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Detection method of detecting notch band and detection apparatus thereof

A detection method and detection device technology, applied in the direction of multi-frequency code systems, etc., can solve problems such as inability to decode correctly, high false alarm rate, and system performance degradation of multi-carrier communication systems

Inactive Publication Date: 2018-01-30
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a receiving end of the multi-carrier communication system cannot accurately detect the notch frequency band, it will not be able to correctly decode the signal transmitted by a transmitting end of the multi-carrier communication system, resulting in a decrease in the system performance of the multi-carrier communication system
[0003] The known technology has developed a notch frequency band detection method suitable for an Additive White Gaussian Noise (AWGN) channel, however, when the channel has serious multi-path effects (Multi-pathEffect), the known notch The frequency band detection method has a high false alarm rate (False Alarm Rate), which reduces the system performance of the multi-carrier communication system

Method used

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  • Detection method of detecting notch band and detection apparatus thereof
  • Detection method of detecting notch band and detection apparatus thereof
  • Detection method of detecting notch band and detection apparatus thereof

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Embodiment Construction

[0032] Please refer to figure 1 , figure 1 It is a schematic diagram of a detection device 10 according to Embodiment 1 of the present invention. The detection device 10 can be a receiving end of a multi-carrier communication system, the multi-carrier communication system operates in a wide frequency band, and the multi-carrier communication system can be a digital video broadcasting (Digital Video Broadcasting, DVB) system or a long-term evolution (Long Term Evolution, LTE) system and other communication systems. The detection device 10 can detect whether a received signal of the detection device 10 has a notch frequency band (Notch-Band) in a preamble sequence (Preamble) of the multi-carrier communication system. The detection device 10 includes a frequency conversion unit 100, an amplitude ( Magnitude) unit 102 and a judgment unit 104, the frequency conversion unit 100 receives a received signal x in a time domain (Time Domain), and converts the received signal x to a fre...

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Abstract

A detection method of detecting a notch band (Notch-Band) is applied to a multi-carrier communication (Multi-Carrier) system. The multi-carrier communication system is operated at a broadband. The detection method comprises the following steps of receiving a receiving signal, and according to the receiving signal, generating a plurality of frequency domain signals; carrying out magnitude operationon the plurality of frequency domain signals so as to acquire a plurality of amplitude values; and according to a plurality of specific values of a first group of amplitude values in the plurality ofamplitude values relative to a second group of amplitude values in the plurality of amplitude values, determining whether the receiving signal possesses the notch band.

Description

technical field [0001] The invention refers to a detection method and a detection device for detecting notch frequency bands, in particular to a detection method and detection device for accurately detecting notch frequency bands. Background technique [0002] The multi-carrier communication system has been widely used in daily life. The multi-carrier communication system can operate in a wide frequency band and has a high-speed transmission rate. However, in some specific cases, the multi-carrier communication system may have a notch-band (Notch-Band) in the broadband, that is, the multi-carrier communication system only transmits signals in the broadband outside the notch-band, and in the notch-band Signals are not transmitted within. If a receiving end of the multi-carrier communication system cannot accurately detect the notch frequency band, it will not be able to correctly decode a signal transmitted by a transmitting end of the multi-carrier communication system, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 魏逢时王堃宇廖懿颖赖科印童泰来
Owner MEDIATEK INC
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