Multiuser asynchronous information detection method and apparatus

Abstract

The embodiment of the invention discloses a method and a device used for detecting multi-user asynchronous information thereof, belonging to the field of wireless communication; the method comprises the steps as follows: channel estimation is respectively carried out according to at least two asynchronous information prearranged by other users corresponding to the benchmark users, thus gaining atleast two groups of channel factors; according to at least two groups of channel factors, the information of the receiving antenna is calculated; according to the information of the receiving antenna, the asynchronous information of other users corresponding to the benchmark user is detected; the method comprises also the steps as follows: channel estimation is carried out for at least two users,thus gaining at least two frame synchronous information; the prearranged user is used as benchmark user so as to calculate the frame synchronous information difference between other users and the prearranged user, thus gaining the asynchronous information of the other users and the benchmark user. The device comprises a channel estimation module and an asynchronous information detection module; the device also comprises a first calculation module and a second calculation module. The technical proposal of the embodiment of the invention can detect the multi-user asynchronous information and greatly improve the receiving performance.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a multi-user asynchronous information detection method and device. Background technique [0002] In the MUROS (Multi-User Reusing-One-Slot, multiple users reusing the same time slot) technology of the current wireless communication system, at least two users are reused in the same time slot. There are two or more users at the same time, and MUROS multiplexes at least two users on the same wireless resource. [0003] In the prior art, when the at least two user signals are received, it is generally assumed that the user signals are synchronous, and the at least two user signals are received on the basis of the synchronous user signals. However, in practice, it cannot be guaranteed that all users are completely synchronized, and there is an asynchronous information between users. Different asynchronous information greatly affects the receiving performance of the at least tw...

AI Technical Summary

Problems solved by technology

Refer to Figure 1, performance curve 1 shows that two users are asynchronous In this case, when the two users are assumed to be synchronous, the receiving performance of the target user is 10dB lower than that of the interfering user. Receiving performance when offset; performance curve 3 shows the receiving performance when two users are synchronized, and the target user has no power offset compared with the interfering user; performance curve 4 shows two users are synchronous, and the receiving performance of the target user is 10dB lower than that of the interfering user performance; as can be seen from Figure 1, two users The receiving performance of the existing technology is very good when synchronous, but when the two users are asynchronous, the existing technology cannot meet the QoS requirements

Therefore, if the asynchronous information is not detected and the user is assumed to be synchronous, the demodulation performance of the user is poor, the bit error rate is high, and the QoS requirements may not be met. When the asynchronous information of different users is relatively large, there may even be a performance floor

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