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Single carrier frequency domain equalization ultra-wideband system channel estimation method

A single-carrier frequency domain, channel estimation technology, applied in baseband system components, shaping network in transmitter/receiver, etc., can solve narrowband interference and other problems, and achieve the effect of improving accuracy

Inactive Publication Date: 2015-01-21
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a single-carrier frequency-domain equalization ultra-wideband system anti-narrowband interference channel estimation method to solve the narrow-band interference problem existing in the current single-carrier frequency domain equalization ultra-wideband system channel estimation

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Embodiment Construction

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] The SC-FDE UWB system structure that the present invention adopts is as follows figure 1 As shown, at the transmitter, data symbols are first inserted between blocks with a cyclic prefix (Cyclic Prefix, CP) whose length is greater than the maximum multipath delay to eliminate inter-block crosstalk. After framing is completed, noise and interference are added through the ultra-wideband channel After arriving at the receiving end, at the receiving end, remove the CP, perform FFT processing, channel estimation and equalization on the signal, and then transform back to the time domain demodulation through the IFFT operation to obtain the original data symbols.

[0029] The present invention assumes perfect synchronization of reception and that the channel does not change within each data block. At the receiving end, the received signal c...

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Abstract

The invention relates to a single carrier frequency domain equalization ultra-wideband system channel estimation method and belongs to the technical field of an ultra-wideband communication system. The method is characterized by, to begin with, carrying out estimation on a single carrier frequency domain equalization ultra-wideband system by utilizing least square estimation; then, carrying out wavelet modulus maximum dynamic threshold calculation based on the estimation; detecting the position of narrow-band interference; and finally, recovering frequency response of a channel at the interference position through an interpolation method. Through the steps above, the method helps to improve the precision of channel estimation and the detection probability of the narrow-band interference, and further prove that the channel estimation method in the invention is superior to the LS channel estimation and wavelet modulus maximum threshold channel estimation through a simulation experiment.

Description

technical field [0001] The invention relates to a channel estimation method for a single-carrier frequency domain equalization ultra-wideband system, belonging to the technical field of ultra-wideband communication systems. Background technique [0002] UWB has attracted more and more attention in recent years because of its high data transfer rate and low power consumption. The power of UWB system signal is very low and occupies a wide frequency band, which enhances the frequency selective fading of the channel. UWB (Multi-band Orthogonal Frequency Division Multiplexing, MB-OFDM) based UWB ( Ultra-wideband, UWB) system can effectively suppress channel frequency selective fading, but has a high peak-to-average ratio, and is very sensitive to timing errors and carrier frequency synchronization [1] . The Single Carrier Frequency Domain Equalization Ultra-wideband (SC-FDE UWB) system adopts single carrier block transmission, which can not only effectively suppress the frequen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03
Inventor 王丹李艳红张士杰陈艳杰甘立记
Owner HENAN UNIV OF SCI & TECH
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