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We propose a variable-power rate-adaptive LDPC-coded OFDM scheme, suitable for use in radio-over-fiber technologies. The optimum power-rate adaptation is used to compensate for limited bandwidth of graded-index plastic-optical-fiber, while wireless receiver diversity is used to overcome the multipath fading.
We propose a coded-modulation scheme suitable for beyond 100 Gb#s transmission and 100 Gb#s Ethernet. It is based on polarization multiplexed coded-orthogonal frequency division multiplexing (OFDM). By using 32-QAM-based polarization multiplexed coded-OFDM, we are able to achieve the aggregate rate of 100 Gb#s, while the OFDM signal bandwidth is only 10 GHz, resulting in a spectral efficiency of 10...
Orthogonal frequency division multiplexing (OFDM) is a technique that provides high data rate communications, but it is sensitive to the carrier frequency offset (CFO) caused by the misalignment in carrier frequencies between transmitter and receiver, which results in Inter-Carrier Interference (ICI) among the sub-carriers and degrades the Carrier-to-Interference Ratio (CIR). In this paper, we propose...
We present a PMD compensation scheme suitable for use in multilevel coded-modulation schemes, with PMD compensation efficiency comparable to that of OFDM, but with lower complexity of both transmitter and receiver. It is based on Alamouti-type polarization-time coding, with LDPC codes as channel codes.
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