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Wireless channel feature estimation system

A channel estimation and wireless channel technology, applied in channel estimation, baseband system components, etc., can solve the problem that the requirements for accurate estimation and prediction of channel utilization are far from each other, and achieve the goal of filtering out multiple access interference, reducing complexity, and reducing consumption. Effect

Inactive Publication Date: 2019-01-04
10TH RES INST OF CETC
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Problems solved by technology

The estimation methods based on training sequences that have emerged in recent years are still far from the requirements for accurate estimation and prediction of channel utilization, and further efforts are needed

Method used

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Embodiment Construction

[0021] refer to figure 1 . In the embodiments described below, a system for estimating wireless channel characteristics includes a serial-to-parallel conversion module for receiving signals, a correlation operation module and a noise reduction module connected in series with the serial-to-parallel conversion module. The signal sending end sends a set of known serial pseudo-random PN sequences as the training sequence of the signal receiving end, and the signal receiving end converts the received serial pseudo-random sequence into parallel data through the serial-to-parallel conversion module , the correlation operation module performs a sliding correlation operation on the received pseudo-random sequence parallel data and the local pseudo-random sequence, and sends the obtained channel estimation initial value training sequence in the time domain to the noise reduction module for noise reduction processing; the noise reduction module first The initial value of the channel est...

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Abstract

The invention discloses a wireless channel feature estimation system, and aims to provide a channel estimation method characterized by low implementation complexity, low resource consumption, high estimation accuracy and low processing delay. The wireless channel feature estimation system is implemented by the technical scheme as follows: a signal sender sends a set of known pseudo-random PN sequences as training sequences; a signal receiver converts the serial data of the pseudo-random sequences into parallel data through a serial-parallel conversion module, and sends the parallel pseudo-random sequences to a correlation operation module; the correlation operation module carries out sliding correlation operation on the received pseudo-random sequences and local pseudo-random sequences toobtain the initial estimated value of channel feature information, and sends the initial value of channel estimation to a de-noising module; and the de-noising module calculates the noise intensity byusing the initial value of channel estimation, sets a reasonable noise threshold according to the noise intensity, and de-noises the initial value of channel estimation by using the noise threshold to obtain a final channel estimation value.

Description

technical field [0001] The invention relates to a technique for estimating channel characteristic information in the field of wireless communication, in particular to a time-domain channel estimation method for a wireless channel characteristic estimation system based on a pseudo-random sequence for rapidly obtaining channel characteristic information. Background technique [0002] The radio communication system is composed of three parts: sending equipment, receiving equipment, and wireless channels. It is a system that uses wireless electromagnetic waves to realize information and data transmission. The mobile communication system transmission equipment is composed of basic processing units such as encoding, modulation, multiple access and radio frequency (RF) transmission, and the receiving end is composed of basic processing units such as RF reception, addressing, demodulation and decoding. separated from each other. The wireless channel provides the connection between ...

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Application Information

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IPC IPC(8): H04L25/02
CPCH04L25/0204H04L25/024
Inventor 范琳琳
Owner 10TH RES INST OF CETC
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