復調された受信信号から複素数データサンプルを生成する受信機において同調周波数オフセットを決定する方法および無線LAN受信機

Japanese Patent JP4154570

B2

A receiver produces complex data samples from a demodulated received signal. The data samples, which may form a preamble identifying a wireless LAN data burst, are arranged in a sequence comprising sub-sequences having a predetermined relationship with each other. A tuning frequency offset is determined by delaying the complex data samples by a plurality of different delay periods, auto-correlating the complex data samples using said different delay periods in order to produce respective auto-correlation outputs, determining a plurality of phase-dependent values each dependent upon phase errors in a respective auto-correlation output and calculating a value representing frequency offset by combining the phase-dependent values in a weighted manner. The preamble can be recognised by using the same delay means. One matched filter is used to detect a particular sub-sequence, the output is fed to the delay means, and a second matched filter receives the outputs of the delay means to detect sub-sequences having the correct timing relationship.

JP2000341240	TRANSMITTER AND RECEIVER FOR OFDM COMMUNICATION SYSTEM
JP2006514488	Cellular signal enhancer
JP2001320306	METHOD AND DEVICE FOR COMMUNICATING POWER LINE DATA

Stephen Kingsley Burton
Robert Bernard Heaton

JP2002224993A

September 24, 2008

August 01, 2002

Click for automatic bibliography generation  

MITSUBISHI ELECRIC INFORMATION TECHNOLOGY CENTRE EUROPE B.V.

H04J11/00; H04L27/22; H04B7/26; H04L7/00; H04L7/04; H04L7/08; H04L12/28; H04L27/26; H04W56/00; H04W84/12

JP2863747B2
JP9307599A
JP2000165341A
JP2000148681A
JP10117178A
JP11308193A
JP9200176A
JP2000224132A
JP2000188583A

WO2000059147A1
US5727018

Michiharu Soga
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Taizo Shiraishi

Previous Patent: 画像圧縮伸長装置

Next Patent: STRETCHABLE AIR BAG CUSHIONING MATERIAL SHEET EQUIPPED WITH SELF SEAL TYPE BLOW-IN TUBE AND ITS MANU...