Yi Xien Yap

Title: Yi Xien Yap: Innovator in Scrambling Sequence Technology

Introduction

Yi Xien Yap is a notable inventor based in Potters Bar, GB. He has made significant contributions to the field of telecommunications, particularly in the area of scrambling sequence technology. With a total of 3 patents to his name, his work has advanced the understanding and implementation of downlink control information vectors.

Latest Patents

Yi Xien Yap's latest patents focus on recovering scrambling sequence initialization from frozen bits of an uncoded downlink control information vector. In one of his inventions, a device receives a downlink signal from a base station and constructs a frozen decode matrix for decoding frozen bits from the data of the downlink signal. The device also constructs a linear feedback shift register (LFSR) generator matrix for a component of scrambling sequence seed bits. By multiplying the frozen decode matrix and the LFSR generator matrix, a mapping matrix is generated to map a value of a scrambling sequence initialization vector that initializes a scrambler to the frozen bits. The device determines an inverse matrix of the mapping matrix and multiplies it with the frozen decode matrix to obtain a final matrix. This final matrix is utilized to recover the scrambling sequence seed bits used to initialize the component and perform actions based on these bits. Another patent involves determining an input-output relation of polar encoding based on a vector of the downlink signal, performing an interleaving operation, and utilizing rate matching to determine a scrambling sequence of the downlink signal.

Career Highlights

Yi Xien Yap is currently employed at Viavi Solutions Inc., where he continues to innovate and develop technologies that enhance communication systems. His expertise in scrambling sequences has positioned him as a valuable asset in the telecommunications industry.

Collaborations

Some of his notable coworkers include Onur Dizdar and Matthew David Brown, who contribute to the collaborative environment at Viavi Solutions Inc.

Conclusion

Yi Xien Yap's contributions to scrambling sequence technology demonstrate his commitment to advancing telecommunications. His innovative patents reflect a deep understanding of complex systems and a drive to improve communication methods.