Method and device for processing 802.11 noise signal
A noise signal and signal technology, applied in the field of 802.11 noise signal processing and devices, can solve the problems of digital baseband processor mishandling, missing frame header, missing effective frame demodulation and decoding, etc.
Active Publication Date: 2013-03-06
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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[0002] The physical layer signals transmitted through radio frequency modulation and propagated through the air channel will inevitably introduce noise and interference. When these signals are demodulated by radio frequency and converted by ADC, noise will also be introduced into the digital baseband processor. The existence of these noises will cause the digital baseband processor to mishandle the AGC adjustment and frame header detection, which will eventually lead to missing the frame header of the valid signal, thus missing the demodulation and decoding of the valid frame
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0026] Such as figure 2 As shown, according to the specific implementation method, the following steps are included:
[0027] Step 201, continuously calculate the energy of the 0.8us signal, and when it is greater than the threshold, the energy detection is successful; at the same time, the signal and the local sequence continue to perform a cross-correlation operation for a certain period of time to realize the correlation sequence detection function, if it is greater than the corresponding threshold, then Related sequences detected successfully. If the energy detection is first detected successfully, the related sequence detection will be blocked. Conversely, if the related sequence detection is successfully detected first, the energy detection will be blocked. If the simultaneous detection is successful, only the result of the successful energy detection will be...
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The invention provides a method and device for processing mis-starting of automatic gain control (AGC) adjustment and frame head detection of an 802.11 noise signal. The 802.11 noise signal is sent to a digital baseband receiver to be processed after being subjected to radio frequency receiving demodulation and analog-to-digital conversion (ADC); after a frame head part is subjected to energy detection or relevant sequence detection, corresponding AGC adjustment and frame head detection operation are started; and after the AGC adjustment and the frame head detection are successfully executed, the corresponding demodulation decoding of the baseband receiver is started. In order to prevent mis-starting of the AGC adjustment and the frame head detection of a frame head, which is caused by noise, energy judgment needs to be carried out and a corresponding restarting mechanism needs to be started, so that the frame head can be accurately and effectively processed and a phenomenon the effective frame heads are missed is avoided; the baseband receiving demodulation efficiency is improved; and therefore, the aim of improving the system throughput is fulfilled.
Description
technical field [0001] The invention relates to the processing technology for the frame head of the 802.11 received signal. Background technique [0002] The physical layer signals transmitted through radio frequency modulation and propagated through the air channel will inevitably introduce noise and interference. When these signals are demodulated by radio frequency and converted by ADC, noise will also be introduced into the digital baseband processor. The existence of these noises will cause the digital baseband processor to mishandle in the links of AGC adjustment and frame header detection, which will eventually lead to missing the frame header of valid signals, thereby missing the demodulation and decoding of valid frames. [0003] In order to solve this problem, some necessary noise signal processing mechanisms should be introduced in the frame header processing link to ensure timely and efficient reception of valid signals. Such as figure 1 shown. [0004] exist ...
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IPC IPC(8): H04L1/00H04L27/26
Inventor 廖峰邹锦芝潘杰邬泳
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD