Channel quality indicator determining method and device and communication device

A technology for channel quality indication and determination method, applied in the field of channel quality indication determination method and device, and communication equipment, can solve the problems such as the inability to fully obtain the potential performance gain of nonlinear detection and poor precision.

Active Publication Date: 2017-09-29
SANECHIPS TECH CO LTD
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Problems solved by technology

However, if the above method of determining CQI is used for nonlinear detection, since it is difficult to accurately obtain the post-processing SNR of n

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  • Channel quality indicator determining method and device and communication device
  • Channel quality indicator determining method and device and communication device
  • Channel quality indicator determining method and device and communication device

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Embodiment Construction

[0053] In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.

[0054] For by M T transmit antennas and M R In a space division multiplexing MIMO system composed of two receiving antennas, the received signal y is determined by the following formula:

[0055] y=Hs+N

[0056] in, is the sending signal vector, each element in s contains Ω bits, s i = θ, θ is the constellation point set; is the received signal vector; H is M R × M T dimensional channel matrix; is a complex white Gaussian noise vector with variance σ 2 .

[0057] Such as figure 1 As shown, in the OFDM-MIMO receiving system, the wireless signal transmitted in ...

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Abstract

The embodiment of the invention discloses a channel quality indicator determining method and device and a communication device. The method comprises the steps of determining an equivalent channel matrix according to a received channel matrix and a precoding matrix; carrying out noise mean square error normalization on the equivalent channel matrix according to a received channel noise mean square error; carrying out orthogonal triangular decomposition on the normalized equivalent channel matrix and determining a decomposed upper triangular matrix; partitioning the upper triangular matrix according to master diagonal elements and non-master diagonal elements and determining a mutual information (MI) value of each layer; and calculating an average MI value of a code word according to the MI values of the layers and determining a CQI value of the code word based on the average MI value of the code word.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a channel quality indicator (CQI, Channel Quality Indicator) determination method and device, and communication equipment. Background technique [0002] Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) technology is a main method for improving spectrum efficiency in current wireless communications. Currently, new generation high-throughput wireless communication protocols such as 802.11n / ac, Long Term Evolution (LTE, Long Term Evolution) / Long Term Evolution-Advanced (LTE-A, Long Term Evolution–Advanced) systems have adopted this technology. Space division multiplexing is an important form of MIMO technology. Its basic idea is to decompose a multi-antenna channel into multiple independent parallel sub-channels, and send different data streams on these sub-channels to increase the transmission rate. However, the wireless channel for actual signal tran...

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Application Information

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IPC IPC(8): H04B7/06H04B7/0417
CPCH04B7/0417H04B7/0632H04B7/0639H04L1/00
Inventor 易立强
Owner SANECHIPS TECH CO LTD
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