OCDM systems with PSK and QAM codes

Kodama, Takahiro; Cincotti, Gabriella

doi:10.1016/j.optcom.2020.125538

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…To this aim, optical coherent technologies are perceived here as a prospective solution to be implemented along with code-division multiple-access (OCDMA) multiplexing technique for broadband service provision in PON. By its turn, OCDMA has unique inherent features, like, for example, asynchronism access to the transmission channel (which makes this technique particularly useful and efficient for practical network deployment), higher security support, and soft multiplexing, to name but a few [7]- [12].…”

Section: Introductionmentioning

confidence: 99%

Rate-Flexible Optical CDMA Networks Based on Coherent Modulation Formats

Sanches

Abuhelala

Raddo

et al. 2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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In this paper, we propose, design, and assess the performance of optical coherent access networks based on optical code-division multiple-access (OCDMA) based on three distinct coherent modulation formats, namely, BPSK, QPSK, and 16-QAM. We design a flexible network architecture based on these coherent modulation formats to provide either single data rate transmissions or multiple data rate transmissions. In this way, the network supports users with the same transmission rate, or group of users transmitting at different data rates. We derive new close-form analytical expressions for both single and multiple rate use cases to assess the performance of the coherent OCDMA network. Results shown that the multi-rate data traffic from the users can coexist almost transparently in terms of network performance. The flexible OCDMA network might be a prospective alternative for implementing coherent systems for different service provision according to traffic demand requirements while supporting with high capacity, security, and simultaneous numbers of subscribers.

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Section: Introductionmentioning

confidence: 99%

Rate-Flexible Optical CDMA Networks Based on Coherent Modulation Formats

Sanches

Abuhelala

Raddo

et al. 2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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Design of high-order QAM modem algorithm

Yinghui¹,

Changlong²

2021

J. Phys.: Conf. Ser.

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More and more attention has been paid on the issue of bandwidth utilization. Nowadays, with limited frequency spectrum resources, the capacity of traditional communication system has not been able to meet the demands of users. Quadrature Amplitude Modulation (QAM) has become a critical technical solution for broadband wireless access and wireless video communication due to its advantages of high frequency spectrum utilization and high-power spectrum density. In order to further improve the control information transmission performance of high-order QAM, we propose a high-order QAM modulation and demodulation algorithm, which is designed from the aspects of interleave between channels, leading sequence, constellation modulation, frequency domain sampling and (Orthogonal Frequency Division Multiplexing) OFDM generation, etc. The simulation results demonstrate that the algorithm can ensure the reliable reception of control information.

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OCDM systems with PSK and QAM codes

Cited by 2 publications

References 25 publications

Rate-Flexible Optical CDMA Networks Based on Coherent Modulation Formats

Rate-Flexible Optical CDMA Networks Based on Coherent Modulation Formats

Design of high-order QAM modem algorithm

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