Resources Contact Us Home
Wireless telecommunications multi-carrier receiver architecture

Image Number 12 for United States Patent #6813320.

A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band. In an alternate embodiment, the frequency down-conversion is performed in a double down-conversion process so that a less complex ADC (62) can be used.

  Recently Added Patents
Method for determining the local position of at least one mobile radio communication device based on predetermined local positions of adjacent radio communication devices, associated radio com
Method and apparatus for visual neural stimulation
Method and system for remapping processing elements in a pipeline of a graphics processing unit
Anti-GITR antibodies
Method of manufacturing semiconductor devices using ion implantation
Apparatus and method to simulate a power trip to a disk drive
Vehicle hood
  Randomly Featured Patents
Damped control of a micromechanical device
Retractable hard top
Point level switch
Communication interface
Mode selection technique for onboard energy management
Flat configuration cathode ray tube
Process for producing a flat glass on a molten metal bath
Sealing slide fastener
Semi-sacrificial diamond for air dielectric formation
Penis-clamping device for the incontinent