Digital signal down variable frequency processing system based on MIMO real time test platform

Abstract

The invention discloses a digital signal down-conversion processing system based on an MIMO real-time testing platform, pertaining to the technical field of digital signal processing. The system comprises four DDC modules and each DDC module consists of four independent digital signal down-conversion processing channels. Each channel consists of an analog-to-digital converter, a digital quarter mixer and a digital decimation filter set. The digital quarter mixer consists of a digital controlled oscillator and two paths of multipliers, and the digital controlled oscillator is respectively connected with the two multipliers; the digital decimation filter set consists of two groups of filters with complete same parameters and each filter group respectively comprises a CIC decimation filter, a CFIR compensation filter and a PFIR matched filter which are connected in sequence. The system has good expansibility and modularization and can meet the requirements of real-time and high-speed performance.

Description

1. Technical field [0001] The invention relates to a digital signal down-conversion processing system based on a MIMO real-time test platform, which belongs to the technical field of digital signal processing. 2. Background technology [0002] With the rapid development of wireless Internet multimedia communication, the reliability and capacity of wireless communication systems need to be improved urgently. Therefore, a MIMO (Multiple-inputan and Multiple-output) system combining antenna transmit diversity, receive diversity, and space-time processing has become an inevitable trend in the development of wireless communication. MIMO will be the key technology that the new generation wireless communication system must adopt. Therefore, MIMO systems have become a research hotspot in recent years. In order to achieve the above research objectives, verify the results of theoretical research, complete the evaluation and verification of multi-antenna system performance, and build...

AI Technical Summary

Problems solved by technology

[0003] The existing MIMO test platform is a non-real-time system, and its digital down-conversion system uses DSP to complete the signal processing function, and uses MATLAB to generate and send baseband data and store it, and then the sending test platform sends the data, and the receiving test platform receives the data in real time And store it. After the sending cycle is over, use MATLAB to process the data. This process requires a large amount of storage, and the data cannot be completely sent and received in real time. Only the transmitter can send a part of the data. After the receiver has completely received it, send it The machine continues to send data

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