulled out passing through the matched filter. Also no transmission is done in the spectrum of the narrow band system so no interference is caused by UWB system. On the other hand since the pulse is implemented fully optically, by using UWB over fiber, the UWB range can be greatly extended. Modified Hermite polynomials have unique properties which are used for designing an optical UWB pulse with frequency nulls in its spectrum. For optical implementation of the proposed UWB pulse, Gaussian laser beams are combined to provide a signal with similar properties of Modified Hermite polynomials. The proposed system consists of a single wave length laser source, optical delay, power splitter/combiner, a length of single mode fiber (SMF) and a photo detector (APD). The simulation results shows that for short range communication the proposed architecture can tolerate large in band interferers up to 30 dBm. For long range the tolerance is degraded to 0dBm interferer power which is still quite high.

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“…The evaluation of the BER from the error vector magnitude (EVM) or from the Q factor approaches have been used to quickly experimentally evaluate the performance of optical direct‐detection (DD) OFDM systems [2–4]. However, these approaches present some limitations that may lead to some inaccuracy of the BER estimates: (i) the Q factor is evaluated over all the symbols of the received constellation neglecting the different signal‐to‐noise ratios (SNR) of symbols carried in different OFDM subcarriers; (ii) the standard expressions used to evaluate the BER from the EVM or the Q factor consider that the distortion of the received signal can be neglected which is not usually the case, e.g., due to the optimized operation of the electro‐optic modulator [5].…”

Section: Introductionmentioning

confidence: 99%

Extension of the exhaustive Gaussian approach for BER estimation in experimental direct‐detection OFDM setups

Alves

Cartaxo

2010

Micro & Optical Tech Letters

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where d is the distance between the tag and the transmitting antenna, P min is the minimum power relative to the tag to be read by the reader, G t ¼ 5.7 dBi, and L c ¼ À1.5 dB at 925 MHz for the chamber system. In those measurements, d was fixed at 3.6 m, and the measured P min was obtained at about 27.5 dBm. Therefore, if the EIRP of the reader is set to 4 W, the maximum readable range for our design will be 5.9 m. This result is also better than those compact tags presented in Refs. 6-9, so that the proposed tag antenna is more suitable for applications in various commercial purposes. CONCLUSIONSA novel miniature monopole tag antenna with a quasi-lumped matching circuit for UHF RFID applications has been presented and discussed. Compared with other tag designs, the proposed structure is rather compact and more suitable for conventional printed circuit board (PCB) procedure, so that it can be easily integrated within various modern portable devices. In such small tag design, both good coverage and stable gain variation are obtained. Experimental results also demonstrate that the maximum readable range of the fabricated tag is verified about 5.6 m with an EIRP equal to 4 W. For these reasons, the proposed tag antenna can satisfy more commercial purposes in the future.ABSTRACT: An extension of the exhaustive Gaussian approach to estimate the bit error ratio from a set of experimental runs in directdetection orthogonal frequency division multiplexing optical communication systems is proposed. The approach provides fast and Figure 6 Experiments of the maximum readable range. (a) Measurement setup (b) Chamber environment. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com] Figure 5 Measured gains against frequency of the proposed tag antenna 2772 accurate bit error ratio estimates avoiding the high amount of data required by direct error counting. ABSTRACT: A novel coplanar equilateral triangular-ring slot antenna with dual frequency operation is proposed for WLAN (Wireless LocalFigure 4 BER as function of (a) the number of OFDM-UWB symbols and (b) the number of runs. In (b) BER given by EGA (squares), DEC (lines), EVM (triangles) and Q factor (diamonds) Figure 5 (a) BER as a function of the subcarrier index. BER obtained from EGA (continuous line), DEC (squares), EVM (dashed line) and the Q factor (dashed-dotted line). (b) BER as a function of the OSNR

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Optical Distribution and Upconversion of MB-OFDM in Ultrawide-Band-Over-Fiber Systems

Cited by 14 publications

References 11 publications

60-GHz Ultra-WideBand Radio-Over-Fiber System employing SCM/WDM

60-GHz Ultra-WideBand Radio-Over-Fiber System employing SCM/WDM

Design of an optical UWB pulse leading to an in-band interference tolerant impulse radio UWB transceiver

Extension of the exhaustive Gaussian approach for BER estimation in experimental direct‐detection OFDM setups

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