SISO balancing method based on sampling rate data and balancer

An equalization method and sampling rate technology, applied in baseband system components, shaping networks in transmitters/receivers, etc., can solve problems such as far immaturity, high computational complexity, high timing synchronization and carrier recovery quality requirements, etc. , to achieve the effect of improving performance and simplifying complexity

Active Publication Date: 2014-06-04
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

At present, domestic research and application in the field of adaptive equalization technology for aviation wireless communication data links are far from mature
However, the research and application in related fields abroad are currently mainly focused on the related algorithms of code rate and fractional time domain or frequency domain. Although they can achieve better converg

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  • SISO balancing method based on sampling rate data and balancer
  • SISO balancing method based on sampling rate data and balancer
  • SISO balancing method based on sampling rate data and balancer

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Example Embodiment

[0077] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0078] like figure 1 As shown, the embodiment of the present invention provides a kind of SISO equalization method based on sampling rate data, adopts following steps:

[0079] 1) Sampling the intermediate frequency analog data, and performing low-pass filtering and matching filtering on the sampled data to obtain equalized sampling rate data and input it into the equalizer;

[0080] 2) The equalizer calculates the equalizer filter tap coefficients according to the sampling rate data;

[0081] 3) Perform linear transverse filtering according to the equalizer filter tap coefficients to construct the "reverse channel" of the multipath fading channel to complete channel equalization;

[0082] 4) The equalizer outputs the equalized sampling rate data to the carrier synchronization loop to complete carrier tracking.

[0083] Specifically, in the step 1), the sl...

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Abstract

The invention discloses an SISO balancing method based on sampling rate data. The SISO balancing method comprises the following steps that (1) intermediate frequency simulation data are sampled, low-pass filtering and matched filtering are conducted on the sampled data, and the sampling rate data to be processed in a balancing mode are obtained and input into a balancer; (2) the balancer conducts balancer filtering tap coefficient calculation according to the sampling rate data; (3) linear transverse filtering is conducted according to the balancer filtering tap coefficients, an inverse channel of a multi-path fading channel is built, and channel balancing is achieved; (4) the balancer outputs a balancing result to a carrier synchronization loop to complete carrier tracking. According to the SISO balancing method based on the sampling rate data, the balancer is independent from a receiver digital baseband processing so as to be closer to be digital receiving processing front end, balance processing is not influenced by synchronization performance, and the contradiction that channel balancing, timing synchronization and carrier recovering are mutually restricted is solved.

Description

technical field [0001] The invention belongs to the wireless digital receiving technology of avionics information, is a method for realizing SISO self-adaptive equalization of sampling rate data of aeronautical wireless fading channels, and is applied in the field of aeronautical wireless communication data chains. technical background [0002] The digital signal reaches the receiving end through the transmission of the channel, but in fact the channel is a function with complex characteristics and is also time-varying. Therefore, the received signal has been severely distorted, resulting in intersymbol interference. The adaptive equalizer can compensate the distortion generated by the channel, and automatically adjust the tap coefficient of the equalizer according to the change of the received signal to track the time-varying characteristics of the channel. . [0003] In the UAV wireless communication data link baseband digital receiving system, the adaptive equalization p...

Claims

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Application Information

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IPC IPC(8): H04L25/03
Inventor 仇启明方正邹星金哲仕王白云彭文攀
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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