Large-scale antenna array relay transmission method adopting analog-digital hybrid detection

A large-scale antenna and digital-analog hybrid technology, applied in relay system monitoring and other directions, can solve the problems of increasing hardware complexity and energy consumption

Active Publication Date: 2017-01-04
SOUTHEAST UNIV
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Problems solved by technology

[0005] Combined with the consideration that the use of large-scale antenna arrays will greatly increase hardware complexity and energy consumption

Method used

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  • Large-scale antenna array relay transmission method adopting analog-digital hybrid detection
  • Large-scale antenna array relay transmission method adopting analog-digital hybrid detection
  • Large-scale antenna array relay transmission method adopting analog-digital hybrid detection

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0043] Such as figure 1 As shown, a large-scale antenna array relay transmission method using digital-analog hybrid detection includes the following steps:

[0044] (1) K users send analog signals to the relay at the same time, and the number of relay antennas is N r , the relay receives the analog signal y r ,

[0045] y r = P u H x + n r

[0046] Among them, P u Represents the transmit power of each user, x represents the transmit signal vector with dimension K×1, satisfying E{xx H}=I K , E{} represents the mean of the matrix, superscript x H represents the conjugate transpose of x, I K Represents an identity matrix with dimension K×K; n r Indicates that the dimension is N r ×1 relay noise vector, satisfying I...

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Abstract

The invention discloses a large-scale antenna array relay transmission method adopting analog-digital hybrid detection. Multiple users send analog signals under the same power, a relay carries out amplification and forwarding of the analog signals on the signals, a base station radio frequency link unit is matched with a large-scale antenna array to detect the received signals, an analog radio frequency detector extracts phase information of multi-user-relay and relay-base-station cascaded channels, a digital baseband detector uses linear detection on an equivalent channel of a product of the cascaded channels and a analog detector, and the analog radio frequency detector is connected with the digital baseband detector by radio frequency links; a base station analyzes a signal-to-interference and noise ratio of received signals, calculates out transmission powder required by the users at a corresponding effective transmission rate, and feeds back the transmission powder to the users; finally, multiple users send the analog signals according to the transmission powder fed back by the base station. According to the large-scale antenna array relay transmission method disclosed by the invention, on the premise of ensuring the effective transmission rate of a system, uplink transmission powder of the users can be reduced according to an exponential rule by increasing the number of receiving antennas, so that energy efficiency of the system is improved.

Description

technical field [0001] The invention relates to the field of detection method design in a large-scale antenna array system, in particular to a large-scale antenna array relay transmission method using digital-analog hybrid detection. Background technique [0002] As a key technology of 5G in the future, massive multiple antenna system (MIMO, multiple input multiple output) can significantly improve spectrum efficiency and energy efficiency. In the downlink of the massive MIMO system, in order to achieve the maximum capacity of the communication system, it is necessary to use a precoding technology, and non-linear precoding can achieve optimal performance, such as dirty paper coding (DPC, dirty paper coding). However, this kind of nonlinear precoding is relatively complicated. In order to simplify the precoding scheme without losing system performance, linear precoding can be used, such as ZF precoding, which can approach the maximum capacity to a certain extent. Further stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/40
CPCH04B17/40
Inventor 许威王宇成张华
Owner SOUTHEAST UNIV
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