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
Systems and methods for processing supplemental information associated with media programming
Lentiviral gene transfer vectors and their medicinal applications
Dehydratable hygiene articles
Method and apparatus for selective decoding in a wireless communication system
Heat retaining device
Semiconductor power amplifier
  Randomly Featured Patents
System for global flow field management using distributed, surface-embedded, nano-scale boundary layer actuation
Single pump lubrication and starter system
Electronic apparatus with hand-written pattern recognition function
Method and system for scripting interactive animated actors
Ergonomic handle for grooming brush
Device for use in making doughnuts
Method and apparatus for assessing left ventricular function and optimizing cardiac pacing intervals based on left ventricular wall motion
Durable data-tag with record duplication
Full facial shield assembly
Method and system to calibrate tunable lasers