Method and device for estimating channel

Abstract

The invention discloses a method and a device for estimating a channel. The method comprises the following steps of: presetting extracting multiple of at least two stages, and dynamically determining the current extracting multiple according to link quality; according to the current extracting multiple, extracting a received frequency domain demodulation reference mark and a local frequency domain demodulation reference mark; and figuring out the current frequency domain chain estimated value by using the extracted received frequency domain demodulation reference mark and the local frequency domain demodulation reference mark. The device comprises an extracting multiple judging module, a pilot frequency extraction module and a channel estimation module, wherein the extracting multiple judging module is used for presetting the extracting multiple of the at least two stages, and dynamically determining the current extracting multiple according to the link quality; the pilot frequency extraction module is used for extracting the received frequency domain demodulation reference mark and the local frequency domain demodulation reference mark according to the current extracting multiple; and the channel estimation module is used for figuring out the current frequency domain chain estimated value through the extracted received frequency domain demodulation reference mark and the local frequency domain demodulation reference mark. The method and the device have the advantages of reducing the complexity of a receiver and reducing the processing time delay.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a channel estimation method and device. Background technique [0002] With the rapid development of the global economy, personal communication devices have shown miniaturization and diversification, and the demand for data services such as multimedia messaging, online games, video on demand, music downloading, and mobile TV has increased significantly. Although the wireless performance of the third generation mobile communication system (referred to as 3G) network has been greatly improved, there are still many limitations in the fields of responding to market challenges and satisfying user needs. [0003] The LTE (Long Term Evolution) project is the largest new technology research and development project launched by 3GPP (3G technical specification organization) in the past two years, which improves and enhances the 3G air access technology. Compared with 3G, LTE has...

AI Technical Summary

Problems solved by technology

Although the wireless performance of the third generation mobile communication system (referred to as 3G) network has been greatly improved, there are still many limitations in the fields of responding to market challenges and meeting user needs.

However, on how to reduce receiver complexity and processing delay, the existing technology still has room for improvement

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