Design And Realization Of The Verification Platform For The Wireless Receiver Based On Universal Verification Methodology

With the development of semiconductor technology and wireless communication technology,the integration and complexity of chips are becoming higher and higher.The mixed-signal design of the digital circuits and analog circuits has become the development trend of chip design.As a typical mixed-signal circuit,the wireless receiver module often fails due to the function error of the digital-analog interface and the function error of the RF analog circuit.To solve these problems,this paper proposes an efficient mixed-signal verification method to ensure the functional correctness of the chip,realize the full verification of the mixed-signal chip before tape-out,and improve the success rate of tape-out.Based on the wireless receiver module,this paper develops a complete verification scheme and carries out mixed-signal verification.Firstly,unit verification is carried out on the functional submodule of the digital channel processing module in the wireless receiver module.The unit Verification platform is built based on Universal Verification Methodology(UVM),and a MATLAB algorithm model is adopted as the platform reference model.The reusability of unit verification platform components is optimized.Then,the integration verification platform of the digital channel processing module is built by using unit verification platform components to complete the functional verification of the digital circuit in the wireless receiver.Secondly,modeling the front-end analog circuit of wireless receiver,converting the analog circuit into a real number model which is realized by System Verilog language and represented by logic gates.Finally,the mixed-signal verification platform of wireless receiver is established based on the existing integration verification platform,and the digital-analog interface of the wireless receiver is simulated and verified by digital circuit simulation tools and MATLAB.MATLAB performs a fast Fourier transform on the simulation output results of the verification platform.The spectrum diagram output from MATLAB can intuitively reflect whether the simulation output signal frequency of wireless receiver is consistent with the expected,and judge the functional correctness of the digital-analog interface of the module.After a large number of test cases are simulated correctly,the coverage of the wireless receiver module is collected.The collected code coverage reaches 100%,and there is no uncovered code.Function coverage reaches 100%,all function points are covered,and test points extracted from each module are covered.In order to accelerate the convergence of coverage,this paper adopts unit verification platform to collect coverage with slow convergence of the integration verification platform,and takes the coverage collected by the unit verification platform as a supplementary description of the part of the integration verification platform with slow convergence and difficult coverage.For the mixed-signal verification,the spectrum diagram of each test case simulation output is consistent with the expected result,the digital-analog interface function is correct,and the function verification of the wireless receiver module is completed.