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Signal processing method, device and China mobile multimedia broadcasting system

A signal processing device and multimedia broadcasting technology, applied in the field of communication, can solve the problem of low system gain and achieve the effect of improving channel gain

Active Publication Date: 2016-03-16
SPACE STAR TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] In view of this, the present invention provides a signal processing method, device and China Mobile multimedia broadcasting system to solve the problem of using selective combining technology to select a stronger channel when combining multiple signals at the receiving end in the prior art. The signal is used as the final accepted signal, which leads to the problem that the system gain is relatively low. The technical solution is as follows:

Method used

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  • Signal processing method, device and China mobile multimedia broadcasting system
  • Signal processing method, device and China mobile multimedia broadcasting system
  • Signal processing method, device and China mobile multimedia broadcasting system

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Embodiment Construction

[0063] For reference and clarity, descriptions, abbreviations or abbreviations of technical terms used in the following text are summarized as follows:

[0064] CMMB, ChinaMobileMultimediaBroadcasting, China Mobile Multimedia Broadcasting System;

[0065] FFT: FastFourierTransformation, Fast Fourier Transformation;

[0066] LDPC: LowDensityParityCheckCode, low density parity check code;

[0067] OFDM: Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing technology;

[0068] MMSE: minimum mean square error;

[0069] ML: MaximumLikelihood, maximum likelihood detection.

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other em...

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Abstract

The embodiment of the invention provides a signal processing method, a device and a China mobile multimedia broadcasting system. By adopting the method, the device and the system provided by the embodiment of the invention, a broadcasting signal and a distribution signal which are two received independent signals are compensated, a maximum ratio combining technique is adopted for combination and output, the defect that diversity gain is relatively low when a selective combining technique is adopted in the case of diversity combining in the prior art to select a strong path of signals to be outputted can be overcome, and the purpose of improving the channel gain is realized.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically relates to a signal processing method, device and China Mobile multimedia broadcasting system. Background technique [0002] In the mobile communication system, the mobile communication channel is a multi-path fading channel, and the transmitted signal must go through multiple propagation paths such as direct radiation, reflection and scattering to reach the receiving end. ), the signal burden, time delay and phase of each propagation path change anytime and anywhere, therefore, the level fluctuation of the signal received by the receiver is unstable, and the multipath signals of different phases are superimposed on each other. cause multipath fading. [0003] In the process of realizing the invention, the inventor found that diversity reception is usually used to overcome multipath fading. Using this method, multiple signals that carry the same information a...

Claims

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Application Information

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IPC IPC(8): H04B7/12H04L27/00
CPCH04B7/12H04L27/0004
Inventor 李京娥杨博刘江春赵诚段鹏婷席超
Owner SPACE STAR TECH CO LTD
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