发明名称 |
Wireless reception system |
摘要 |
A wireless receiver for a PM (phase modulation) signal with a spectrum scrambling for relocation of speech spectrums for the privacy of purpose is comprised of an antenna for receiving PM modulated signals, an FM demodulator coupled with the antenna, a spectrum de-scrambler connected to output of the FM demodulator, an integration circuit connected to output of said spectrum de-scrambler, and an output terminal coupled with output of the integration circuit. Due to the location of the de-scrambler between the FM demodulator and the integration circuit, a noise spectrum of a reception signal is independent from a design of spectrum scrambling, and an excellent substantial S/N is obtained irrespective of spectrum scrambling.
|
申请公布号 |
US4726064(A) |
申请公布日期 |
1988.02.16 |
申请号 |
US19840656796 |
申请日期 |
1984.10.01 |
申请人 |
NIPPON TELEGRAPH & TELEPHONE PUBLIC CORPORATION |
发明人 |
KISHI, MASAHICHI;SEKI, SEIZO;KANMURI, NOBORU |
分类号 |
H04K1/04;(IPC1-7):H04L9/00 |
主分类号 |
H04K1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|