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Two-user NOMA (Non-Orthogonal Multiple Access) downlink energy efficiency optimization method in consideration of SIC (Successive Interference Cancellation) energy consumption

An optimization method and a user-friendly technology, applied in the field of wireless communication, can solve the problems of low overall energy efficiency of the system, lack of SIC signal processing energy consumption, etc.

Inactive Publication Date: 2016-11-23
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The traditional NOMA system power coefficient allocation scheme is aimed at maximizing the total system capacity, and also lacks the consideration of the energy consumption of the SIC signal processing part. Therefore, according to the traditional NOMA system power coefficient allocation scheme, the total energy efficiency of the system will be low.

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  • Two-user NOMA (Non-Orthogonal Multiple Access) downlink energy efficiency optimization method in consideration of SIC (Successive Interference Cancellation) energy consumption

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[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0047] The two-user NOMA downlink energy efficiency optimization scheme considering SIC energy consumption provided by the present invention determines the power allocation coefficient of the two users according to the information of users with good channel conditions and the transmission power of the base station, so as to achieve the effect of optimal energy efficiency.

[0048] figure 1 As sho...

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Abstract

The invention discloses a two-user NOMA (Non-Orthogonal Multiple Access) downlink energy efficiency optimization method in consideration of SIC (Successive Interference Cancellation) energy consumption. The method comprises steps: firstly, transmitting power P of a base station, a channel condition H1 between a user 1 and the base station, a channel condition H2 between a user 2 and the base station and a signal voltage difference threshold theta for multiplex signal separation needed when a user receiver executes the SIC are acquired; and the user with a good channel condition executes the SIC, a power distribution coefficient is optimized according to the channel condition of the user with the good channel condition, and the optimal power distribution scheme is obtained. The method of the invention is applicable to a two-user NOMA downlink system in consideration of SIC energy consumption, and compared with a two-user NOMA system in no consideration of SIC energy consumption, while the total system capacity is ensured, and the total energy efficiency of the system can be well enhanced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically relates to a two-user NOMA downlink energy efficiency optimization method considering SIC energy consumption. Background technique [0002] Facing the growth of traffic demand and the scarcity of spectrum resources, NOMA (Non-orthogonal Multiple Access, non-orthogonal multiple access) technology, as a power domain multiplexing technology, has become a One of the hot candidates for the next generation of mobile communication multiple access technology. Unlike the spectrum resources in the 4G system that are occupied by one user alone, the NOMA system allocates the same spectrum resources to multiple users, and realizes power domain multiplexing by allocating different power coefficients. Users with better channel conditions eliminate interference from other users by performing SIC (Successive Interference Cancellation, continuous interference cancellation), th...

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Application Information

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IPC IPC(8): H04W52/02H04W72/04
CPCH04W52/0203H04W72/0473Y02D30/70
Inventor 张靖刘国亨张艳霞廖宴
Owner HUAZHONG UNIV OF SCI & TECH
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