A new high-efficiency optical-microwave mixing approach

The performance of radio-over-fiber (ROF) optical transmission and wireless transmission of ultrawideband (UWB) system administrations is described when operating in the underwater communication. In order to increase the coverage and enhance channel efficiency, ROF system which employs subcarrier multiplexing (SCM) and dense wavelength-division multiplexing (DWDM) is used. DWDM provides efficient channel with tapered channel spacing, whereas SCM's unique commonality helps in achieving high mobility and large bitrates. The performance of dual-carrier modulation orthogonal frequency-division multiplexing is compared with other modulation techniques, and to indicate an exchange between bit error ration and throughput for the system, our work investigates the punctured turbo coding. For 6 dB Eb/No value, a maximum of 1120 Mbps throughput per band can be accomplished in comparison with 480 Mbps per band of the orthogonal frequency-division multiplexing UWB. To modulate and to develop code designs for a rational UWB-ROF and wireless system in underwater communication with VLC, the proposed study provides a reliable solution. Keywords Ultra-wideband (UWB) Á Punctured turbo coding orthogonal frequency-division multiplexing (OFDM) Á Radio-over-fiber (ROF) Á Wavelength-division multiplexing (WDM) Á Optical frequency multiplication (OFM) Á Dual-carrier modulation (DCM) Á Sub-carrier multiplexing (SCM)

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“…14.336 Gbps is the combined bitrate per user. But these specifications haven't been achieved yet [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of turbo-coded DCM-OFDM ultra-wideband system with radio-over-fiber and wireless transmission in underwater communication

Manimegalai

Gauni

Kalimuthu

et al. 2020

J Opt

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“…Various approaches have been reported to implement microwave photonic mixers [2][3][4][5][6][7][8][9][10][11][12][13]. The conventional structure comprises a series connection of two electro-optic modulators, in which one is driven by the RF signal and the other is driven by the LO [2].…”

Section: Introductionmentioning

confidence: 99%

Microwave photonic mixer with high spurious-free dynamic range

2014

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A new linearized photonic mixer structure, which can fully eliminate the third-order intermodulation distortion, is presented. It is based on an integrated dual-parallel Mach-Zehnder modulator to which an optimized RF split and an optimized optical phase shift are applied, in series with a Mach-Zehnder modulator driven by the LO. The mixer achieves a very high spurious-free dynamic range performance, it enables essentially infinite isolation between the RF and LO ports, and it has the ability to function over a multioctave frequency range. Experimental results demonstrate a record measured spurious free dynamic range performance of 127 dB·Hz(4/5), which is over 22 dB higher than that of the conventional dual-series Mach-Zehnder modulator-based microwave photonic mixer.

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“…However, we must overcome the problems in the design of broadband RF mixers, luckily optical mixing provides an attractive solution to take advantage of the large BW of the optical domain. Optical upconversion for RF signals have been intensively investigated in the last decades because it allows one to centralize frequency-conversion operation in the Headend to make different BSs very simple [23] [24] [25]. SCM is a technology where multiple RF signals are multiplexed in the RF domain and then transmitted by a single optical wavelength, with high optical bandwidth efficiency and high dispersion tolerance in combination of WDM [26].…”

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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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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A new high-efficiency optical-microwave mixing approach

Cited by 45 publications

References 19 publications

Design and analysis of turbo-coded DCM-OFDM ultra-wideband system with radio-over-fiber and wireless transmission in underwater communication

Design and analysis of turbo-coded DCM-OFDM ultra-wideband system with radio-over-fiber and wireless transmission in underwater communication

Microwave photonic mixer with high spurious-free dynamic range

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

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