Nonlinear waveform synchronous and asynchronous NOMA system design method

Abstract

The invention discloses a nonlinear waveform synchronous and asynchronous NOMA system design method, which comprises the following steps: step 1, establishing a synchronous and asynchronous NOMA system model of a nonlinear waveform MSK-type signal to obtain a received signal, the received signal comprising normalized time delay, transmitting power and response length; step 2, sampling the received signal by adopting an oversampling technology to obtain a received signal sampling value and a matrix form thereof; step 3, according to the Shannon theorem, obtaining the index throughput for measuring the performance of the synchronous and asynchronous systems; step 4, establishing an optimal system design problem taking the maximum throughput as a target according to the throughput expression; and step 5, analyzing the normalized time delay, the transmitting power and the relationship between the response length and the throughput. According to the nonlinear waveform synchronous and asynchronous NOMA system design method provided by the invention, the system can reach the maximum throughput by setting the normalized time delay and the transmitting power of the two users, and the optimal design of the system is completed.

Description

Technical field [0001] The present invention belongs to the field of digital communications, and more particularly to synchronous and asynchronous problem solving nonlinear waveform NOMA system design. Background technique [0002] With the development of wireless communication technology, wireless communication system occurred several generations of change, of which the development of multiple access technology determines the direction of the evolution of wireless communication systems. In the past generations of mobile communication network, i.e. OMA orthogonal multiple access technology has been widely used, i.e. it in an orthogonal resources allocated to each user cross-correlation is zero or very low, guaranteed occupied by each user different resources. Design principle is a single resource or multiple resources to a combination of resource allocation, resources include code domain, time domain, frequency domain and airspace like. In theory, the OMA technology completely su...

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Problems solved by technology

[0004] At present, there are many studies on NOMA, but the modulation method is assumed to be linear modulation suitable for low-efficiency linear power amplifiers, which is not the best choice for wireless communication systems that have higher requirements for power efficiency, such as military and satellite communications.

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