Multi-input and multi-outlet demodulating method and device

Abstract

The present invention discloses a method and device for a Multi-Input Multi-Output (MIMO) demodulation. The method includes: receiving a carrier signal; obtaining a carrier estimation signal of the transmitted carrier signal according to the received carrier signal and a channel matrix; acquiring a unitedly-calibrated carrier signal according to the obtained carrier estimation signal; demodulating said unitedly-calibrated carrier signal and outputting soft information; quantizing the soft information according to a preset quantization step length and then outputting quantized soft information. By respectively calculating the carrier estimation signal of the transmitted carrier signal, recording different amplification factors for each carrier estimation value of the carrier estimation signal, unifying each carrier estimation value according to the standard of the minimum amplification factor, then quantizing the output soft information in the demodulation process, and finally outputting quantized soft information, the technical solution of the present invention overcomes the defect of high complexity for MIMO demodulation in the prior art, thereby saving algorithm time and memory resources and improving system performance.

Description

technical field [0001] The invention belongs to the field of mobile communication, and relates to a low-complexity MIMO (MultiInput and MultiOutput) demodulation method and device. Background technique [0002] Multiple-input and multiple-output refers to the use of multiple transmitting antennas and receiving antennas in the transmitter and receiver respectively, and the signals are combined reasonably. This combination is both artificial (such as weighting each antenna) and natural combination (such as spatial channel function), so that the performance of each MIMO user is improved. figure 1 An example of a two-transmit, two-receive MIMO system is shown. One of the main features of MIMO systems is to turn signal multipath propagation, which is considered harmful in the traditional sense, into a favorable factor. It makes full use of channel fading over time and multipath delay expansion to double the transmission speed without increasing the system bandwidth. [0003] A...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method and system for multiple-input multiple-output demodulation, to solve the shortcomings of high complexity in solving MIMO in the prior art, the technical solution is as follows:

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