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Spread spectrum communication system, idle channel estimating device and relevant method

A communication system and channel evaluation technology, applied in the field of spread spectrum communication, can solve the problem that the rake receiver 160 cannot be performed

Active Publication Date: 2014-08-20
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the signal detection quality can be improved by using the rake receiver 160, but if the clear channel assessment device 140 cannot successfully detect the packet in real time, the rake receiver 160 cannot perform subsequent actions

Method used

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  • Spread spectrum communication system, idle channel estimating device and relevant method
  • Spread spectrum communication system, idle channel estimating device and relevant method
  • Spread spectrum communication system, idle channel estimating device and relevant method

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Embodiment Construction

[0034] Certain terms are used in the description and claims to refer to particular elements. Those of ordinary skill in the art should understand that hardware manufacturers may use different terms to refer to the same element. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open-ended term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described herein that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0035] figure 2 It is a schematic diagram ...

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Abstract

A spread spectrum communication system comprising first and second antennas, first and second carrier demodulators, first and second analog-to-digital converters, first and second filters, clear channel evaluation means and selection device. These carrier demodulators respectively convert radio frequency signals into base frequency signals, and these analog-to-digital converters respectively convert these base frequency signals into digital signals. The filters respectively filter the digital signals to generate filtered signals. The idle channel estimation device generates a channel estimation signal and a path selection signal according to the signal characteristics of the filtered signals. The selecting device selectively outputs one of the filtered signals or does not generate any output according to at least one of the channel evaluation signal and the path selection signal.

Description

technical field [0001] The present invention relates to a spread spectrum (Spread Spectrum, SS) communication technology, especially a spread spectrum communication system, a clear channel assessment device and a related method that utilizes multiple receiving paths for clear channel assessment (CCA) detection. Background technique [0002] Spread spectrum is a communication technology that expands the spectrum of a transmission signal into a spectrum wider than its original bandwidth, and is often used in the field of wireless communication. The stricter definition is divided into two parts: one is that after spread spectrum modulation, the signal transmission bandwidth is much larger than the original signal; the other is that the transmission end will use a unique code (code), which is the same as the transmitted data Regardless, the receiving end must also use this unique code to despread to obtain the data at the transmitting end, and there are two common spreading meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/69H04L25/02
Inventor 林郁男张尹劭
Owner REALTEK SEMICON CORP