Signal processing method, device and system
A signal processing and equipment technology, applied in the field of passive optical network, can solve the problems of low coherent receiving efficiency and high TLD cost, and achieve the effect of improving efficiency and reducing cost
Active Publication Date: 2013-12-04
HUAWEI TECH CO LTD
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[0006] The embodiment of the present invention provides a signal processing method, device and system to solve the problem that only one TLD is set in the prior art, when the GT between each time slot is small, the cost of the TLD is high and the efficiency of coherent reception is low defects, can effectively reduce the cost of TLD, and improve the efficiency of coherent reception
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[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0025] figure 1 It is a flowchart of a signal processing method provided by Embodiment 1 of the present invention. The signal processing method of this embodiment is applied to a passive optical network. The execution subject of this embodiment is an optical line terminal device, specifically, it may be an OLT in a passive optical network. Such...
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The invention discloses a signal processing method, device and system. The method is applied to a passive optical network. The method comprises the following steps of: receiving a first optical signal sent by an optical node according to a first time slot allocation table, wherein the first time slot allocation table comprises a corresponding relation between the optical node and a jth time slot of the optical node, and the first optical signal is sent by the optical node under the jth time slot for sending an ith frame of data; determining a TLD (Tunable Laser Diode) corresponding to the jth time slot of the optical node according to a second time slot allocation table and a wavelength allocation table, wherein the second time slot allocation table is same with the first time slot allocation table, the wavelength allocation table comprises a corresponding relation between the TLD and wavelength of a local oscillation optical signal emitted by the TLD, and the frequency difference between the wavelength of the local oscillation optical signal of the TLD and the wavelength of the first optical signal meets coherent conditions; and conducting the TLD to emit the local oscillation optical signal so as to coherently mix the first optical signal with the local oscillation optical signal. The scheme provided by the invention can reduce the cost of the TLD and improve the coherent receiving efficiency.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of passive optical network (Passive Optical Network, PON for short), and in particular, to a signal processing method, device and system. Background technique [0002] Because optical fiber transmission has the advantages of large capacity, low loss, and strong anti-electromagnetic interference ability, as the cost of optical fiber transmission gradually decreases, PON is an inevitable trend in the development of communication networks. Passive devices are used in PON, and PON is used as the access network in the communication network, which can effectively meet the increasingly high bandwidth requirements of communication services, so PON is favored by more and more operators. [0003] Time Division Multiplexed-Passive Optical Network (Time Division Multiplexed-Passive Optical Network; hereinafter referred to as TDM-PON) is a common network in the PON network. TDM-PON usually includes...
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IPC IPC(8): H04Q11/00H04B10/25H04B10/50
Inventor 卫国赵峻
Owner HUAWEI TECH CO LTD