| With the people’s material culture and spiritual culture requirementsincreasing, the current rate of wireless communication is difficult to meet, so theresearch and development of the higher rate wireless communication systemshave been one of the focus topics in the communication session. The nextgeneration wireless communication system will implement new frequency bandsand multiple-input multiple-output (MIMO) transmission technology，but thechannel capacity of MIMO transmission system is constrained by the MIMOchannel characteristics, and the channel model is used to describe the MIMOchannel，so the MIMO channel model plays an important role in the MIMOsystem implementation. The theoretical analysis is used to study the MIMOchannel,but it can’t reflect the real characteristics of the channel. So it’simperative to measure the MIMO channel in the real environment, analysis thecharacteristics of MIMO channel, and establish the MIMO channel model.Channel measurement requires the support of the channel measurementhardware platform, and the core of the hardware platform is baseband dataprocessing module. The focus of this thesis is the hardware design of thebaseband data processing module, and FPGA implementation of the basebanddata processing. The platform can measure the signal whose frequency band is6GHz, bandwidth is200MHz. These spectrum resources are relatively abundant,and can meet the high transmission rate. The hardware platform includes a powermodule, a signal sampling module, a signal processing module, a signalgeneration module and a clock signal driver module. The power module providesthe power to the other five modules and ensures the stable operation of thehardware platform. The signal sampling module converses the space signal fromanalog to digital, and the data is prepared for the signal processing. The signalprocessing module is the core of the data processing in the channel measurementplatform, the baseband data processing will be implemented on the module. Thesignal transmission module is to transfer large amounts of data processed to thechassis. The signal generation module generates the pseudo-random sequence.The clock driver module provides the stable high-frequency clock to the signalsampling module and the signal generation module.The sliding correlator of serial synchronous technology is used to processthe baseband data, and the synchronization code is the m-sequence. In this paper,the theoretical analysis and simulation of m sequence generation, autocorrelation, and the sliding correlation method are implemented. Meanwhile, the slidingcorrelator is verified on the FPGA. The results show that the sliding correlatorwhich is implemented on baseband module can effectively extract the impulseresponse of the wireless channel. |
