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 4 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
Network attachment for IMS systems for legacy CS UE with home node B access
Data communication system, data transmitting apparatus, data transmitting method, and method for determining packet size and redundancy
Optical module for a microlithography objective including holding and supporting devices
System of providing an internet web site that assists medical professionals draft a letter of medical necessity or other documentation for transmission to a third party payer on behalf of a pa
Matching a usage history to a new cloud
Down-drawable, chemically strengthened glass for cover plate
Vertical axis wind turbines
  Randomly Featured Patents
Ceiling fan
Surgical connection apparatus and methods
Molecules of the NBS/LRR protein family and uses thereof
Reactive asymmetrical dicarboxylic acid esters and reagents for the investigation of cardiac glycosides
Corneal implant and method of manufacture
Postage meter having an automatic slogan sub-module
Gassed emulsion explosive
Methods of treating fragile X syndrome
System and method for incremental and continuous data compression
Holder for cards