Title:
受信機での中間周波数信号の直交エンベロープサンプリング
Document Type and Number:
Japanese Patent JP2004527187
Kind Code:
A
Abstract:
An apparatus and method for the two-dimensional direct intermediate frequency sampling of a received signal. A receiver is equipped with a circuit for converting a received radio frequency signal to an intermediate frequency signal. The converted intermediate frequency signal is sampled by a pair of lowpass analog-to-digital converters. The sampling scheme involves quadrature envelope sampling of the intermediate frequency signal. The sampling scheme further involves sampling the Q-channel signal at a quarter of the intermediate frequency carrier period after the I-channel signal is sampled.
Inventors:
Ipping, fan
Application Number:
JP2002592305A
Publication Date:
September 02, 2004
Filing Date:
May 22, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H03D7/00; H03D3/00; H04B1/26; H04B1/28; H04L27/38; H04L27/00; (IPC1-7): H04B1/26; H03D7/00
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
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