Title:
TRANSMITTER
Document Type and Number:
Japanese Patent JP2829282
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce S/N deterioration owing to the transmission wave of a wide band width transmission wave by setting a transmission signal which is outputted from a transmission side to a value for generating its spectrum amplifying quantity and previously grasped and estimated transmission path performance so as to be output it.
SOLUTION: Transmission information S1 is spread from a spread code generating device 13 by a spread signal in a balanced modulator 11 so as to be a transmission signal S2. The signal S2 becomes the transmission signal S3 by a carrier wave from a carrier wave oscillator 14, which is modulated in the balanced modulator 12 and spectrum reinforced. The output signal S7 is transmitted from an antenna A1. The signal S7 from a transmitter is received by the antenna A2, reception wave is amplified by a high frequency amplifier 21 and it is outputted as the signal S9 from a spectrum corrector 26. The signal S9 is corrected so that spectrum deterioration is reduced. The signal S9 is reversely spread by a spread code sign from the spread code generator being the same as that of the transmission side in the balanced modulator 22 and baseband-demodulated 23.
Inventors:
SUGA KAZUTOSHI
OOIZUMI JUNICHI
OOIZUMI JUNICHI
Application Number:
JP23162296A
Publication Date:
November 25, 1998
Filing Date:
September 02, 1996
Export Citation:
Assignee:
HITACHI SEISAKUSHO KK
International Classes:
H04B1/707; H04J13/00; (IPC1-7): H04B1/707
Domestic Patent References:
| JP594350A | ||||
| JP596631A | ||||
| JP57123779A | ||||
| JP5397747A | ||||
| JP50126314A | ||||
| JP5116730B1 |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)