Information feedback method and system based on space, time and frequency domain, customer equipment and base station

Abstract

The invention relates to a method for feeding information back on the basis of space time frequency domain, a system, a user device and a base station thereof, which are used in the technical field of wireless transmission, the user device in the invention measures and estimates the quality of a wireless transmission chain circuit of a downlink MIMO system, information such as order, pre-coding matrix key number, communication channel quality indication and the like of the downlink wireless transmission chain circuit is obtained, the selecting characteristics of the communication channel in three dimensional space of spatial domain, frequency domain and time domain are utilized to process the information of the downlink wireless transmission chain circuit in the spatial domain, the frequency domain and the time domain respectively, a feedback method which is used effectively and simply is used to transmit the information of the downlink chain circuit to the base station, the base station optimizes a transmitter according to the information which is fed back by the user device, and thereby the purpose of improving the whole data throughput of a wireless district and the data throughput of the district edge under the precondition that the service quality of the wireless district is considered is achieved.

Description

technical field [0001] The present invention relates to an information feedback method and system for wireless communication, in particular to an information feedback method and system based on space-time-frequency domain three-dimensional space in a downlink multiple-input multiple-output (MIMO) system, a user equipment and a base station for wireless field of transmission technology. Background technique [0002] In recent years, wireless services have developed extremely rapidly, and the number of users has also increased exponentially. However, the main challenge facing wireless services is still whether wireless services can provide high-speed and high-performance services. OFDM) technology and multiple-input multiple-output antenna (MIMO) technology are used to increase the capacity of the wireless cell, so the overall data throughput and edge data throughput of the wireless cell become important indicators for measuring the service quality of the wireless cell. IMT20...

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Problems solved by technology

[0004] South Korea's Samsung Corporation published a proposal R1-070133 at the 47th meeting of 3GPP TSG RAN1 held in Sorrento, Italy from January 15 to 19, 2007, titled "The MIMO System of Frequency-Variable Particles Feedback by UE". Performance (MIMO System Performance with Variable Frequency Granularity of UE Feedback), this proposal proposes the mapping relationship between the rank (Rank), layer (Layer), codeword (Codeword) of the MIMO system and the CQI feedback method, but the proposal does not The characteristics of the channel in the air domain, frequency domain, and time domain are not considered, that is, the selectivity of the channel in the space-time-frequency three-dimensional space is not fully utilized. Therefore, there is also the possibility of further reducing the amount of CQI feedback

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