CN219068216U

CN219068216U - On-off keying wireless transmitting device adopting pulse interval coding

Info

Publication number: CN219068216U
Application number: CN202223442872.2U
Authority: CN
Inventors: 高宇海
Original assignee: Tianjin Hengyuan Innovation Technology Co ltd
Current assignee: Tianjin Hengyuan Innovation Technology Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-05-23
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses an on-off keying (OOK) wireless transmitting device adopting pulse interval coding, which comprises a data input circuit (1), a coding circuit (2), an on-off keying modulation circuit (3), a wireless transmitting circuit (4) and an antenna (5); the method is characterized in that: the coding mode adopted by the coding circuit (2) is pulse interval coding, and compared with other coding modes, the power consumption of the on-off keying wireless transmitting device can be reduced on the premise of unchanged communication rate.

Description

On-off keying wireless transmitting device adopting pulse interval coding

Technical Field

The utility model relates to the technical field of electric communication, in particular to a wireless transmitting device.

Background

On-Off Keying (OOK) modulation is a simplified form of amplitude shift Keying (Amplitude Shift Keying, ASK) modulation, characterized in that the transmitting means generates a higher carrier amplitude when a high level signal needs to be transmitted, and does not generate any carrier signal when a low level signal needs to be transmitted. Since the absence of any carrier signal means that the power consumption of the wireless transmitting device can be close to zero, on-off keying modulation is often used in applications sensitive to power consumption, such as hand-held devices and various battery-powered remote controls or wireless transmission devices.

The on-off keying wireless transmitting device is a common low-cost wireless transmitting device, is mainly used for wireless remote control or electric signal transmission in a medium-short distance, and has the main working frequency of unlicensed frequency bands such as ultrahigh frequency 315MHz, 433.92MHz, 869MHz and the like. The wireless transmission distance can be as short as several meters and as long as hundreds of meters.

To realize remote control or wireless transmission by using on-off keying technology, the information to be transmitted needs to be encoded, that is, different information is represented by transmitting different electric signal combinations. Common encoding methods in the industry include "PT2262 code", "EV1527 code", and the like. Both codes represent different information by transmitting high and low level signals of different time lengths, while the total time length (i.e., bit rate) consumed for encoding unit bit information is fixed, as shown in fig. 2. Specifically, when the encoded data is "1", the ratio of the time lengths of the high level signal and the low level signal is 3:1, a step of; when the encoded data is "0", the ratio of the time lengths of the high level signal and the low level signal is 1:3. the encoding mode has the advantages that the bit rate is fixed, continuous high-level signals or low-level signals do not exist in the continuous data transmission process, error codes are not easy to generate in the wireless transmission process, and a decoding program is conveniently written. However, when the encoded data is "1", the above-described encoding scheme generates a high-level signal for a long period of time, and the power consumption of the wireless transmitting apparatus is not sufficiently optimized.

With the continuous penetration of the internet of things, the requirement of low power consumption of wireless devices is continuously increasing, and the common coding modes face challenges. Because the power consumption of the on-off keying type can be close to zero when transmitting low-level signals, and large power consumption can be generated when transmitting high-level signals, if the on-off keying type wireless transmitting device can be optimized from the aspect of coding, the time for transmitting the high-level signals is as short as possible no matter what data is transmitted, and then the wireless transmitting device is more efficient and energy-saving compared with the existing products.

Disclosure of Invention

In order to solve the problems, the utility model discloses an on-off keying wireless transmitting device, which comprises a data input circuit (1), a coding circuit (2), an on-off keying modulation circuit (3), a wireless transmitting circuit (4) and an antenna (5); in order to reduce the power consumption of an on-off keying wireless transmitting device, a pulse interval coding is adopted by a coding circuit (2), and the method is characterized in that data of each bit is coded into a combination of a high-level signal with the same time length and a low-level signal with different time lengths. On the premise of unchanged communication rate, compared with the traditional PT2262 code or EV1527 code, the time length of the high-level signal generated by coding is obviously shortened, namely the time of the transmitting device for generating the carrier signal is obviously shortened, and therefore, the theoretical power consumption is also obviously reduced.

Drawings

Fig. 1 is a schematic block diagram of an on-off keying wireless transmitting device according to an embodiment of the present utility model, which includes a data input circuit (1), a coding circuit (2), an on-off keying modulation circuit (3), a wireless transmitting circuit (4) and an antenna (5).

Fig. 2 shows information encoding modes commonly used in the industry, such as "PT2262 code", "EV1527 code", wherein the horizontal axis represents the time axis, and the gray part represents the high level signal, and the transmitting device generates the carrier signal; the white part represents a low level signal when the transmitting device does not generate a carrier signal.

FIG. 3 shows an information encoding method according to an embodiment of the present utility model, wherein the horizontal axis is a time axis, and the gray part represents a high level signal, and the transmitting device generates a carrier signal at this time; the white part represents a low level signal when the transmitting device does not generate a carrier signal. The method is characterized in that the encoding mode is pulse interval encoding, namely, the data of each bit is encoded into a combination of high-level signals with the same time length and low-level signals with different time lengths.

Detailed Description

The utility model provides an on-off keying wireless transmitting device adopting pulse interval coding, which is used for reducing the power consumption of the on-off keying wireless transmitting device.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Embodiment one, an on-off keying wireless transmitting device

The utility model provides a wireless transmitting device, which is shown in fig. 1 and 3; comprises a data input circuit (1), a coding circuit (2), an on-off keying modulation circuit (3), a wireless transmitting circuit (4) and an antenna (5). The encoding circuit (2) adopts a pulse interval encoding mode, namely, the data of each bit is encoded into a combination of a high-level signal with the same time length and a low-level signal with different time lengths.

Fig. 3 shows a typical coding scheme of the pulse interval coding employed by the coding circuit (2). Wherein, the horizontal axis is time axis, gray part represents high level signal, and the transmitting device generates carrier signal at this time; the white part represents a low level signal when the transmitting device does not generate a carrier signal. Specifically, no matter the data to be encoded is "0" or "1", the time length of the high-level signal is unchanged, that is, when the unit bit data is transmitted, the time for the transmitting device to generate the carrier signal is unchanged; when the encoded data is "0", the time length of the low level signal is 3 units (3 t); when the encoded data is "1", the time length of the low level signal is 1 unit (t); thereby, the data is encoded as a combination of a high level signal of the same time length and a low level signal of a different time length.

The method and the device provided by the embodiment of the utility model can be realized by using the electronic technology and the radio transmission technology in whole or in part; the module or unit included in the device provided by the embodiment of the utility model can be realized by adopting a structural component and an electronic component.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is defined by the appended claims.

Claims

1. An on-off keying (OOK) wireless transmitting device comprises

The device comprises a data input circuit (1), a coding circuit (2), an on-off keying modulation circuit (3), a wireless transmitting circuit (4) and an antenna (5); it is characterized in that the method comprises the steps of,

the encoding mode adopted by the encoding circuit (2) is pulse interval encoding, namely, encoding data of each bit into a combination of high-level signals with the same time length and low-level signals with different time lengths.

2. The apparatus of claim 1, wherein the device comprises a plurality of sensors,

the time length of the high level signal in the pulse interval coding is shorter than or equal to the time length of the low level signal.