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Channel estimating and balancing apparatus for time domain known array OFDM system and method thereof

A time-domain channel estimation and channel estimation technology, which is applied in multi-frequency code systems, baseband system components, and shaping networks in transmitters/receivers, etc., can solve instability, channel changes cannot be too fast, and data discontinuity and other problems to achieve the effect of meeting the requirements and not having high complexity

Inactive Publication Date: 2007-01-31
SHANGHAI JIAO TONG UNIV
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Benefits of technology

This invention allows for efficient use of radio frequency (RF) signals by estimating channels accurately without being too complex or expensive compared to traditional methods like time-consuming measurements.

Problems solved by technology

This patented technical solution describes different techniques for improving the reception quality of radioactive materials like radium rays during their transportation over long distances without causing interference from adjacent sources. These include Time Division Multiplex Access (TDMA)-based Intermediate Receiver Spatial Audio Broadcast/Multicast Transmission System (ISDBSS). Additionally, Digital Video Multimedia Interface Overall, these technologies aim to improve the reception capabilities of Radioactive Material Transport Centers (RTCCC) equipment in both indoor and outdoor scenarios.

Method used

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  • Channel estimating and balancing apparatus for time domain known array OFDM system and method thereof
  • Channel estimating and balancing apparatus for time domain known array OFDM system and method thereof
  • Channel estimating and balancing apparatus for time domain known array OFDM system and method thereof

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Embodiment Construction

[0036]Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0037] figure 1 is a schematic diagram of a time domain training estimation frequency domain equalization device according to a preferred embodiment of the present invention, such as figure 1 As shown, the channel estimation and equalization device according to the preferred embodiment of the present invention includes: a data separator 10, and the input data processed by it is as follows Figure 4 The OFDM symbol of the shown frame structure, this symbol structure includes the frame header part that time domain known sequence forms and a DFT data frame body part, and data splitter 10 separates the received signal into time domain known sequence and DFT The data frame body, its input terminal is connected with the A / D conversion module at the front end of the receiver, one of its output terminals outputs a known signal in the time domain...

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Abstract

The invention is a time-domain known sequence inserted OFDM-based channel estimating and balancing device, applied to handheld mobile digital multimedia terminals, comprising: data separator, separating the received signal into time-domain known sequence and DFT data frame; time-domain known sequence interference eliminating unit, making reconstruction and circular convolution on the received data according to the obtained channel impulse response; time-domain channel estimating unit, obtaining the channel impulse response and sending it to frequency- domain balancing unit; local time-domain known generator unit, generating local time-domain known sequence; FFT unit; frequency-domain balancing unit, implementing frequency-domain balance. And the device can implement channel estimation and reception of a system with high spectrum utilization ratio and has not high complexity, and can meet the requirements of handheld mobile equipment.

Description

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Claims

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Application Information

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Owner SHANGHAI JIAO TONG UNIV
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