Channel estimation method for WCDMA communication system

Abstract

This invention discloses a channel estimation method used in WCDMA system, first of all, de-scrambling and de-spreading the broadband spread spectrum signals input to the PAKE receiver, then de-spreading it by a spread code to get a special physical control channel and a specific physical data channel and then calculating the initial channel estimation value and using a mean algorithm to derive the channel estimation value Cem of the window corresponding time scale to the specific physical control channel symbol string of continued de-relational operation, finally outputting each multi-channel compensated result of the special physical data channel symbol corresponding to time scale m of CEm compensation window to the maximum-ratio-merge module so as to effectively increase the channel estimation accuracy under high speed mobile communication environment.

Description

technical field [0001] The invention relates to a channel estimation method of a wireless communication system, in particular to a channel estimation method of a wideband code division multiple access (WCDMA, Wide CDMA) communication system. Background technique [0002] With the rapid development of mobile communication, people have higher and higher requirements for the quality of mobile communication and the types of services it provides. The proposal and development of the third generation of mobile communication is exactly in line with this demand of people, so it has attracted much attention. . Wideband Code Division Multiple Access (WCDMA, Wide CDMA) is the third generation mobile communication system standardization organization (3 rd The Radio Transmission Technology (RTT) solution proposed by Generation Partnership Project (3GPP) can not only provide high-quality voice services, but also provide multimedia services similar to fixed networks. [0003] Such as fi...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art that the channel estimation value cannot reflect the channel characteristics in the case of channel deterioration, resulting in an increase in misjudgment rate and poor performance, in order to propose a method that can effectively improve performance in mobile communication environments, especially in mobile communication environments. It is the accuracy of channel estimation in high-speed mobile communication environment, so as to ensure the high-performance channel estimation method

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