Symbol detection method and system for joint active users in centerless non-orthogonal system
A non-orthogonal, symbolic technology, applied in the field of symbol detection in a non-center non-orthogonal system with active users, can solve the problems of reduced detection performance, amplified noise, etc., to achieve the effect of improving symbol detection performance
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Embodiment 1
[0023] figure 1 It is a flow chart of a method for detecting symbols of joint active users in a centerless non-orthogonal system according to an embodiment of the present invention. The method is applied to a target client, and the target client is a client of a user node of the target communication system. The target The communication system is a centerless non-orthogonal communication system. like figure 1 As shown, the method specifically includes the following steps:
[0024] Step S102, acquiring a target communication signal carrying symbol information; the target communication signal is the sum of communication signals transmitted by at least one user node client.
[0025] Step S104, based on the needle board prior model, determine the active prior probability of each user node in the target communication system.
[0026]Step S106, based on the active prior probability of each user node and the target communication signal, initialize iteration parameters; the iteratio...
Embodiment 2
[0076] The following distance illustrates the simulation detection results of a symbol detection method for joint active users in a centerless non-orthogonal system provided by the present invention.
[0077] Assume that the multi-antenna decentralized network has K=100 independent user nodes, and the number of transmitting antennas for each user node is N T , the number of receiving antennas is N R , user nodes non-orthogonally access the network. The target communication system bandwidth is divided into M subcarriers. The ratio of K / M is defined as the overload factor. There are J=20 active user nodes that are transmitting data, and the active user nodes are randomly grouped, and the size and position of the group are also random. For all simulation results, the elements of the observation matrix H obey independent Gaussian distribution, and the user node bit data adopts BPSK modulation. Normalized Mean Squared Error (NMSE) performance, a series of experiments are conduc...
Embodiment 3
[0081] Figure 5 is a schematic diagram of a centerless non-orthogonal system joint active user symbol detection system provided according to an embodiment of the present invention, the system is applied to a target client, and the target client is a client of a user node of the target communication system, and the target communication The system is a centerless non-orthogonal communication system. like Figure 5 As shown, the system includes: a receiving module 10 , a determining module 20 , an initialization module 30 and an iteration module 40 .
[0082] Specifically, the receiving module 10 is configured to acquire a target communication signal carrying symbol information; the target communication signal is a sum of communication signals transmitted by at least one user node client.
[0083] The determining module 20 is configured to determine the active prior probability of each user node in the target communication system based on the needle board prior model.
[0084...
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