Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CDMA RECEIVER
Document Type and Number:
Japanese Patent JP2002043978
Kind Code:
A
Abstract:

To provide a CDMA receiver with which a stable reception characteristic is obtained by changing a method for calculating a phase shift compensation quantity depending on a state of a transmission channel.

The receiver adopting a DS(Direct-Spread)-CDMA mobile communication system that transmits spread data and a spread pilot signal and allows a receiver side to extract an amplitude phase shift amount from a pilot signal that is despread to correct despread data, is provided with a frequency error detection section 105-6 that detects a carrier frequency error, a frequency error averaging section 105-7, a compositing section 105-11 that composites frequency errors after averaging by each path, a base band AFC section 105-12 that uses the frequency error after the composition to compensate the carrier frequency, and an amplitude phase shift compensation quantity calculation section 105-10 that calculates a compensation quantity of an amplitude phase shift amount on the basis of a long range block SIR(Signal to Interference Ratio) and a fading frequency obtained from the amplitude phase shift amount.


Inventors:
ISHII TAKAHITO
Application Number:
JP2000228850A
Publication Date:
February 08, 2002
Filing Date:
July 28, 2000
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI INT ELECTRIC INC
International Classes:
H04B1/707; H04B1/7087; (IPC1-7): H04B1/707
Attorney, Agent or Firm:
Hisako Ishido (3 outside)