Low-complexity channel estimator based on the complex exponential BEM for a vector OFDM system

Peng, Zhuwei; Jiao, Chunxu; Zhu, Zhihuan; Zhang, Zhaoyang

doi:10.1109/wcsp.2016.7752745

Cited by 2 publications

(1 citation statement)

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“…It considers the time variation of each tap as a linear combination of given a few basis functions and makes the number of the channel parameters decrease from

N \times L

Q \times L

in each OFDM symbol, where N , Q and L denote the number of subcarriers, the number of the basis functions and the channel length, respectively. The choice of base functions can be selected as a polynomial group [ 13 ] , an exponent group [ 14 ] , the feature space base of the Doppler spectrum [ 15 ] , etc.…”

Section: Introductionmentioning

confidence: 99%

Fast Fading Channel Estimation for OFDM Systems with Complexity Reduction

Chen

2021

Chinese J of Electronics

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Channel estimation plays a significant role in the Inter‐carrier interference (ISI) mitigation and symbol detection in Orthogonal frequency division multiplexing (OFDM) systems. As the speed of mobile terminal increases, the channel changes rapidly, causing fast fading which will degrade the system performance. In this paper, a low complexity fast fading channel estimation method suited for scattered pilot OFDM systems is proposed. This method is characterized by estimating channel matrix directly in the frequency domain, which can significantly reduce the channel estimation complexity with good system performance. Simulation results verify its superiority over the existing estimation methods.

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“…It considers the time variation of each tap as a linear combination of given a few basis functions and makes the number of the channel parameters decrease from