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Time domain channel estimation method and time domain channel estimation device

A time-domain channel estimation and time-domain technology, applied in the field of optical communication, can solve the problem of reducing the accuracy of channel estimation

Active Publication Date: 2017-03-22
ZTE CORP +1
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  • Application Information

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Problems solved by technology

This method is simple in principle and low in complexity, but in long-distance transmission, the residual error component caused by the accumulation of dispersion and polarization film dispersion will seriously reduce the accuracy of channel estimation

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  • Time domain channel estimation method and time domain channel estimation device
  • Time domain channel estimation method and time domain channel estimation device
  • Time domain channel estimation method and time domain channel estimation device

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Embodiment Construction

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0062] The basic idea of ​​the embodiment of the present invention is: using the characteristics of the optical channel and the time-domain transmission equation of the polarization multiplexing OFDM / OQAM system obtained by OFDM / OQAM technology and the distribution of noise to obtain the relevant parameters of the noise at the receiving end, and then The response coefficient of the time-domain transmission channel is estimated according to the weighted minimum mean square error algorithm, and then channel equalization can be performed by estimating the obtained time-domain transmission channel response coefficient, thereby demodulating the OFDM / OQAM signal transmitted by the transmitter.

[0063] In the embodiment of the present invention, the transmitting end performs phase mo...

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Abstract

The invention discloses a time domain channel estimation method and a time domain channel estimation device. The time domain channel estimation method comprises steps that a receiving end is used to receive an association relation between the receiving signal of the receiving end and a transmitting signal of a transmitting end in a time domain after demodulating a received orthogonal frequency-division multiplexing / offset quadrature amplitude modulation OFDM / OQAM signal; the receiving end is used to acquire statistic of receiving signal noises according to the association relation and a preset noise distribution characteristic; the receiving end is used to acquire the tap coefficient of the time domain channel according to the statistic of the receiving signal noises and the association relation; and the tap coefficient corresponding to the time domain channel is used to express the time domain channel of the transmitting signal from the transmitting end to the receiving end.

Description

technical field [0001] The present invention relates to optical communication technology, in particular to a method and device for channel estimation in time domain. Background technique [0002] In optical communication, the combination of Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology and high-order modulation format can effectively resist the effects of dispersion and partial positive mode dispersion, and has high spectral efficiency; and Orthogonal Frequency Division Multiplexing / Offset Quadrature Amplitude Modulation (OFDM / OQAM, Orthogonal Frequency Division Multiplexing / Offset Quadrature Amplitude Modulation) is an improved version of OFDM technology, which replaces the OFDM technology by using a specially designed filter bank. Cyclic prefix and cyclic suffix are used to combat dispersion and polarization film dispersion, which improves the spectral efficiency compared with traditional OFDM; moreover, since the ...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L27/26
Inventor 张帆廖屏方熙徐永驰费爱梅
Owner ZTE CORP
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