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Programmable device based estimation and balancing apparatus and method for OFDM channels

A technology of orthogonal frequency division and channel multiplexing, which is applied in the field of high-speed applications and achieves the effect of strong practicability, strong practicability, and simple structure

Inactive Publication Date: 2009-05-27
南京市物联网与集成电路设计产业创新中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-speed but portable terminal hardware circuits required by these technologies will become one of the difficulties in realization

Method used

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  • Programmable device based estimation and balancing apparatus and method for OFDM channels
  • Programmable device based estimation and balancing apparatus and method for OFDM channels
  • Programmable device based estimation and balancing apparatus and method for OFDM channels

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Embodiment Construction

[0020] figure 2 and image 3 They are the overall circuit and the operation flow chart of the circuit of the present invention respectively. First, the channel estimation sequences and data streams arriving successively are divided into paths, and each path has its own indication signal. When the channel estimation sequence indication signal indicates that the channel estimation sequence arrives, the function of adding and shifting the shift adder is started; and when the data indication signal indicates that the data arrives, the cyclic shift function and the shift adder of the shift adder are started simultaneously. Pilot demodulation circuit, the pilot demodulation circuit outputs the frequency domain response of the channel that needs to be estimated and its indicator signal. Since the pilot demodulation module is delayed by four cycles, it is also necessary to delay the data flow by four cycles, so that the channel The frequency domain response and the data stream arriv...

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Abstract

This invention relates to programmable parts crossing multiplifier channel evaluation and its even device and method, wherein, the device is composed of router, displace adder and radio modulator and even device and the even method comprises the following steps: dividing the firstly arrived channel evaluation sequence and data flow each with indicator signal and starting displacement adder function when the indicator signal arrives and simultaneously start displacement adder recycle function and radio modulator circuit when the data indicator data arrive, wherein, the circuit output needs evaluated channel zone to respond to its indication signal to delay the data flow for four weeks to make the channel zone respond to the same one time of data flow.

Description

technical field [0001] The present invention is a kind of whole FPGA (Field Programmable Gate Array, programmable logic device) realization method of high-speed channel estimation and equalization algorithm suitable for OFDM (Orthogonal Frequency Division Multiplexer, Orthogonal Frequency Division Multiplexer) system based on training sequence, wherein Some subcircuits are also suitable for implementing high-speed applications with the same mathematical functions. Background technique [0002] OFDM technology has the advantages of high spectrum utilization rate, strong resistance to multipath effect, impulse noise and fast fading, and no need for linear equalization. It will become the next high-speed wireless communication technology, such as 3G, 4G mobile communication, or applicable It is the preferred technology for LAN, personal area network such as ultra-wideband (UWB) communication. However, high-speed but portable terminal hardware circuits required by these technol...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 张在琛欧细华毕光国徐平平
Owner 南京市物联网与集成电路设计产业创新中心有限公司