Dengwei Fu

Title: Innovations by Inventor Dengwei Fu

Introduction

Dengwei Fu is a notable inventor based in Sunnyvale, CA, with a focus on advancements in communication technology. He holds 2 patents that contribute significantly to the field of signal processing and power amplification.

Latest Patents

One of his latest patents is related to time domain transmitter signal shaping. This innovation addresses the challenge of high peak-to-average ratio in OFDM signals, which necessitates a large back-off from an RF power amplifier's saturation power. The spectral shaper device enhances the output power and efficiency of the power amplifier by performing linearization through digital predistortion. This process is based on an out-of-band regrowth limit and the EVM requirement for specific data rates. The shaper effectively distributes error energy over frequencies, ensuring that both in-band and out-of-band requirements are met independently. This maximization of allowable output power is crucial for the performance of nonlinear power amplifiers.

Another significant patent by Fu involves the calibration of communication processing paths. These paths often include distortions such as DC offset in the baseband analog path and local oscillator feed-through distortion. Fu's approach models these cascaded DC offset and nonlinear distortions using even-and-odd order polynomials. A loopback path from the output of distortion-causing devices passes through a measurement and calculation module, which computes the coefficients for predistortion polynomials. These coefficients are stored in a look-up table for use by a baseband predistorter, ensuring accurate calibration of the communication path.

Career Highlights

Dengwei Fu has worked with prominent companies in the technology sector, including Broadcom Corporation and Avago Technologies. His experience in these organizations has allowed him to develop and refine his innovative ideas in communication technology.

Collaborations

Throughout his career, Fu has collaborated with talented individuals such as Colin Fraser and Ali Afsahi. These partnerships have contributed to the successful development of his patents and innovations.

Conclusion

Dengwei Fu's contributions to communication technology through his patents demonstrate his expertise and innovative spirit. His work continues to influence advancements in the field, showcasing the importance of effective signal processing and power amplification.