Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FRAME SYNCHRONIZATION METHOD
Document Type and Number:
Japanese Patent JP3894631
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To immediately execute frame synchronization from a reception data string by performing the frame synchronization by using a maximum likelihood rule, completing the frame synchronization and performing frequency synchronization and phase synchronization after the frame synchronization.
SOLUTION: Received high frequency signals are mixed with the beat frequencies (plural) mutually phase shifted for 90 degrees of a carrier wave oscillator 6 in two mixers 4 and 5 and returned to a base band. For the base band signals, successively, a clock frequency is sampled in a clock generator 7. The sampling rate is required to be high enough for satisfying a sampling theorem. Then, the frequency of the oscillator 6 is accurately set to a carrier wave frequency on a transmission side accompanying the allowable deviation of 50% at the maximum of a code rate. Then, the frame synchronization is achieved by using a maximum likelihood theorem and the frame synchronization is completed before performing the frequency and phase synchronization.


Inventors:
クルト シユミツト
Application Number:
JP1997000301394
Publication Date:
March 22, 2007
Filing Date:
September 25, 1997
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ROHDE & SCHWARZ GESELLSCHAFT MIT BESCHRANKER HAFTUNG & COMPAGNIE AKTIENGESELLSCHAFT
International Classes:
H04L27/38; H04J3/06; H04L7/00; H04L27/22; (IPC1-7): H04L27/38; H04L7/00; H04L27/22
Foreign References:
US5151926
Attorney, Agent or Firm:
田中 光雄
石野 正弘
川端 純市
東島 隆治