A Short Range Wireless Network Using Cdma Technology Based on Frequency Shift Keying

A wireless network and frequency shift keying technology, applied in the field of communication, can solve the problem of high cost and achieve the effects of low cost, strong anti-fading ability and strong robustness

Active Publication Date: 2020-04-28
东台城东科技创业园管理有限公司
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Problems solved by technology

If CDMA technology can be applied to short-distance communication, it will be able to meet the requirements of the above-mentioned communication very well. Therefore, transforming wireless networks with 3G technology has become one of the current research hotspots. However, the difficulty lies in directly applying 3G technology to wireless networks. The cost of networking is too high

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  • A Short Range Wireless Network Using Cdma Technology Based on Frequency Shift Keying
  • A Short Range Wireless Network Using Cdma Technology Based on Frequency Shift Keying
  • A Short Range Wireless Network Using Cdma Technology Based on Frequency Shift Keying

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Embodiment Construction

[0044] A kind of short-distance wireless network that adopts CDMA technology based on frequency shift keying of the present invention, concrete realization is as follows:

[0045] In the quasi-synchronous CDMA communication system, there is no need for very strict synchronization between the system base station and each mobile user, so the realization is simple. In view of the characteristics of the system, the requirement for the adopted spread spectrum address code group is to have ideal correlation characteristics within the range of synchronization error. Therefore, a quasi-synchronous CDMA system with excellent anti-multiple access interference performance can be realized by only looking for a group of sequences with ideal correlation characteristics near zero time delay as the spread spectrum address code. The zero-correlation zone (ZCZ) sequence is suitable for This need.

[0046] The so-called zero-correlation region sequence means that there is a region of a specific...

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Abstract

The invention relates to a short-range wireless network using a CDMA technology based on frequency shift keying. In a CDMA-based wireless network, after being subjected to spread spectrum, signals ofa sending end are transmitted to a receiving end through a wireless channel, and demodulated and detected; a zero correlation zone ZCZ sequence is used as a spread spectrum address code; a quasi-synchronization CDMA system resisting multi-address interference and having excellent performance is realized; quasi-synchronization delay is controlled within 1 bit; binary frequency shift keying is usedas a modulation and demodulation manner; the zero correlation sequence has ideal correlation characteristics in a zero correlation window near the zero delay; and the spread spectrum sequence can reduce multi-address interference of a QS-CDMA system to the minimum, even completely eliminate. The communication network in the invention has high robustness and anti-fading capability; system implementation is simple; compared with the CDMA technology of a 3G mobile network, the cost is very cheap; and implementation is easily carried out.

Description

technical field [0001] The invention belongs to the technical field of communication, and designs a method for realizing a short-distance wireless network, which is a short-distance wireless network based on frequency shift keying and adopting CDMA technology. [0002] technical background [0003] In recent years, with the rapid growth of data service demands of mobile terminals, the bandwidth of signals has been continuously increased, and future wireless networks will be able to provide more ubiquitous mobile access. Currently in the field of wireless networks, existing short-range wireless communication technologies such as Wi-FI, Zigbee, Bluetooth and UWB play an important role in various applications. The development of demand for emergency relief communication networks in large communities or large commercial facilities, and high-speed data transmission between mobile robots requires highly intelligent mobile terminals in wireless networks, and the network is not only ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00H04J13/00H04L27/227H04W4/80
CPCH04J11/00H04J13/0055H04J2011/0006H04L27/227H04W4/80
Inventor 黄金城张雅恒曹瑞
Owner 东台城东科技创业园管理有限公司
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