Channel estimation method, device and related detection system

Abstract

The invention discloses a channel estimation method, a device and a related detection system. The channel estimation method comprises the following steps: obtaining the channel parameter of a pilot frequency symbol in a DCT (discrete cosine transformation) domain; filtering the channel parameter in the DCT domain; carrying out IDCT (inverse discrete cosine transformation) on the filtered channel parameter; according to the decay coefficient of the channel frequency domain on a pilot frequency symbol position, obtaining the decay coefficient of the channel frequency domain on a data symbol. The channel estimation device comprises a module 1, a module 2, a module 3 and a module 4, wherein the module 1 is used for obtaining the channel parameter for the DCT domain of the pilot frequency symbol; the module 2 is used for filtering the channel parameter in the DCT domain; the module 3 is used for carrying out IDCT on the filtered channel parameter; and the module 4 is used for obtaining the channel parameter on the data sign position according to the channel parameter on the pilot frequency symbol position. The related detection system comprises the channel estimation device. In the embodiment of the invention, because DCT variation has the action of energy concentration, the channel parameter energy performed DCT variation is centralized in the front half part of a vector so as to change flat bottom effect to improve channel estimation performance.

Description

technical field [0001] The embodiments of the present invention relate to the communication field, and in particular to a channel estimation method, device and coherent detection system. Background technique [0002] In order to meet the increasing demands of future mobile communications on system capacity, spectrum utilization, data transmission rate, etc. In the LTE technology, the 3G air access technology is improved and enhanced, and the Orthogonal Frequency Division (OFDM) technology and Multiple Input Multiple Output (MIMO) technology are adopted to realize the ability to provide downlink 100Mbit / s and uplink under 20MHz spectrum bandwidth. The peak rate of 50Mbit / s improves the performance of cell edge users, increases cell capacity and reduces system delay. Among them, the MIMO technology can double the system capacity and spectrum utilization without increasing the bandwidth, and is more and more applied to the wireless communication system. OFDM technology is a r...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a channel estimation method and device to solve the problem of poor channel estimation performance in the prior art

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