Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Multichannel wideband digital receiver making use of multiple wideband tuners having individually selectable gains to extend overall system dynamic range










Image Number 5 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
Navigational cube for matching vendor offerings to service provider requirements
Mobile device case with storage compartment
Quantum dot template for fast and simultaneous detection of different infectious agents
Global codebook for coordinated multi-point processing
Method for preventing wheat from mycotoxin contamination
Method and apparatus for managing communication services for user endpoint devices
Programming of DIMM termination resistance values
  Randomly Featured Patents
Addition of metal layers with signal reallocation to a microprocessor for increased frequency and lower power
Carved solid face door having a window formed therein and methods of fabrication
Recording apparatus, recording method, storage medium, program and communication apparatus
Plasma processing method and apparatus
Sphingolipids
Method for predicting sepsis or an acute infectious inflammatory response
Polymer gel contact masks and methods and molds for making same
Mopping system
Colored contact lens and method of making same
Medicament cartridge