System information sending and receiving method and device in digital audio broadcasting system
A technology for digital audio broadcasting and system information, which is applied in the directions of digital transmission systems, multi-frequency code systems, transmission path separation devices, etc. Coverage, improve the probability of correct decoding, improve the effect of frequency diversity gain
Active Publication Date: 2013-03-06
ACADEMY OF BROADCASTING SCI STATE ADMINISTATION OF PRESS PUBLICATION RADIO FILM & TELEVISION +1
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Benefits of technology
This patented technology ensures that transmitting data efficiently while reducing its size allows for flexibility in different types of communication networks like satellite radio reception (SAR), mobile phone radios, WiFi access points, LTE base stations, GSM cellular phones, Bluetooth devices, wired connections between components within these networked equipment, and other similar applications. It achieves this by providing multiple channels at once - one channel per frame - allowing more efficient use of available resources than traditional methods. Overall, it enhances signal quality even beyond what was previously possible due to increased redundancy provided through spread codes over time.
Problems solved by technology
This patented technical problem addressed by this patents relates to improving the efficiency and reliability of transmitting and receiving system information for use with different types of communication networks like Digital Audio Broadcasting or Data Services Networks (DDN). Current methods are limited because these protocols require long periods before being able to solve issues that could lead to connections failures between devices on both ends of each network segment.
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] The digital audio broadcasting system described in the embodiment of the present invention is a digital audio broadcasting system based on Coded Orthogonal Frequency Division Multiplexing (COFDM).
[0026] figure 1 It is a schematic diagram of the system information sending device in the digital audio broadcasting system of the present invention. see figure 1 , the sending device includes:
[0027] A cyclic redundancy check (CRC) encoder is used to input system information, perform cyclic redundancy check encoding, generate system codes including system information and check information, and output them to the channel encoder;
[0028] A channel encoder, configured to search for a corresponding encoded codeword in the codeword set according to the input systematic code, generate an encoded bit stream including redundant informa
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The invention discloses a system information sending and receiving method and device in a digital audio broadcasting system. The method comprises the following steps of: when in sending, performing CRC (cyclic redundancy check) coding and channel coding on the system information to generate a coding bit stream; performing bit interleaving and constellation mapping on the coding bit stream to obtain a continuous pilot frequency including the system information; multiplexing a continuous pilot frequency signal with other signal elements of the system to obtain a frequency-domain signal of an orthogonal multiplexing structure according to a carrier allocation method stipulated by a frequency spectrum mode; converting the frequency-domain signal into a time-domain signal for sending; when in receiving, converting the time-domain signal into a frequency-domain signal; extracting the continuous pilot frequency including the system information from an effective carrier of the frequency-domain signal according to the position stipulated by the frequency spectrum mode; obtaining an estimated value of the system information through de-mapping, de-interleaving and channel decoding; and judging the correctness of the system information by use of CRC decoding, and outputting the system information. The method and device disclosed by the invention can improve the transmission robustness on the basis of guaranteeing the transmission efficiency of the system information.
Description
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