Resources Contact Us Home
Multichannel wideband digital receiver making use of multiple wideband tuners having individually selectable gains to extend overall system dynamic range

Image Number 3 for United States Patent #5590156.

A technique for extending the instantaneous dynamic range available in a wideband digital basestation for use in a wireless communication network. The basestation processes the bandwidth allocated to it in two or more sub-bands. The sub-bands are each processed by a digital tuner section consisting of an amplifier, analog-to-digital (A/D) converter, and digital filter bank. The digital filter bank may make use of multirate digital signal recovery techniques for efficient implementation. In operation, a received signal strength indication (RSSI) is first determined for each subscriber unit requesting access to the basestation. A channel assignment controller then assigns a transmit frequency to the subscriber unit depending upon this RSSI. In particular, subscriber units exhibiting a relatively stronger RSSI are to transmit on a frequency assigned to a first digital tuner section, while subscriber units having a relatively weak RSSI are assigned to a second digital tuner section. The gains of the first and second tuner sections of each other adjusted independently, to insure that the relatively strong signals are not clipped by the first tuner section, and that the relatively weak signals may be correctly detected by the second tuner section. The net effect is to provide a much greater overall system dynamic range. The invention can be used to advantage in both existing AMPS type cellular systems as well as CDMA systems.

  Recently Added Patents
Method for the synthesis of an array of metal nanowire capable of supporting localized plasmon resonances and photonic device comprising said array
System and method for receiving MBMS broadcasting service
Systems and methods for tracking mobile terrestrial terminals for satellite communications
System and method for improving cache efficiency
Group control method for machine type communication and mobile communication system using the method
Memory component and memory device
Techniques for image segment accumulation in document rendering
  Randomly Featured Patents
Method for manufacturing magnetostrictive torque sensor
Image processing method and apparatus
Method for manufacturing resettable fuses and the resettable fuse
Moment bender transducer drive
Implantable biosensor from stratified nanostructured membranes
Pad structure for liquid crystal display and method of manufacturing thereof
Permeation installation
Methods and systems for deploying hardware files to a computer
Identification plate for network cabinet