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A single-input multiple-output wireless transmission method for multiple data streams

A single-input multiple-output, multi-data stream technology, applied in the multi-antenna field, can solve the problems of limited maximum power domain strength value, increase the complexity of the base station, and it is impossible to divide the number of layers of users in the power domain. The effect of speed, complexity reduction

Active Publication Date: 2021-11-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to equipment structure and technical reasons, the maximum power domain strength value of the system is very limited, and the number of levels that the power domain can divide users cannot be too many
In addition, traditional non-orthogonal access based on multi-user conflicts with multi-user uplink power control, which increases the complexity of resource allocation at the system level for the base station

Method used

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  • A single-input multiple-output wireless transmission method for multiple data streams
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  • A single-input multiple-output wireless transmission method for multiple data streams

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Embodiment 1

[0037] Consider a simple single-input multiple-output (SIMO) system with 3 antennas at the base station, 1 antenna at the user, and so on for SIMO systems with more antennas. The user uses one antenna to send data to the base station on the same physical resource, such as time. Since the sending end has only one antenna, the traditional SIMO system can only send one data stream, that is to say, the user can only send one data symbol on the same physical resource, such as a time slice.

[0038] For simplicity of analysis, it is assumed that the transmitted signal experiences a flat fading (Flat fading) channel, the channel parameter of base station antenna 1 is h1, the channel parameter of antenna 2 is h2, and the channel parameter of antenna 3 is h3, and the channel parameters remain constant during data transmission. Change. Assume that the channel of antenna 1 is stronger than the channel of antenna 2, and the channel of antenna 2 is stronger than that of antenna 3, that is...

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Abstract

The invention discloses a multi-data stream wireless transmission method suitable for a single-input multiple-output (SIMO) system. First, the sending end sends a pilot signal, and the receiving end estimates the channel parameters between the sending antenna and each receiving antenna and feeds it back to the sending end; secondly, the sending end assigns different sending power to each data stream according to the strength of the channel and send them together; next, the receiving end first demodulates the data stream with the strongest power on the antenna with the weakest channel; the receiving end removes the interference generated by the data stream with the strongest power on the antenna with the second weakest channel, Then the data stream with the next strongest power is demodulated; finally, the receiving end judges whether there is any antenna that has not demodulated the data stream. If so, the receiving end removes the interference generated by the n-1 data stream with the strongest power on the nth weakest antenna of the channel, and then demodulates the data stream with the nth strongest power. If not, end the loop and output the final result.

Description

technical field [0001] The invention is a single-input multiple-output transmission method of multiple data streams, which can increase the transmission data rate, and belongs to the technical field of multiple antennas in mobile communication systems. Background technique [0002] At present, the standardization work of the fifth generation mobile communication system (5G) has ended, and large-scale commercial use is beginning. 5G adopts multi-antenna technology, requiring the base station to be equipped with a minimum of 32 antennas. It can be seen that it is a trend in the development of future communication systems that the base station adopts a larger number of antennas. In the millimeter wave frequency band, the terminal can also use multiple antennas. However, considering issues such as price and antenna size, terminals in the microwave band mostly use a single antenna or a small number of antennas. Considering the coverage advantages of the microwave frequency ban...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309H04B17/382H04L25/03H04W72/04H04W72/08H04W72/54
CPCH04B17/309H04B17/382H04L25/03006H04W72/0473H04W72/542
Inventor 盛彬张辉顾嘉雯张佳丽
Owner SOUTHEAST UNIV