Analytical Formulation for SNR Prediction in DMDD OFDM-Based Access Systems

André, Nuno Sequeira; Louchet, Hadrien; Habel, Kai; Richter, André

doi:10.1109/lpt.2014.2320825

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…In order to ensure an acceptable BER P e at the receiving side, when binary phase shift keying (BPSK) or M-ary quadrature amplitude modulation (MQAM) is employed, the transmitting power of the kth subcarrier must satisfy Eqs. (10) and (11), respectively.…”

Section: Problem Formulationmentioning

confidence: 99%

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Power-efficient schemes using directly modulated lasers for intensity modulation and direct detection OFDM-PONs

2015

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The intensity modulation and direct detection (IM/DD) passive optical network (PON) has been demonstrated as a cost-effective solution for a long-reach (> 80 km) access system because it can be easily installed and maintained with low cost and complexity. Meanwhile, orthogonal frequency division multiplexing (OFDM) has been widely used in PONs due to its high spectral efficiency and strong resistance to dispersion impairments. So, the IM/DD OFDM-PON emerged. The power efficiency has attracted great research interests in IM/DD OFDM-PONs. The previous works achieved power savings from the perspective of MAClayer or hardware-level optimization, but they neglected designing appropriative algorithms, and the long-reach transmission performance cannot be guaranteed. In this paper, we propose an improved Hughes-Hartogs algorithm (IHHA) to adjust the number of bits and power level allocated for each subcarrier, with the objective to minimize the electrical transmitting power of all subcarriers. The OFDM signal is generated according to the bit/power allocation result of IHHA, and we conduct extensive simulations to verify the long-reach transmission performance of our system. Simulation results show that our system has high power efficiency by using IHHA, and bit error rate satisfies the forward error correction limitation after 100 km single-mode fiber transmission.

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Section: Problem Formulationmentioning

confidence: 99%

“…Because the fiber dispersion is very similar to the multi-path time delay in wireless channels, OFDM can combat the dispersion of a fiber medium [5][6][7][8]. As a result, OFDM has also been applied in IM/DD PONs; thus, the IM/DD OFDM-PON emerged [9,10].…”

Section: Introductionmentioning

confidence: 99%

Power-efficient schemes using directly modulated lasers for intensity modulation and direct detection OFDM-PONs

2015

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“…Dispersion-penalty-free transmission of six 100-MHz-bandwidth LTE-A-like signals with 36.86-Gb/s CPRI-equivalent data rate over a 40-km SSMF fronthaul has been demonstrated by using a single 1550-nm directly-modulated laser (DML) with a modulation bandwidth of only 2 GHz [10]. The dispersion penalty due to the interplay between the fiber chromatic dispersion and the chirp of the DML [13,14] has been avoided by a novel dispersion-penalty mitigation technique based on judicious mapping of the aggregated signals in the frequency domain. The versatility of the DSP-based channel aggregation approach has been shown in a fronthaul experiment, where 36 evolved universal terrestrial radio access (E-UTRA) type wireless signals, six for each standardized bandwidth, 1.4, 3, 5, 10, 15, 20 MHz, are aggregated in a single wavelength channel [11].…”

Section: Introductionmentioning

confidence: 99%

Bandwidth-Efficient Synchronous Transmission of I/Q Waveforms and Control Words via Frequency-Division Multiplexing for Mobile Fronthaul

Liu¹,

Zeng²,

Effenberger³

2014

2015 IEEE Global Communications Conference (GLOBECOM)

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We propose a novel mobile fronthaul transmission scheme to achieve bandwidth-efficient transmission of both the I/Q waveforms of wireless signals and the control words (CWs) between baseband units (BBUs) and remote radio units (RRUs). Unlike the common public radio interface (CPRI) where the I/Q waveforms and the control words are transmitted as a binary sequence in the time domain, the proposed transmission scheme aggregates multiple wireless signals in the frequency domain and transmits them synchronously with a single-carrier quadratureamplitude-modulation (QAM) signal that contains the CWs on a single wavelength channel via frequency-division multiplexing. This approach substantially increases the bandwidth efficiency of the mobile fronthaul. Furthermore, we experimentally demonstrate this scheme by transmitting 32 20-MHz LTE signals together with CPRI-compliant CWs, corresponding to a CPRIequivalent data rate of 39.32 Gb/s, in single optical channel that requires a RF bandwidth of only ~1.6 GHz. After transmission over 5-km standard single-mode fiber (SSMF), the CWs are recovered without error, while the LTE signals are recovered with an error-vector magnitude (EVM) of as low as 3%. This bandwidth-efficient mobile fronthaul technique may find applications in future integrated fiber/wireless access networks to provide ultra-broadband access services.

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Novel multi-band DFT-spread OFDM-PON systems based on intensity modulation and direct detection for cloud computing

et al. 2015

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Analytical Formulation for SNR Prediction in DMDD OFDM-Based Access Systems

Cited by 11 publications

References 10 publications

Power-efficient schemes using directly modulated lasers for intensity modulation and direct detection OFDM-PONs

Power-efficient schemes using directly modulated lasers for intensity modulation and direct detection OFDM-PONs

Bandwidth-Efficient Synchronous Transmission of I/Q Waveforms and Control Words via Frequency-Division Multiplexing for Mobile Fronthaul

Novel multi-band DFT-spread OFDM-PON systems based on intensity modulation and direct detection for cloud computing

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