Method and device for confirming signal-interference-noise radio

Abstract

The invention discloses a method and a device for confirming a signal-interference-noise radio (SINR). The method comprises the steps of obtaining channel response information, calculating related coefficient sum of row vectors and confirming the SINR of each data stream by utilizing the channel response information and the related coefficient sum. The device comprises a channel response information acquiring module and a calculating module. The scheme of the invention can effectively lower the complexity for confirming the SINR.

Description

technical field [0001] The present invention relates to a processing technology in a wireless communication system, in particular to a method and device for determining a signal interference noise ratio (signal interference noise ratio, SINR) in a multi-user wireless communication system. Background technique [0002] Compared with the traditional single-input-single-output (SISO) system, multiple antennas at the transmitting end and / or receiving end in a multi-user system can bring space diversity gain and / or space multiplexing gain, So it has better system performance. Therefore, a multi-user system with multiple antennas has become one of the main focuses of the next generation mobile communication system. [0003] In the spatial multiplexing mode, different data streams are distributed on independent spatial channels for transmission. In this way, the simultaneous transmission of multiple data streams greatly increases the throughput of the multi-user system, so that t...

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Problems solved by technology

In this way, within a scheduling period, the complexity of the existing process of determining the SINR is: (2×Nt 3 +Nt 2 +2Nt) complex number operations, it can be seen that the complexity is related to the third-order and second-order exponents of the number of transmitting antennas

Such complexity is acceptable for a system with a single transmit antenna, which is only 5 complex operations; however, when the number of transmit antennas is large, the complexity of the existing scheme will increase sharply, for example, when Nt=2, Its complexity is: (2×2 3 +2 2 +2×2)=24 complex number operations, when Nt=4, its complexity is: (2×4 3 +4 2 +2×4)=152 complex number operations, when Nt=8, then (2×8 3 +8 2 +2×8)=1104 complex number operations

If the above SINR determination scheme is applied to the process of precoding matrix selection or multi-user scheduling, the complexity will increase linearly with the number of precoding matrices or the number of users, so more complex operations need to be performed

[0023] Therefore, the existing SINR determination method has high complexity for the case of multiple transmit antennas

Furthermore, due to the high computational complexity, the multi-user system can only use high-performance equipment, which increases the system cost

In addition, multiple complex calculations will take a long time, so that the equipment that assists in determining the SINR has to perform other tasks at the same time as or after performing these complex calculations, which will cause a long delay in the response to the task and reduce system performance.

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