Title:
TRANSMITTER/RECEIVER
Document Type and Number:
Japanese Patent JPH1155149
Kind Code:
A
Abstract:
To suppress reception sensitivity degradation due to changes in the surrounding temperature.
A frequency (f) of a local oscillation frequency signal 7 is changed as in tests from f0 by Δfs through a frequency correction discriminating part 10 and a frequency-correcting part 9, a BER value at each frequency (f) is measured, and the frequency providing a most satisfactory BER value is selectively set as the frequency of the local oscillation frequency signal 7. Moreover, the frequency (f) of the local oscillation frequency signal 7 is testing changed from f0 by Δfs, until the BER value more satisfactory then a prescribed threshold value is provided.
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Inventors:
TAKEMURA RIKIO
Application Number:
JP21185597A
Publication Date:
February 26, 1999
Filing Date:
August 06, 1997
Export Citation:
Assignee:
NEC CORP
International Classes:
H03J7/04; H04B1/26; H04B1/40; H04B17/00; H04L27/00; (IPC1-7): H04B1/40
Domestic Patent References:
| JPS5938564A | 1984-03-02 | |||
| JPS62261861A | 1987-11-14 | |||
| JPS6280452A | 1987-04-13 |
Attorney, Agent or Firm:
Masaki Yamakawa