Method of wireless electricity transmission based on orthogonal frequency division multiplexing (OFDM)

Abstract

The invention provides a method of wireless electricity transmission based on orthogonal frequency division multiplexing (OFDM). In terms of structure, based on an idea of saving network nodes and shortening time delay in data transmission, a flat network deploying manner is utilized, four layers of 'a terminal-access equipment-core network equipment-a main station of a power grid' are divided, network equipment is internet protocol (IP)-based and can be identified uniquely through an IP address in the main station of the power grid. In terms of physical channels, three-layer communication protocol systems is built up and comprises a layer of physics, a layer of data linkage and a layer of wireless sources control. Each layer uses a certain technological scheme and performs uploading and downloading of data. All layers converge and are integrated in the core network equipment, and achieve interacting with the main station of the power grid though a manner of wired communication and transmission of power data. According to the method of wireless electricity transmission based on OFDM, OFDM and other key technologies which are in line with the developing trend of the fourth-generation (4G) international main current mobile communication technology are combined with authorized frequency points in the power industry, so that application of an advanced wireless communication technology in data transmission in power service is guided and a reasonable and competitive wire transmission access is built up.

Description

technical field [0001] The invention belongs to the field of power system communication, and in particular relates to a method for wireless power transmission based on OFDM. Background technique [0002] Since the 1990s, 230MHz digital radio has been widely used in the power industry. With its simple equipment and reliable performance, the digital transmission station promotes the large-scale application of the power load control business. The coverage of 230MHz digital radio stations adopts the communication method of regional system and single-point polling. A modem (MODEM) is implanted inside the conventional ultrashort wave FM radio station. When sending data, the pulse signal (that is, the data signal) Converted to an analog signal, it goes through a reverse process when receiving, and the received analog signal is restored to a pulse signal through the demodulator of the MODEM. [0003] In terms of networking structure, the commonly used networking methods of wireles...

AI Technical Summary

Problems solved by technology

[0010] The coverage of 230 digital radio stations adopts the communication method of large-area system and single-point polling, which has low spectrum utilization and slow transmission speed

In practical applications, the polling of a single base station often takes several hours, and polling cannot be completed even within 24 hours in some busy areas

[0011] The data rate of 230MHz digital transmission station is low (19.2kbps), which cannot meet the needs of multimedia services; it can only realize point-to-point transmission, the network management function is weak, and it does not have the ability of large-scale networking; the corresponding digital transmission module is expensive

Compared with large-bandwidth continuous spectrum allocation, this discrete narrow-band spectrum is difficult for high-speed data transmission

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