Motorola Corporation

3Com Corporation

Motorola Mobility LLC

Ming D Tan

Mang Zhu

Brian David Storm

Xiaoyong Yu

Qiang Guo

Xuping Zhou

Xing W Wu

A mobile wireless communications device and methods therefore, including receiving a signal (), storing a portion of the received signal (), identifying all possible pilot signals by determining slot boundary information for the stored signal portion (), determining frame boundary information and/or scrambling code information () of the stored signal portion by correlating the stored signal portion with the scrambling codes based on the slot boundary information. In other embodiments, the search is performed in real-time without storing the signal.

Frame synchronization and scrambling code indentification in wireless communications systems and methods therefor

A decoder equalizes a turbo coded signal with intersymbol interference by performing a decision-feedback equalization in each iteration of the turbo decoding process. In such iteration process, two recursion processors calculate soft output values for the information bits and the coded bits of the signal as well. Hard output values are derived from the soft output values. A decision feedback equalizer in an iterative loop of the decoder receives the hard output values uses these to provide a correction for the intersymbol interference. Thereafter, the decision feedback signal applies the correction signal to the input signal to minimize the intersymbol interference.

Turbo decoder with decision feedback equalization

A method and apparatus for increasing the speed of a Universal Asynchronous Receiver/Transmitter ('UART') while maintaining backward compatibility. The UART contains registers for controlling the flow of data. Two registers are the DLL (Divisor Latch Least significant) internal register and the DLM (Divisor Latch Most significant) internal register. Due to the UART not using all of the 16 bits contained in the DLL and DLM registers, an additional register, the Increased Baudrate (IB) register, is created. The IB register uses bits which are unused (or always set to zero in a conventional UART). Through the IB register, the UART may use higher crystal frequencies. In addition, when the UART is at speeds equal to or less than 115,200 bits per second, the IB register is programmed to zero, thus mimicking the operation of a convention UART at speeds equal to or less than 115,200 bits per second. Thus, the method and system for a high speed UART increases speeds while still maintaining backward compatibility.

System for operating a universal asynchronous receiver/transmitter

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Gurnee, IL, United States of America

Ming D Tan