Data transmitting, receiving method and apparatus for MIMO system

Abstract

An embodiment of the invention discloses a multi-input multi-output system data transmission method, a receiving method and a device thereof, wherein the data transmission method comprises the following steps: executing channel coding to the data information, interweaving, modulating and preprocessing the data information; and transmitting the data information which is executed with channel coding, interweaving, modulating and preprocessing to each receiving end, wherein the data information to be transmitted to each receiving end is interweaved respectively with different interweaving patterns. The receiving method comprises the following steps: receiving data information and interweaving pattern information; normally processing the data information; determining whether the data information which is processed normally passes through a CRC checking, if yes, obtaining the data information which is processed normally; and if not, executing iteration processing and then obtaining the data information. The embodiment of the invention can reduce the performance reduction caused by multi-user interference between the receiving ends of multi-input multi-output system thereby improving the capability of system.

Description

technical field [0001] The invention relates to the communication field, in particular to a data sending and receiving method and device for a multiple-input multiple-output system. Background technique [0002] MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) technology is widely used in the next generation of mobile communication systems due to its many advantages of effectively improving the system capacity, better diversity performance and interference suppression, such as in MIMO technology has been or will be introduced into the multi-antenna digital communication system of 3G (The 3rd Generation Mobile Communication System, third generation mobile communication system) / 4G (The 4th Generation Mobile Communication System, fourth generation mobile communication system). MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, respectively, and signals are transmitted and rec...

AI Technical Summary

Problems solved by technology

However, since there is no direct communication between users in the MU-MIMO system, each user only selects the precoding matrix that the user thinks is optimal according to the local CSI, and it is difficult to guarantee the selected precoding matrix. The strongest one also minimizes the interference of the user's signal to other users, so it is difficult to avoid MAI between multiple users for codebook-based MU-MIMO

[0006] The receiver uses conventional receiver techniques, such as Linear Minimum Mean-Squared Error (L-MMSE), Zero-Forcing (ZF), Maximum Likelihood Detection (MLD), serial Interference cancellation (Successive Interference Cancellation, SIC), etc., even in a channel environment with a high SNR (Signal to Noise Ratio, signal to noise power ratio), the receiver can only eliminate or suppress the signal fading caused by the channel environment, while Cannot eliminate MAI among multiple users

Therefore, there is still room for further improvement in the performance of the existing MU-MIMO system

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