Method and device for generating and receiving optical OFDM-MSK signals

A receiving device and signal technology, applied in the field of optical communication network, can solve the problems of inconsistency of phase modulation offset, no combination of minimum frequency shift keying, complex digital signal processing, etc., to achieve performance improvement, digital signal processing Simple and feasible, the effect of simplifying the process of digital signal processing

Inactive Publication Date: 2010-04-07
FUDAN UNIV
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Problems solved by technology

[0003] However, the fiber optic OFDM systems that have been reported at home and abroad are only limited to the combination of phase shift keying (PSK) modulation technology or quadrature amplitude (QAM) modulation technology, and do not involve the combination of minimum frequency shift keying (MSK) modulation technology
When using PSK modulation or QAM

Method used

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  • Method and device for generating and receiving optical OFDM-MSK signals
  • Method and device for generating and receiving optical OFDM-MSK signals
  • Method and device for generating and receiving optical OFDM-MSK signals

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Embodiment Construction

[0030] Such as figure 1As shown, the transmitting end device of the direct modulation-detection optical OFDM-MSK communication system is composed of a continuous wave laser 11 and a data loading module. Among them, the data loading module includes a data signal source 12, an MSK encoder 13, a signal demultiplexing mapping device 14, a signal inverse Fourier transform device 15, a parallel-to-serial conversion device 16, a digital-to-analog conversion device 17, and a single-electrode electro-optic modulation Device 18. By using a single-electrode electro-optic modulator 18 to realize the data loading function, further realize the conversion of the electrical OFDM-MSK signal to the optical OFDM-MSK signal. The connection mode and working steps are as follows: the continuous wave laser 11 is connected to the optical input end of the single-electrode electro-optic modulator 18, the data signal source 12 is connected to the MSK encoder 13, and the MSK encoder 13 is connected to t...

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Abstract

The invention belongs to the technical field of optical communication networks, and particularly relates to a device for generating and receiving optical OFDM-MSK signals. The device comprises a transmitting device and a receiving device, wherein the transmitting device comprises a continuous wave laser, a data signal source, an MSK encoder, a signal demultiplexing mapping device, a signal inverse Fourier transformer, a parallel-to-serial conversion device, a digital-analog conversion device and a single-electrode electro-optical modulator; and the receiving device comprises the main components of a photoelectric detection diode, a digital-analog conversion device, a parallel-to-serial conversion device, a signal Fourier transformer, signal de-mapping multiplexing device, an MSK decoder, a data receiver and the like. The device is simple in structure, stable in performance and low in price. The device can be used for improving the performance of optical OFDM signals in a direct modulation-detection optical OFDM communication system and a coherence modulation-detection optical OFDM communication system, and simplifying the processing of demodulation signals in a receiving machine.

Description

technical field [0001] The invention belongs to the technical field of optical communication networks, and in particular relates to a device for generating and receiving optical OFDM-MSK signals, which can be used to improve the performance of optical OFDM signals in direct modulation-detection optical OFDM communication systems and coherent modulation-detection optical OFDM communication systems and simplify the processing of the demodulated signal in the receiver. Background technique [0002] Recent studies have shown that Orthogonal Frequency Division Multiplexing (OFDM) signals can also be used in long-distance optical fiber communication systems [Jean Armstrong., OFDM for Optical Communications. JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL.27, NO.3, FEBRUARY1, 2009, 189-204], it is considered that OFDM combined with modulation technology can resist the influence of fiber dispersion and polarization mode dispersion, especially it can be used to compensate the dispersion in WDM ...

Claims

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Application Information

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IPC IPC(8): H04B10/155H04L27/26H04L27/34H04B10/50H04B10/60
Inventor 邵宇丰迟楠方武良
Owner FUDAN UNIV
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