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Non-orthogonal multiple access system signal detection method with low complexity

A non-orthogonal multiple access and access system technology, applied in the field of low-complexity non-orthogonal multiple access system signal detection, can solve the problem of high algorithm complexity

Active Publication Date: 2019-04-16
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a low-complexity non-orthogonal multiple access system signal detection method, which is used to solve the problem of high algorithm complexity in the prior art and the need for multiple Problems with Orthogonal Operations

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  • Non-orthogonal multiple access system signal detection method with low complexity
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  • Non-orthogonal multiple access system signal detection method with low complexity

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Embodiment Construction

[0069] The present invention will be further described below. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0070] A low-complexity non-orthogonal multiple access system signal detection method, the method includes the following steps:

[0071] Step 1: Obtain the complex channel coefficient matrix, the received signal vector, the transmitted signal vector, the number of transmitting antennas, and the number of receiving antennas of the additive white Gaussian noise channel, and perform real-number processing on the complex channel coefficient matrix to obtain a real number matrix. The number of rows and the number of columns of the real matrix are respectively twice that of the complex channel coefficient matrix;

[0072] The complex channel coefficient matrix adopts formula (1) for realizing processing:

[0073]

[0074] Where: G is a ma...

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Abstract

The invention discloses a non-orthogonal multiple access system signal detection method with low complexity, and belongs to the technical field of wireless communication. The method includes steps: performing ranking according to SNR values of signals, performing ranking QR detection on a matrix, and obtaining an orthogonal matrix and an upper triangular matrix; switching a pair of adjacent columns with another pair of adjacent columns in the matrix by employing the symmetry between column vectors to reduce orthogonal calculation in a ranking QR decomposition algorithm; and detecting a reception signal matrix outputted by a receiving end according to an iteration formula to obtain an estimated value of a transmitting signal. According to the method, on the premise of not reducing the system performance, the complexity of the conventional algorithm is reduced, and the calculation complexity is almost 50% of that of the conventional method.

Description

Technical field [0001] The present invention relates to wireless communication technology, in particular to a low-complexity non-orthogonal multiple access system signal detection method. Background technique [0002] In 2014, the IMT-2020 Promotion Group proposed a 5G white paper. In the fifth-generation communication system, higher demands will be put forward. Compared with 4G, 5G will meet 1000 times or more capacity requirements, 10 to 100 times more user equipment connections, and 5 to 15 times higher spectrum efficiency. In the face of 5G massive connection scenarios, the existing 4G OFDMA technology has certain limitations. In order to further improve the system capacity and efficiency, wireless transmission technology based on Non-Orthogonal Multiple Access (NOMA) has become a popular technology for future mobile communication systems. [0003] Although NOMA technology improves the capacity and efficiency of wireless communication, it also means more complex configuration...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L1/00
CPCH04L1/0048H04L1/005H04L25/0391
Inventor 唐加山朱婧菁
Owner NANJING UNIV OF POSTS & TELECOMM
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