Channel estimation method, device and receiver

Abstract

The invention is applied to the technical field of wireless communication, and provides a channel estimation method, a channel estimation device and a receiver. The method comprises the following steps of: calculating a channel frequency-domain response initial estimation valve of a subcarrier in which a received pilot signal is by a least square estimation algorithm; interpolating a data subcarrier between every two adjacent subcarriers and calculating a channel frequency-domain response interpolation estimation value of the interpolated data subcarrier; filtering the channel frequency-domain response initial estimation valve and the interpolation estimation value; and outputting the filtered channel frequency-domain response initial estimation valve and the interpolation estimation value. In the method and the device, when the channel frequency domain response interpolation estimation value of the interpolated data subcarrier is calculated, the quasi-real-time tracking and simple, efficient and accurate channel estimation of a wireless communication time-varying channel are realized by adopting the technology of origin shifting, quadrant-based phase adaptation, polar rotation route selection and the like, so high channel estimation performance can be achieved and simultaneously the algorithm complexity proximate to that of a linear interpolation method is still maintained.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a channel estimation method, device and receiver. Background technique [0002] Currently, in an actual wireless communication system, a receiver usually relies on accurate channel estimation (Channel Estimation, CE) to perform coherent demodulation and interference cancellation. Existing channel estimation methods mainly include Pilot-Aided Channel Estimation (PACE), Decision-Directed Channel Estimation (DDCE) and Blind Channel Estimation (BCE). [0003] Literature [Y.Li, N.Seshadri, S.Ariyavisitakul, "Channel Estimation for OFDM Systems With Transmitter Diversity in Mobile Wireless Channels", IEEE Journal on Selected Areas in Communications, vol.17, no.3, pp.461-471 , March 1999] introduced the Pilot Assisted Channel Estimation (PACE) method, which uses the known signal embedded in the signal (ie pilot) to complete the channel detection of the pilot ...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to propose a method for the existing channel estimation methods that require additional delay overhead, or signal detection errors, or slow convergence speed, or poor performance, or high computational complexity. Implements a simple, well-performing pilot-based channel estimation method

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