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Power distribution method for MUSA downlink by comprehensively considering channel capacity and bit error rate

A downlink, comprehensive consideration technology, applied in the field of power allocation, can solve the problems of complex allocation methods and the difficulty of accurately estimating channel gain in the power allocation method of NOMA system, to achieve validity and reliability guarantees, the method is simple, and the calculation low-complexity effects

Active Publication Date: 2021-03-12
HARBIN INST OF TECH +1
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Problems solved by technology

[0010] The present invention is to solve the problem that the existing NOMA system power allocation method is difficult to accurately estimate the channel gain and the allocation method is complex, thereby providing a power allocation method for the MUSA downlink that comprehensively considers channel capacity and bit error rate

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  • Power distribution method for MUSA downlink by comprehensively considering channel capacity and bit error rate
  • Power distribution method for MUSA downlink by comprehensively considering channel capacity and bit error rate
  • Power distribution method for MUSA downlink by comprehensively considering channel capacity and bit error rate

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specific Embodiment approach 1

[0027] Specific implementation mode 1. The power allocation method of MUSA downlink comprehensively considering channel capacity and bit error rate,

[0028] For the MUSA downlink multi-user scenario, the base station allocates power to each user, and each user shares the same time-frequency channel resource. After receiving the signal, each user uses MMSE-SIC to detect the data they need respectively.

[0029] Based on the power allocation of two users, a MUSA downlink power allocation method that takes into account both channel capacity and bit error rate is proposed, and it is promoted for multi-user scenarios.

[0030] In the scenario model, set the channel gain between the base station and user k as h k , the modulation symbol and spreading sequence of user k are set to x k 、w k ; The power coefficient assigned by the base station to each user is c k . Without loss of generality, set the channel gain of multiple users |h 1 | 2 ≤|h 2 | 2 ≤L≤|h k | 2 ≤L≤|h K | ...

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Abstract

The invention discloses a power distribution method for a MUSA downlink by comprehensively considering channel capacity and bit error rate, relates to the technical field of communication, and aims tosolve the problems that it is difficult to accurately estimate the channel gain and a distribution method is complex in a conventional power distribution method of an NOMA system. According to the method, the channel capacity and the bit error rate performance are comprehensively considered, and the effectiveness and the reliability can be guaranteed. According to the power distribution algorithmprovided by the scheme, power distribution can be carried out on downlink users only by sending the pilot frequency in an uplink mode in an MUSA system and then accurately estimating the channel gain, and the method is simple, low in calculation complexity and easy to implement.

Description

technical field [0001] The present application relates to the field of communication technology, in particular to the power allocation technology under the non-orthogonal multiple access technology. Background technique [0002] 1. MUSA [0003] With the development of communication technology, the number of wireless access devices and the consumption of data traffic will show explosive growth. In previous wireless communication systems, Orthogonal Multiple Access (OMA) is used. However, since the resources allocated to different users in OMA technology need to be kept orthogonal, it is possible to share [0004] The number of users of the same channel resource is limited. In order to deal with such limitations, some researchers have proposed Non-Orthogonal Multiple Access (NOMA) technology. This technology can increase the capacity of the system and improve the spectrum efficiency of the system at the same time, so that communication can be completed with higher efficie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04W52/24H04W52/26
CPCH04W52/143H04W52/241H04W52/267
Inventor 吴少川张浩然李壮
Owner HARBIN INST OF TECH
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