WIRELESS TELECOMMUNICATION MULTI-CARRIER RECEIVER ARCHITECTURE

Japanese Patent JP3737390

B2

PROBLEM TO BE SOLVED: To provide a receiver for a wireless telecommunication system, by which signal processing in a comparatively wide zone of a received signal is conducted without increasing the distortion of a signal and a large number of the received signals can be processed simultaneously.
SOLUTION: The receiver 10 contains a special LNA 16, a frequency down converter 18 and an ADC 20, and executes wide-zone signal processing, maintaining the performance of the receiver. The frequency down converter 18 uses a proper mixer 28, a BPA 32, an attenuator 34 and a transformer 36, and adjusts these equipment so as to conduct desired frequency down conversion and amplitude control in a desired wide zone. A down converter-device is selected in response to the specific performance criterion of the ADC. A special digital-channelizer 22 is contained in the receiver 10, a digital signal from the ADC 20 is received, and the signal is separated into a large number of channels.

JPH1168458

OSCILLATION CIRCUIT AND TUNER CIRCUIT USING THE SAME

Simmen Kay Claxton
Burt Kay Oyama
Eric El Upton
Barry Earl Allen
Mark Kintis
Andrew Dee Smith
Craig Earl Talbot
David Jay Brnone
Donald Earl Martin
William M. Cornes
Ronald P. Smith
Vincent Sea Moretti

JP2001195851A

January 18, 2006

June 28, 2001

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NORTHROP GRUMMAN CORPORATION

H04B1/26; H03D7/16; H03F3/189; H03K9/00; H03M3/02; H04B1/28; H04J1/04; (IPC1-7): H04B1/26; H04J1/04

JP2001028575A
JP2002534834A

Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Otsuka Naruhiko

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