System resource distribution method and device based on wave beam shaping

Abstract

The invention discloses an uplink system resource allocation method based on beam forming; in allocation period, BS can obtain channel state information of each SS uplink in each time slot in a frame by the channel detection technology, and for each SS, the eigenvalue of MIMO channel matrix is decomposed in each time slot. The biggest eigenvalue after decomposition and corresponding eigenvectors form channel power gain matrix of each SS in each time slot; BS utilizes marginal effect and improved greedy algorithm to allocate time slots for each SS; each SS extracts allocated time slot information from a received downlink subframe and allocates power and bit; each SS sends the information of allocated power and bit to BS by a control part of an uplink subframe; BS is used for processing the received data to obtain the original data sent by SS. The invention also discloses a corresponding device, comprising a self-adaptive beam forming, sub-carrier allocation module as well as a power and bit allocation module. The method is of low complexity and good real-time property.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a beamforming-based uplink system resource allocation method and device. Background technique [0002] The current research on adaptive allocation algorithms is mainly focused on the downlink, and there is less research on the uplink adaptive allocation algorithm, and it is mainly for the uplink adaptive allocation algorithm research of Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) system. Since the biggest difference between the uplink and downlink is the distributed power limit, that is, each UE has its own power limit during the uplink, so the research on the uplink adaptive allocation algorithm is more difficult than the downlink. How to propose an uplink An effective adaptive allocation scheme to better utilize channel resources and meet the needs of different services is of great significance to the next generatio...

AI Technical Summary

Problems solved by technology

Although the complexity of this method is very low, this method is for single-user allocation, not suitable for practical systems, and does not consider the situation of multiple antennas

In the patent application of Beijing University of Posts and Telecommunications with the application number 200510083831.0, a low-complexity power minimization allocation method is adopted, which includes two parts: adaptive modulation and adaptive demodulation. Power and bit allocation is performed in one frame, and then the allocation scheme is saved, and the stored scheme is called for corresponding mapping when sending subsequent frames. Although this scheme is simple, its real-time performance is not good, especially when the channel conditions change rapidly. When, such as high-speed mobile conditions, the performance is poor

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