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Method and device for HARQ in MIMO space multiplexing system

A technology of spatial multiplexing and spatial diversity, applied in the field of HARQ in MIMO spatial multiplexing system, can solve the problems of high transmission success, inability to transmit correctly, and poor data stream channel quality, so as to improve retransmission gain and improve retransmission performance. , the effect of reducing the average number of retransmissions

Inactive Publication Date: 2009-04-01
ZTE CORP
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Problems solved by technology

[0005] In a multiple data stream spatial multiplexing MIMO system, each data stream has its own HARQ process. In a precoded MIMO communication system, there are certain performance differences among multiple data streams sent at the same time. Some of the data streams are due to The channel condition is good, and the probability of successful transmission is high, while other data streams cannot be transmitted correctly even after multiple retransmissions due to poor channel quality, and the performance of these streams has a crucial impact on the total throughput of users

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  • Method and device for HARQ in MIMO space multiplexing system
  • Method and device for HARQ in MIMO space multiplexing system
  • Method and device for HARQ in MIMO space multiplexing system

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0023] figure 1 It is a flow chart of the HARQ method in the MIMO spatial multiplexing system according to the present invention.

[0024] Such as figure 1 As shown, the method includes the following steps:

[0025] S102. After sending multiple independent data streams, select one or more data streams to be retransmitted according to information fed back by the user equipment; and

[0026] S104. Independently code and modulate the selected one or more data streams that need to be retransmitted, and send them in a space diversity manner.

[0027] According to the method of the present invention, after using the space diversity method to send, it also includes: sep...

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Abstract

The invention provides a method of HARQ in a MIMO spatial multiplexing system. The method comprises the following steps: after a plurality of independent data streams are transmitted, one or a plurality of data streams requiring re-transmission are selected according to information fed back by user equipment; the selected one or a plurality of data streams requiring re-transmission are subject to independent coding modulation respectively, and are transmitted by the mode of space diversity. The invention also provides a device of HARQ in the MIMO spatial multiplexing system, which comprises an information source module, one or a plurality of modulators and one or a plurality of coders, as well as a selective re-transmission control module and a diversity re-transmission module. Therefore, by adopting the method and the device, re-transmission gain of error data stream can be improved by space time-frequency selective diversity re-transmission, average re-transmission times of the system can be reduced, and throughput of the system can be improved.

Description

technical field [0001] The present invention relates to a broadband wireless communication system, and more particularly, to a method and device for HARQ in a MIMO space multiplexing system. Background technique [0002] The Multiple Input Multiple Output (MIMO) system refers to a wireless communication technology that uses multiple antennas at the transmitting end and the receiving end, which can effectively improve the capacity, link performance and coverage of the wireless network. It can also effectively utilize random fading and possible multipath propagation, transform the multipath existing in the traditional communication system into an enhancement factor that is beneficial to user communication performance, and bring wireless communication performance without additional bandwidth. to double the improvement. There are two main ways to realize MIMO technology: spatial multiplexing and spatial diversity. The former is to realize spatial multiplexing by transmitting mu...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/18H04L27/26
Inventor 段亚军韦辉王衍文
Owner ZTE CORP
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