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A multi-carrier adaptive demodulation method based on resource multiplexing

A technology of resource multiplexing and demodulation method, which is applied in the field of multi-carrier adaptive demodulation based on resource multiplexing, and achieves the effect of high resource multiplexing rate and variable rate

Active Publication Date: 2016-06-01
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0005] The technical problem solved by the present invention is to overcome the deficiencies of the prior art, provide a multi-carrier adaptive demodulation method based on resource multiplexing, and solve the multi-carrier autonomous demodulation method of satellites in the Ku / Ka frequency band with very small resource consumption. On-board Realization Problems in Adapting to Communications

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  • A multi-carrier adaptive demodulation method based on resource multiplexing
  • A multi-carrier adaptive demodulation method based on resource multiplexing
  • A multi-carrier adaptive demodulation method based on resource multiplexing

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Embodiment Construction

[0028] Taking 8 carriers as an example below, the present invention will be further introduced in conjunction with the accompanying drawings.

[0029] like figure 1 As shown, the multiplexing of 8 carriers is realized through FIFO, and each channel stores its important intermediate parameters in the FIFO, and which channel to be processed will continue to process on the basis of the read parameters. The parameters to be cached in each channel in FIFO1 are Addr_best (the input data address to start processing), Part_num (the number of output blocks), Channel_index (the number of each carrier, ranging from 0 to 7), Flag (the flag of whether the capture is successful, '1' represents successful capture), Burst_type (burst type, '0' represents data burst, '1' represents ranging burst), Demola (for the 128-bit sequence related to the preamble), the preamble head for figure 2 Capture and synchronization sequence in .

[0030] The overall process is as follows:

[0031] 1) Read o...

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Abstract

The invention discloses a resource reuse-based multi-carrier adaptive demodulation method. The method mainly comprises the following steps: inputting a plurality of paths of serial data to cache; caching each carrier intermediate variable; capturing a header; performing bit timing deviation estimation; interpolating a trigonometric function; performing coordinate transformation; inputting amplitude and phase data to cache; caching each carrier intermediate variable; performing initial frequency deviation and phase deviation estimation; performing RM decoding and carrier tracking algorithm processing. According to the method, universal design for adaptive demodulation on a variable-rate and multiple-modulation-mode burst multi-carrier signal is realized. The problem of serious rain fade during multi-carrier wireless transmission of a satellite at the Ku / Ka frequency band, the problem of different data transmission requirements for various types of communication terminals and the problem of requirements of multi-carrier anti-interference communication of a communication satellite system are solved.

Description

technical field [0001] The invention relates to a multi-carrier adaptive demodulation method based on resource multiplexing. Background technique [0002] Satellite communication has the characteristics of wide coverage, long communication distance, large communication capacity and good transmission quality, and has become an important means of communication. Due to the increasingly busy satellite communication business and the rapid increase in communication capacity, the radio frequency spectrum is very crowded. In order to solve the problem of shortage of spectrum resources, satellite communication is developing towards the high-frequency band of Ka (20 / 30GHz) and above with broad prospects. Combined with the diversified requirements of communication types, the application of satellite communication systems in the Ka and above frequency bands has the following problems to be solved: 1) The serious problem of rain attenuation when satellites perform multi-carrier wireless ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
Inventor 田嘉龚险峰惠腾飞张剑王大庆
Owner XIAN INSTITUE OF SPACE RADIO TECH
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