A Channel Estimation Method

A channel estimation and channel technology, applied in the information field, can solve problems such as unreliable terminal communication, and achieve the effects of low bit error rate, simple hardware, and high accuracy

Inactive Publication Date: 2015-11-18
SUZHOU UNIV
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Problems solved by technology

The sending terminal adopts a fixed channel model for source coding. Due to the change of channel performance, the received signal of the receiving terminal will be distorted, and the communication between terminals cannot be carried out reliably.

Method used

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Embodiment Construction

[0019] see figure 1 As shown, a channel estimation method includes a signal sending terminal, a communication channel and a signal receiving terminal, including the following steps:

[0020] Step 1) The signal sending terminal includes a composite signal generation module, a modulation module, a demodulation module, and a module for determining a high-speed channel of multiple tones of interest frequencies, and the communication channel includes a high-rate channel and a low-rate channel, and the signal According to the agreement with the signal receiving terminal, the sending terminal generates a composite signal of a plurality of frequency tones of interest through the composite signal generation module of the multiple frequency tones of interest, and is modulated by the modulation module and passed through the high The rate channel is sent to the signal receiving terminal;

[0021] Step 2) The signal receiving terminal includes a demodulation module, a Goertzel algorithm m...

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Abstract

The invention discloses a channel estimation method comprising the following steps of: transmitting a monophonic composite signal with a plurality of interested-frequencies by a signal transmitting terminal according to the promise between the signal transmitting terminal and a signal receiving terminal; rapidly calculating the frequency spectrum of the received signal by using a Goertzel algorithm after the signal receiving terminal receives the composite signal; then, selecting a most correlative experience channel model as a communication channel model after correlation analysis is carried out on all experience channel models; and feeding the selected channel model back to the signal transmitting terminal, wherein the channel model is selected by the signal receiving terminal. Thus, a transmitting signal is pre-emphasized by the signal transmitting terminal according to the selected channel model before transmission to offset channel distortion, and furthermore, the signal receiving reliability of the signal receiving terminal is improved. Channel estimation is realized by using the Goertzel algorithm and a correlation calculation method, so that the channel estimation method is low in calculated quantity, high in speed, high in channel estimation accuracy rate, simple in hardware and easy to be integrated with other communication terminals.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a channel estimation method. Background technique [0002] With the widespread application of mobile devices, the performance of communication channels between various terminals will change as the terminals move. The information sending terminal adopts a fixed channel model for source coding. Due to the change of channel performance, the signal received by the receiving terminal will be distorted, and the communication between terminals cannot be carried out reliably. Contents of the invention [0003] In order to solve the above problems, the present invention provides a channel estimation method with small calculation amount, high speed and high accuracy of channel estimation. [0004] In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the notification system of the sample processing plant is realized by the follo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L25/02
Inventor 胡剑凌胡丹峰曹洪龙
Owner SUZHOU UNIV
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