Samsung Electronics Co., Ltd.

Nortel Networks Corporation

John Alexander Interrante

William M Hurley

Lup Meng Loh

Michael Brobston

Yinong Ding

Jordan Charles Mott

Yaming Zhang

Seong-Eun Kim

Warren T Pottenger

WeonKi Yoon

Daniel D Lewallen

Tomas Perez Morales

An apparatus and method reduce distortion in a processed signal. The apparatus includes a first receive path, a second receive path, a summation unit, and a compensation unit. The first receive path is configured to process a received analog signal into a first digital signal. The second receive path is configured to process the received analog signal with a phase shift into a second digital signal. The summation unit is configured to sum the first and second digital signals to form a processed digital signal. The compensation unit is configured to identify a conjugate of the processed digital signal, apply a weighting factor to the conjugate of the processed digital signal to form a weighted signal, and subtract the weighted signal from the processed digital signal to reduce the distortion.

Digital I/Q imbalance compensation in a quadrature receiver

A system and method for minimizing a DC component of a received signal are disclosed. As one example, a system for minimizing a DC component of a signal in a wireless receiver is disclosed, which includes a programmable filter operable to filter the signal with at least one of a low cutoff frequency and a high cutoff frequency, and a transition unit coupled to the programmable filter, the transition unit operable to transition the programmable filter between the high cutoff frequency and the low cutoff frequency.

System and method for DC correction in wireless receivers

A reconfigurable RF transceiver for use in either a base station or a mobile station Of a wireless network. The reconfigurable RF transceiver comprises a first receive path that down-converts an incoming RF signal to analog and digital baseband signals. The first receive path in a first mode down-converts the incoming RF signal in a receive frequency band for the base station and in a second mode down-converts the incoming RF signal in a receive frequency band for the mobile station. The reconfigurable RF transceiver further comprises a transmit path for up-converting an outgoing baseband signal to an outgoing RF signal. The transmit path in the first mode up-converts the outgoing baseband signal in a transmit frequency band for the base station and in the second mode up-converts the outgoing baseband signal in a transmit frequency band for the mobile station.

Reconfigurable base station using mobile station RF ASIC

A system and method for configuring a wireless transceiver are disclosed. As one example, a system for configuring a wireless transceiver is disclosed, which includes a first data storage unit coupled to a configuration bus disposed in the wireless transceiver, a second data storage unit coupled to the configuration bus, a change detection unit coupled to the second data storage unit, the change detection configured to detect a change to a value stored in the second data storage unit, and output a signal responsive to the change, and a third data storage unit coupled to the first data storage unit, the second data storage unit, and the change detection unit. The third data storage unit is configured to store a plurality of predefined configuration data sets, and convey a predefined configuration data set to the first data storage unit responsive to the signal.

System and method for rapidly configuring wireless transceivers

A method for performing handover between multiple modes for a mobile station is provided. The method includes operating the mobile station in a first mode. A handover from the first mode to a second mode is performed using a single wireless receiver. The mobile station operates in the second mode after performing the handover.

Method and system for performing handover between multiple modes using a single wireless receiver

The present disclosure relates generally to systems and methods for direct current (DC) correction in wireless devices. In one example, a method includes setting a cutoff frequency of a filter at a first frequency, where a signal entering the filter is attenuated based on the cutoff frequency. If a qualified change is detected in a DC component of the signal, the cutoff frequency is set at a second frequency that attenuates more of the signal than the first frequency for a defined time period. The cutoff frequency may then be set to the first frequency after the defined time period.

Direct memory access packet router method and apparatus

A method and apparatus for monitoring the performance of an echo canceler within a telephone communications network is disclosed. In accordance with the method and apparatus of the present invention, an embedded echo-cancellation performance monitoring circuit comprises three separate units, namely, a test data injection unit, an echo path simulator unit, and a test data extraction unit. The test data injection unit is utilized to inject test data into a serial data stream intended for an echo canceler. The echo path simulator unit is utilized to simulate an echo path by attenuating the test data in the serial data stream and to loop the test data in the serial data stream back to the echo canceler. The test data extraction unit is utilized to extract the test data from a send-out data stream exiting from the echo canceler.

Growing community of inventors

Richardson, TX, United States of America

John Alexander Interrante