Title:
DATA COMMUNICATION EQUIPMENT
Document Type and Number:
Japanese Patent JP3045937
Kind Code:
B2
Abstract:
PURPOSE: To attain the transmission of a signal with a small power at a low error rate by setting a carrier frequency set by a frequency conversion circuit to be a frequency with a small number of simultaneous communication channels based on a carrier frequency with a small interference level.
CONSTITUTION: The information sent from an external voice encoder or the like are converted by a frequency conversion circuit 10 into a desired carrier frequency in a transmission section 8 and sent from a transmission antenna 9. In the case of the transmission in which a low error rate is required, the frequency conversion circuit 10 sets a transmission frequency of a data transmission channel to a frequency with a small number of simultaneous communication channels based on a carrier frequency with a small interference level sought by an interference measurement circuit 7 built in a reception section 1 with an instruction of an information transmission classification setting circuit 14. Then the information related to the transmission frequency of the data transmission channel is reported to a reception section being an object of data transmission through a common control channel in which a frequency and a spread code are set fixedly.
Inventors:
Taku Nagase
Osamu Kato
Osamu Kato
Application Number:
JP27163994A
Publication Date:
May 29, 2000
Filing Date:
November 07, 1994
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04B7/26; H04J13/00; H04W88/06; (IPC1-7): H04Q7/38; H04B7/26; H04J13/02
Domestic Patent References:
| JP6334630A | ||||
| JP6232804A | ||||
| JP548520A |
Attorney, Agent or Firm:
Yoshihiro Morimoto