Radial primary function network multi-user detection method based on immune dynamic regulation

Abstract

The invention relates to a radial basis function network multi-user detection method which is based on immunity dynamic adjustment, belonging to the field of wireless communication signal process technique; the radial basis function network multi-user detection method is characterized in that, known training data is sent at a gap of an emission part which is used for sending information source data packages; at the receiving part, the output weight values of a RBF multi-user detector are adjusted according to the training data, whether the user environment of CDMA system is changed or not is judged and whether the adjustment to the hidden layer parameters of the RBF multi-user detector is carried out continuously or not is determined; initial adjustment of the hidden layers of the RBF multi-user detector is carried out according to the sample points with big error in the training data; the hidden layer parameters of the RBF multi-user detector are adjusted by adopting an immunity optimization mechanism; RBF multi-user detector with best performance is selected as the result of the immunity dynamic adjustment. The detection method of the invention has strong adaptability for the channel changes in the CDMA system and the dynamic changes of the system environment such as user access-in, and achieves excellent detection performance and real-time performance.

Description

technical field [0001] The invention relates to a detection method in the technical field of wireless communication signal processing, in particular to a radial basis function network multi-user detection method based on immune dynamic adjustment for a Code Division Multiple Access (CDMA) system. Background technique [0002] Multi-user communication with a large number of users is the basic communication form of broadband high-speed multimedia mobile communication in the future, and is the main mode of 3G and newer mobile communication. Code Division Multiple Access (CDMA) technology is one of its key technologies, which can meet the needs of high-capacity, low-cost, and high-efficiency mobile communications. However, due to the problems of multiple access interference and near-far effect in the system, the capacity and performance of the system are greatly affected. Multi-user detection technology can effectively eliminate multiple access interference, improve system perf...

AI Technical Summary

Problems solved by technology

This method uses the immune mechanism to dynamically determine the nonlinear parameters of the RBF multi-user detector, so as to effectively approach the optimal multi-user detector in a short period of time as much as possible, and improve the real-time and robustness of the multi-user detector. Solve the problem that the classic multi-user detector is difficult to converge to the global optimal point in a dynamic environment, and it is not suitable for multi-user communication with a large number of users

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