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 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
Rechargeable battery including a channel member
Etching composition
Display screen with an animated graphical user interface
Vehicle, toy, and/or replicas thereof
Compact semiconductor memory device having reduced number of contacts, methods of operating and methods of making
Solid-state image sensing apparatus and electronic apparatus
Data security for dynamic random access memory using body bias to clear data at power-up
  Randomly Featured Patents
System for installing image sensing program
Tilt locking seat belt retractor
Substituted 5H-pyrimido[5,4-B]indoles, method for the production thereof and use thereof for treating non-solid malignant tumors of the blood-producing system
Method and apparatus for automatic time correction of a mechanical clock
Antibodies specific for human pancreatitis associated protein
Golfing iron club and manufacturing method thereof
Siding gauging tool
Floor lamp
Stem cell cultivation devices and methods
Portable holder for beverage containers