Method, user equipment and system for reducing feedback quantity of pre-coding matrix index number

Abstract

Disclosed is a method of reducing precoding matrix index number feedback quantity, a user equipment and a communication system, used for the technical field of wireless transmission. The user equipment of the invention adopts the corresponding feedback mode of the precoding matrix index number according to different frequency selective characteristics of the channel, feeds back the precoding matrix index number of the whole bandwidth and the precoding matrix index number of the selected sub-band; the user equipment feeds back the sub-band serial number required to feed back, the channel quality indication information and the precoding matrix index number to a base station through an up link; the base station performs transmitter optimization according to the information fed back by the user equipment, thereby increasing the performance of the system under the premise of compromising the service quality of the wireless district. The invention provides an information feedback method of reducing precoding matrix index number feedback quantity in the up link, performs feedback with high efficiency and simpleness on the information of the down link through unique method, thereby reducing air cost in the up link, saving frequency spectrum resource and increasing the system performance.

Description

technical field [0001] The invention relates to an information feedback method for wireless communication, which can reduce the feedback amount of a precoding matrix index number in an uplink, and is used in the technical field of wireless transmission. Background technique [0002] With the rapid development of wireless services, the number of user equipment has also increased exponentially, but the main challenge faced by wireless services is still whether wireless services can provide high-speed and high-performance services for a large number of user equipment. Cross-Frequency Division Multiplexing (OFDM) technology and Multiple Input Multiple Output Antenna (MIMO) technology are used to increase the capacity of wireless cells. Therefore, improving the data throughput of the wireless cell becomes an important index to measure the service quality of the wireless cell. The IMT2000 standardization in the 3rd Generation Partnership Project (3GPP) has considered adopting MIM...

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Problems solved by technology

However, this proposal does not consider the characteristics of the channel in the air domain and frequency domain, that is, the correlation between the channel in the air domai

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