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Large-scale access method based on cooperative transmission of wireless information and energy

A technology of coordinated transmission and access methods, applied in transmission systems, digital transmission systems, baseband systems, etc., can solve problems such as low spectrum efficiency, high computational complexity, and long training sequences, and achieve high spectrum efficiency and implementation complexity Low, the effect of suppressing interference

Active Publication Date: 2019-04-05
ZHEJIANG UNIV
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Problems solved by technology

[0006] The present invention proposes a large-scale access method based on wireless information and energy coordinated transmission in order to solve the problems of long training sequence, low spectrum efficiency, and high computational complexity in the above solution when large-scale mobile terminals access

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  • Large-scale access method based on cooperative transmission of wireless information and energy
  • Large-scale access method based on cooperative transmission of wireless information and energy
  • Large-scale access method based on cooperative transmission of wireless information and energy

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Embodiment Construction

[0034] The block diagram of large-scale access system based on wireless information and energy coordinated transmission is as follows: figure 1 As shown, the base station has N t One antenna is configured for each mobile terminal. Based on the large-scale fading information of the downlink channel, the base station divides the mobile terminals into multiple clusters, and each cluster contains a small number of mobile terminals to reduce the complexity of serial interference cancellation. Mobile terminals in the same cluster use the same training sequence, while mobile terminals in different clusters use mutually orthogonal training sequences, and transmit training sequences to the base station on the uplink channel at the same time. The base station uses the minimum mean square error channel estimation method to obtain the equivalent channel state information of each cluster, and designs the transmit beam, inter-cluster power allocation factor and power division factor for ea...

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Abstract

The invention discloses a large-scale access method based on cooperative transmission of wireless information and energy. A multi-antenna base station is arranged in the center of a cell, and a largenumber of mobile terminals need to access a wireless network through the base station. According to long-term channel statistic information, the base station divides the mobile terminals to a plurality of clusters. All mobile terminals transmit training sequences to the base station at the same time. The base station obtains the equivalent channel state information of each cluster through channelestimation, the transmitted signals of the clusters are superimposed and coded, and the superimposed and coded signals are then transmitted through beamforming. After the mobile terminal receives thesignals, the signals are divided to two parts in power, one part is transmitted to an information receiver for information decoding, and the other part is transmitted to an energy receiver to convertreceived radio frequency signals to electric energy and store the electric energy. Thus, an effective wireless access method is provided for the Internet of Things of mobile terminals with large-scaleenergy limitation.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a large-scale access method based on coordinated transmission of wireless information and energy. Background technique [0002] In recent years, the rise of the mobile Internet has led to the rapid development of the Internet of Things industry. The future wireless network needs to support the simultaneous access of large-scale mobile terminal devices. In currently widely used orthogonal multiple access technologies, such as time division multiple access (TDMA), frequency division multiple access (FDMA) and code division multiple access (CDMA), a radio resource block can only be allocated Give a mobile terminal. Due to the scarcity of wireless resources, it is difficult for traditional orthogonal multiple access technology to support simultaneous access of large-scale users. In this context, non-orthogonal multiple access technology has been extensively studied and widely ...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H02J50/20
CPCH02J50/20H04L25/0204H04L25/03006
Inventor 齐俏陈晓明
Owner ZHEJIANG UNIV
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