Title:
RADIO COMMUNICATION TERMINAL CAPABLE OF SPECIFYING BURST POSITION ACCURATELY AND HAVING SMALL FREQUENCY ERROR OF REGENERATIVE CARRIER WAVE
Document Type and Number:
WIPO Patent Application WO/2001/037505
Kind Code:
A1
Abstract:
A power calculator (19) calculates an input signal power according to components of input reception signals (I, Q). A comparator (20) asserts a non-modulation signal detection signal when a power calculated by the power calculator exceeds a preset threshold. A maximum value detector (41) detects a maximum power of input reception signals according to the assertion of the non-modulation signal detection signal and generates non-modulation signal position instruction information along with a maximum value detection signal; and frequency error calculators (42; 42, 50, 60, 70) calculate a carrier frequency error based on a reception signal corresponding to this maximum power. Since a non-modulation signal only is used to calculate a frequency error, an accurate frequency error can be calculated and an accurate non-modulation signal position can be detected.
Inventors:
DOI MASAYUKI (JP)
Application Number:
PCT/JP1999/006311
Publication Date:
May 25, 2001
Filing Date:
November 12, 1999
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
DOI MASAYUKI (JP)
DOI MASAYUKI (JP)
International Classes:
H04L27/16; H04L27/233; H04L27/00; (IPC1-7): H04L27/22
Foreign References:
| JPH11298546A | 1999-10-29 |
Attorney, Agent or Firm:
Fukami, Hisao (Minamimori-machi 2-chome Kita-ku Osaka-shi, Osaka, JP)
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