Resource allocation method and device based on NOMA

Abstract

The invention provides a resource allocation method and device based on NOMA (Non-Orthogonal Multiple Access). The method comprises the following steps: an uplink non-orthogonal multiple access millimeter wave system model in which a base station adopts a fully-connected sparse radio frequency link antenna structure is established; an analog beam design based on a codebook and an improved NOMA decoding scheme are provided; a maximum and minimum user energy efficiency (EE) optimization problem is constructed by jointly optimizing the detection matrix at the BS and the sending power at the user;a fractional objective function is converted into a subtractive objective function, a double-loop iterative algorithm is provided to solve the fractional objective function, a detection matrix and transmitting power are iteratively updated in an inner loop, and the optimal solution of the problem is obtained in an outer loop by adopting double-section iteration. According to the uplink MIMO-NOMAmillimeter wave system researched by the invention, a codebook-based analog beam design is provided, so that the pilot overhead of channel estimation is reduced; the joint optimization design of the transmitting power of the user and the detection matrix of the BS achieves better performance in the aspects of spectral efficiency and energy efficiency.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a resource allocation method and device based on NOMA. Background technique [0002] Millimeter wave (mmWave) technology has emerged as a promising solution to meet the rapidly growing capacity demands of wireless networks. However, mmWave signals suffer from severe propagation loss due to the high carrier frequency. To compensate for losses, a base station (BS) typically uses a large number of antennas to provide large array gain. However, it is not practical to implement dedicated radio frequency (RF) chains for all antenna elements due to high power consumption. Therefore, in order to reduce energy consumption and hardware cost, an advanced sparse RF chain antenna structure is adopted. To improve the spectrum utilization of wireless networks, non-orthogonal multiple (NOMA) technology is considered as a promising solution. This program studies the power d...

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Therefore, existing downlink solutions cannot be used to solve the considered problem

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