• 5G NR L1 DL RX software development

• L1/RF verification and calibration platform (ATE) development ￭ Developed excel parsing tools and SA/SG control modules (R&S FSW43/SMW200A, Keysight VSA89600/M90XA/E6640A) in ATE with Python ￭ Built test cases for internal/factory regression test which included 3GPP TS38.141 RF tests, ORAN interface tests and L1 data correctness tests ￭ Trouble shooting and bug fixed in BBU/RRH during regression test• Maintenance of TCU/GPS/M-plane modules in 5G NR RRH

• 5G NR gNodeB L1 SW development on Intel FlexRAN platform ￭ Implemented DL SS/PBCH and PDSCH and do optimization by using Intel AVX256 / AVX512 instruction sets ￭ Did PHY DL fixed-point implementation for further optimization ￭ Verified PHY DL modules and flow and do cycle count profiling by TestMAC (TTBox MLog) and TestHOST ￭ Did algorithm breakdown and complexity analysis for 2X2 MMSE MIMO detector and optimize it with Intel AVX2 instruction sets ￭ Designed… Show more • 5G NR gNodeB L1 SW development on Intel FlexRAN platform ￭ Implemented DL SS/PBCH and PDSCH and do optimization by using Intel AVX256 / AVX512 instruction sets ￭ Did PHY DL fixed-point implementation for further optimization ￭ Verified PHY DL modules and flow and do cycle count profiling by TestMAC (TTBox MLog) and TestHOST ￭ Did algorithm breakdown and complexity analysis for 2X2 MMSE MIMO detector and optimize it with Intel AVX2 instruction sets ￭ Designed UL HARQ scenario and verify PUSCH HARQ combine with FlexRAN UE emulator and Keysight signal generator ￭ Modified L1 UL and DL modules for multi-core processing and verify with TestMAC ￭ Applied BBU pool framework in PHY task scheduling to reduce processing time ￭ Integrated FlexRAN with O-RAN interface• 5G NR PHY platform Integration with DPDK and RRH ￭ Integrated FlexRAN DL DPDK radio mode and build loopback test in TestMAC ￭ Built DL radio test platform (BBU -> RRH -> RF -> SA) and do verification by Keysight VSA89600 and TM500 UE emulator• 5G NR gNodeB layer 1/2 integration task ￭ Defined L1/2 interface for DL channel and do related API coding in FlexRAN ￭ Did downlink L1/2 integration test by VSA89600 and TM500 UE emulator ￭ Built DL HARQ behavior check tests under CU/DU/PsuedoPHY test framework Show less

• Leadership experience in LTE PHY data correctness task ￭ Led a group to do PHY spec. data correctness task in MT6292/6293 project, including TX/RX/TRX PHY testmode coding, test cases design, ATE test platform development and issue debugging in sanity test

• LTE Modem Evaluation Board (EVB) and FPGA PHY layer verification ￭ Developed testing tools and platforms for verification with C# and Tcl ￭ Verified the correctness of PHY spec. implementation and algorithm of TX module in LTE modem ￭ Collaborated with SW and FW RD to debug PHY modem issues• Sanity test cases development ￭ Established sanity test cases (patterns) for data correctness, PHY layer procedure and module level performance check ￭ Developed… Show more • LTE Modem Evaluation Board (EVB) and FPGA PHY layer verification ￭ Developed testing tools and platforms for verification with C# and Tcl ￭ Verified the correctness of PHY spec. implementation and algorithm of TX module in LTE modem ￭ Collaborated with SW and FW RD to debug PHY modem issues• Sanity test cases development ￭ Established sanity test cases (patterns) for data correctness, PHY layer procedure and module level performance check ￭ Developed automatic test environment with Tcl, C# and Excel to reduce testing and debugging time• Benchmarking ￭ Developed benchmark cases on R&S MLAPI platform with C ￭ Benchmarked and analyzed LTE modem PHY layer throughput performance, CSI reporting and RF characteristics• LTE PHY Spec. conformance and fixed point design ￭ Simulated all channels and signals in LTE PHY spec. with MATLAB and verify the correctness by parsing signals with Sanjole Wavejudge (sniffer) ￭ Designed fixed point format and do architecture coding for RX-DFE function in LTE modem Show less