Adaptive Loading Algorithm Implemented in AMOOFDM for NG-PON System Integrating Cost-Effective and Low-Bandwidth Optical Devices

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

“…The previous works achieved power savings for OFDM-PONs from the perspective of MAC-layer or hardware-level optimization, but they neglected designing appropriative algorithms, and the long-reach transmission performance cannot be guaranteed [13][14][15][16]. Though the adaptive modulation can improve the transmission performance of IM/DD OFDM-PONs by adjusting the bit/power allocation for each subcarrier [17][18][19][20], most of existing schemes focused on optimizing the transmission rate not power consumption. Furthermore, our preliminary work has shown that the power consumption of OFDM-PONs can be minimized by using the novel bit and power loading algorithm [16].…”

Improved optical orthogonal frequency‐division multiplexing performance using non‐linear signal compression in intensity modulation and direct detection transmission systems incorporating parameter‐relaxed digital‐to‐analogue converters/analogue‐to‐digital converters

“…Recently optical orthogonal frequency-division multiplexing (OOFDM) has been considered as one of the most promising 'future-proof' physical-layer transmission technologies for practical implementation in next generation high-capacity optical access networks [1][2][3][4][5][6][7], since OOFDM has a large number of inherent and unique advantages including, for example, (i) great potential for providing a cost-effective technical solution by fully exploiting the rapid advances in modern digital signal processing (DSP) technology; (ii) considerable reduction in optical system/ network complexity owing to its excellent resistance to various linear component/system impairments and (iii) excellent adaptability and highly efficient utilisation of channel spectral characteristics. Apart from the above-mentioned features, OOFDM is also capable of offering, in both the frequency and time domains, adaptive and hybrid dynamic bandwidth allocation at sub-wavelength granularity among various end-users and significantly improved system flexibility and performance robustness.…”

Phase modulation-enabled transmission performance improvement and parameter-relaxation of DACS/ADCS in SMF-based IMDD optical OFDM systems

“…Recently, optical orthogonal frequency division multiplexing (OOFDM) has been considered as one of the most promising "future-proof" physical-layer technologies for practical implementation in next generation high-capacity optical access networks [1][2][3][4][5], since OOFDM has a number of inherent and unique advantages including, for example, potential for providing a cost-effective technical solution by fully exploiting the rapid advances in modern digital signal processing (DSP) technology, and considerable reduction in optical network complexity owing to its great resistance to linear system impairments and efficient utilization of channel spectral characteristics. Apart from the above-mentioned advantages, OOFDM is also capable of offering, in both the frequency and time domains, hybrid dynamic allocation of broad bandwidth among various end-users, and considerably improving system flexibility and performance robustness.…”

“…Apart from the above-mentioned advantages, OOFDM is also capable of offering, in both the frequency and time domains, hybrid dynamic allocation of broad bandwidth among various end-users, and considerably improving system flexibility and performance robustness. For cost-sensitive access network scenarios, intensity modulation and direct detection (IMDD) adaptively modulated OOFDM (AMOOFDM) [1,[3][4][5] has, demonstrated even strong competitiveness over other OOFDM techniques. In all previously published AMOOFDM papers [1,3,[5][6][7], to convert an electrical OFDM signal into the optical domain, a real-valued electrical OFDM signal emerging from the transmitter field-programmable gate array (FPGA) is utilised, whose phase is, however, unused.…”

“…When compared to conventional AMOOFDM based on amplitude modulation [1,3,[5][6][7], the proposed technique has salient advantages including: 1) Significant reduced PAPRs, as discussed in Section 4 of the paper. 2) Relaxed requirements on key transceiver components.…”