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We successfully demonstrate a direct-detection 34-Gbps OFDM signal transmission over 100-km LR-PON by using a cost-effective 10-GHz EAM and a 10-GHz PIN.
We experimentally demonstrate a superior performance of 2.1-Tb/s·km OFDM-signal transmission over 100-km long-reach PONs, which is achieved by using an EAM and direct-detection, and adopting the 128-QAM format and adaptive subcarrier power weighting.
A 60 GHz phased-array transmitter for multi-Gb/s non-line-of-sight links is fully integrated in a 0.12 ??m SiGe BiCMOS process. It consists of an up-conversion chain with synthesizer, a power distribution tree and 16 phase-shifting front-ends. The IC occupies 44 mm2, draws 1.2 W excluding front-ends, and delivers 9 to 13.5 dBm OP1dB per element drawing 164 to 313 mW per front-end.
This paper proposes a new integration scheme for broadcast and unicast in future OFDM system based on Dirty Paper Coding (DPC) to release the orthogonal resource allocation limitation to systems today. Based on the proposed DPC integration architecture, we focus on one-dimensional DPC to optimize the unicast throughput as well as guarantee the coverage of broadcast. It is shown that there is inevitable...
Space-time modulation exploiting diversity or/and coding gains has been a major focus in high-speed wireless communications systems against channel fading. To avoid channel estimation, we employ noncoherent space-time modulation in single-carrier (SC) block systems over channel frequency-selectivity in this Letter. Capitalizing on multi-channel input-output relation in time domain, we construct space-time...
We present a novel PON architecture supporting RoF and OFDMA signal integration without WDM lasers, and demonstrate 10-Gb/s OFDMA and three RF signals at 2.1 GHz are successfully transmitted over 20 km SMF in a 32-ONU PON.
The E-MBMS (evolved multimedia broadcast and multicast service) in 3GPP LTE is characterized by the MBSFN (MBMS single frequency network) operation. The MBSFN operation requires that the identical signals are transmitted from all the base stations at the same time and in the same frequency. Such requirement implies some restrictions in the resource allocation and may increase the needed bandwidth...
A 2.4 GHz fully-integrated MISO transceiver consisting of two receivers and one transmitter is implemented in 0.18 mum CMOS technology. To alleviate the cost of external front-end components, the RF transmit/receive (T/R) switch and a power-efficient linear CMOS PA are fully integrated on-chip. It shows 3.5 dB low noise figures in the receivers respectively. Also, the transmitter delivers an average...
This paper presents the performance evaluations of microwave power amplifiers (PAs) for complex digital communications based on the time-domain signal processing and the hybrid Volterra series. Modulation schemes included pi/4-DQPSK, 16-QAM, and OFDM formats are examined to show the influences due to the different peak-to-average-power-ratio (PAPR) features on the performances for the output power,...
This paper presents the performance evaluations of microwave power amplifiers (PAs) for complex digital communications based on the time-domain signal processing and the hybrid Volterra series. Modulation schemes included pi/4-DQPSK, 16-QAM, and OFDM formats are examined to show the influences due to the different peak-to-average-power-ratio (PAPR) features on the performances for the output power,...
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