Method for mapping down special pilot frequency and physical resource block of long loop prefix frame structure

Abstract

The invention relates to a mapping method of specific downgoing pilot frequency with long-circulating front frame structure and physical resource block. The method comprises: the first specific downgoing pilot frequency at each path is mapped to the specific location of the physical resource block, the frequency domain position thereof is set as the same sub-carrier of the common pilot frequency at the first column of the physical resource block; other specific downgoing pilot frequencyes of the path are mapped according to the time domain interval, the frequency domain interval and the predetermined rule; the time domain interval is two or three orthogonal frequency division multiplex symbols, and the frequency domain interval is two sub-carrier with the same time domain. The method clarifies the position of the pilot frequency symbol in the physical resource block, and solves the problem which is unable to obtain the entire signal channel information by the common pilot frequency inthe existing LTE standard version when the base-station terminal is formed by the wave beam of more than four antennas, and enables the signal channel information obtained by the specific pilot frequency to contain the true signal channel information and the processing weight formed by the wave beam, enables the terminal to form the transmission weight without obtaining the specific wave beam, thereby avoiding the feedback spending of the wave beam to form weight.

Description

technical field [0001] The present invention relates to wireless communication, in particular to a method for mapping downlink dedicated pilots and physical resource blocks in a long cyclic prefix CP frame structure in a long term evolution system (Long term evolution, LTE for short). Background technique [0002] In the current version of the LTE (Long term evolution, long-term evolution system) standard 3GPP (3rd Generation partnership project, third generation mobile communication partnership project) TR 36.211, the beamforming technology supporting single stream is specified, in order to distinguish beamforming and Precoding also clarifies the condition that beamforming is applied to the number of antennas greater than or equal to four. However, only four common pilots are defined in the current version of the LTE standard, so only four common pilots are used in practice, and the channel information of each antenna port is extracted from the corresponding common pilot. ...

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, in the current version of the LTE standard, when the base station uses beamforming with more than 4 antennas, the common pilot cannot obtain all channel information, and there is a problem of feedback overhead of beamforming weights. A kind of New mapping method of downlink dedicated pilot and physical resource block

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