Full-Duplex Radio-Over-Fiber System Using Phase-Modulated Downlink and Intensity-Modulated Uplink

Ji, Ho-Chul; Kim, Hoon; Chung, Yun Chur

doi:10.1109/lpt.2008.2007969

Cited by 42 publications

(11 citation statements)

References 9 publications

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“…Thus, the UL signal can be filtered out from the signal that is photo-detected at the BS. Furthermore, it is possible to phase-modulate the optical carrier during its DL transmission and then intensity modulate the same optical carrier for its UL transmission as detailed below [123], [124], [6]. As shown in Fig.…”

Section: ) Optical Carrier Recovery and Re-use (Ocrr)mentioning

confidence: 99%

“…69 is balanced photo-detected after performing a phase to intensity conversion using a delay interometer (DI) such as the MZI of Fig. 19, as discussed in Section III-B [124]. An MZI assists in employing balanced photo-detection, as discussed in Section V. It is worth mentioning that instead of performing phase-to-intensity conversion followed by direct balanced photo-detection, the coherent photo-detection of the phase-modulated signal may also be employed, as discussed Section II-C.…”

Section: ) Optical Carrier Recovery and Re-use (Ocrr)mentioning

confidence: 99%

“…65 was employed in conjugation with DL frequency quadrupling. 2008 Yu et al [123] Implemented ORM by employing optical phase modulation in the DL, while employing 2009 Ji et al [124] optical intensity modulation in the UL. 2013 Thomas et al [3] Implemented wavelength re-use by incorporating the performance improving Digitized ROF (DROF) technique in the UL of Fig.…”

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confidence: 99%

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Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Thomas

El‐Hajjar

Hanzo

2015

IEEE Commun. Surv. Tutorials

139

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Abstract-Advanced cost reduction and performance improvement techniques conceived for Radio Over Fiber (ROF) communications are considered. ROF techniques are expected to form the backbone of the future 5G generation of wireless networks. The achievable link performance and the associated deployement cost constitute the most salient metrics of a ROF architecture. In this paper, we commence by providing a rudimentary overview of the ROF architecture and then elaborate on ROF techniques designed for improving the attainable system performance. We conclude by describing the ROF techniques conceived for reducing the ROF system installation costs.

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Section: ) Optical Carrier Recovery and Re-use (Ocrr)mentioning

confidence: 99%

Section: ) Optical Carrier Recovery and Re-use (Ocrr)mentioning

confidence: 99%

mentioning

confidence: 99%

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Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Thomas

El‐Hajjar

Hanzo

2015

IEEE Commun. Surv. Tutorials

139

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“…On the contrary, some previous research reports on dedicated fibers allocated for DL and UL with the wavelength reuse scheme [10][11][12][13]. A full duplex system with dedicated DL and UL optical fibers is the logical solution to avoid Rayleigh backscattering and optical interference as these are the major performance-limiting factors [14,15].…”

Section: Proposed Full Duplex Lte Systemmentioning

confidence: 99%

Experimental Full Duplex Simultaneous Transmission of LTE Over a DWDM Directly Modulated RoF System

Kanesan¹,

Ng²,

Ghassemlooy³

et al. 2013

J. Opt. Commun. Netw.

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Abstract-In this paper, we experimentally demonstrate the seamless integration of full duplex system frequency division duplex (FDD) long-term evolution (LTE) technology with radio over fiber (RoF) for eNodeB (eNB) coverage extension. LTE is composed of quadrature phase-shift keying (QPSK), 16-quadrature amplitude modulation (16-QAM) and 64-QAM, modulated onto orthogonal frequency division multiplexing (OFDM) and single-carrier-frequency division multiplexing for downlink (DL) and uplink (UL) transmissions, respectively. The RoF system is composed of dedicated directly modulated lasers for DL and UL with dense wavelength division multiplexing (DWDM) for instantaneous connections and for Rayleigh backscattering and nonlinear interference mitigation. DL and UL signals have varying carrier frequencies and are categorized as broad frequency spacing (BFS), intermediate frequency spacing (IFS), and narrow frequency spacing (NFS). The adjacent channel leakage ratio (ACLR) for DL and UL with 64-QAM are similar for all frequency spacings while cross talk is observed for NFS. For the best case scenario for DL and UL transmissions we achieve error vector magnitude (EVM) values of ∼2.30%, ∼2.33%, and ∼2.39% for QPSK, 16-QAM, and 64-QAM, respectively, while for the worst case scenario with a NFS EVM is increased by 0.40% for all schemes.

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“…This requirement of more bandwidth allocation places a heavy burden on the current operating radio spectrum and causes spectral congestion at lower microwave frequencies. Millimetre Wave (mm-Wave) communication systems offer a unique way to resolve these problems (Ji, et al 2009). Radio over fiber (RoF) technology is currently receiving a lot of attention due to its ability to provide simple antenna front ends, increased capacity, and multi wireless access coverage.…”

Section: Radio Over Fiber Networkmentioning

confidence: 99%

Super-Broadband Wireless Access Network

Abdollahi¹,

Al-Raweshidy²,

Owens³

2012

Wireless Communications and Networks - Recent Advances

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Full-Duplex Radio-Over-Fiber System Using Phase-Modulated Downlink and Intensity-Modulated Uplink

Cited by 42 publications

References 9 publications

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Experimental Full Duplex Simultaneous Transmission of LTE Over a DWDM Directly Modulated RoF System

Super-Broadband Wireless Access Network

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