Time division multiplex transmitting/receiving system
US5432779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1994 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Apr 6, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A time division multiplex transmitting/receiving system converts a signal to be transmitted into a signal having a predetermined frequency in a predetermined time slot, which is transmitted as a transmission signal, and receives a transmitted signal having a frequency different from the frequency of the transmitted signal at another time slot different from the time slot of the predetermined frequency, and for demodulating this received signal. The time division multiplex transmitting/receiving system includes a fixed oscillator, a variable oscillator, a mixer, a modulator, a converter, a frequency divider, and a demodulator. The fixed oscillator outputs a first signal having a constant frequency. The variable oscillator outputs a second signal having a predetermined frequency within a predetermined band range. The mixer mixes the first signal with the second signal. The modulator directly modulates a signal to be transmitted by employing the mixed signal. The converter converts the received signal into the intermediate signal by employing the mixed signal. The frequency divider frequency-divides the first signal outputted from the fixed oscillator. The demodulator demodulates the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.