Wireless beam modulation-based non-phase interference elimination method
An interference cancellation and beam technology, applied in the field of Internet of Things communication, can solve problems such as interference and multi-user interference, and achieve the effects of improving robustness, saving communication resources, and high energy efficiency
Active Publication Date: 2022-01-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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[0005] The purpose of the present invention is to overcome the problem of multi-user interference existing in the prior art, and provides a phaseless interference elimination method based on wireless beam modulation, which obtains approximate The estimation algorithm obtains the approximate multi-user interference, determines the node for exhaustive search according to the energy difference at the receiving end, and iteratively eliminates the interference for the remaining nodes, and selects the decoding combination that can minimize the energy difference at the receiving end as the decoding result , to achieve decoding and information transmission
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Embodiment 1
[0037] Such as figure 1 As shown, a phaseless interference cancellation method based on wireless beam modulation includes the following steps:
[0038] S1: Select the data vector received by a group of antennas at the receiving end in real time, and multiply the multi-user interference vector to be estimated by the matrix formed by the preamble at the transmitting end and the inversion of the preamble at the transmitting end to establish a linear equation;
[0039] Specifically, the established linear equation is The matrix formed by the inversion of the sending end preamble and the sending end preamble is D=[B 1 , 1-B 1 ,...,B K , 1-B K ] s×2K , where B K is the binary preamble sequence transmitted by the kth IoT node, D is the matrix formed by the inversion of the sending end preamble and the sending end preamble, Beam y for the jth group of receiving antennas at the receiving end j The vector composed of the received multi-user interference transmitted by each tra...
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The invention discloses a wireless beam modulation-based non-phase interference elimination method, and relates to the technical field of Internet of Things communication. The method comprises the following steps of: switching and sending a modulated millimeter wave beam by a system according to a sent data frame information bit, spreading the millimeter wave beam along different paths in a channel, and completing beam modulation in a channel spreading process, estimating the multi-user interference variable according to the lead code in the data frame, and performing interference elimination on the basis. The problem of multi-user interference in an amplitude modulation system is effectively solved, interference estimation is carried out by establishing a correlation matrix, all nodes of the internet of things can simultaneously transmit the lead code and data without time-sharing transmission, and time-sharing transmission is not needed. Therefore, an unauthorized access mode can be supported, the robustness of the system is improved, communication resources are saved, and the compromise between bit error rate performance and algorithm complexity is realized through the combination of exhaustive search and iterative elimination algorithms.
Description
technical field [0001] The invention relates to the technical field of Internet of Things communication, in particular to a phaseless interference elimination method based on wireless beam modulation. Background technique [0002] The sixth generation of communication is designed to support massively connected Internet of Things (IOT) devices, which puts forward higher requirements for low-latency, low-power, and low-cost communication systems. However, communication systems operating in the crowded sub-6GHz band are far away in the future providing high data rate transmission services. Although, mmWave-based communication has the potential to solve this problem by providing higher transmission bandwidth, which provides gigabits per second transmission, and beamforming technology to overcome the problem of high path loss. [0003] However, hybrid beamforming transmission still requires high power overload, especially for IoT devices. In order to further reduce the hardware...
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IPC IPC(8): H04J11/00H04B7/08
CPCH04J11/0026H04J11/0036H04J11/0043H04B7/0854
Inventor 张皓云陈杰男李帅高文哲熊兴中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA