Claims
- 1. A method of modulating a radio frequency carrier capable of transmitting a binary information stream made up of first and second binary states comprising:
generating a clock signal operating at the fundamental frequency of a carrier frequency to be modulated; clipping said clock signal sufficient to achieve a fifty percent duty cycle resulting in a clipped squarewave clock signal; modulating the clipped squarewave clock signal by the binary information stream by having the lower level of said clipped squarewave clock signal set by the lower clipped level and the higher clipped level of the clipped squarewave clock signal vary with the first and second binary states of the binary information stream creating a modulated clipped squarewave clock signal; smoothing said modulated clipped squarewave clock signal; and, filtering said modulated clipped squarewave clock signal to its base band sine wave component resulting in a modulated carrier frequency signal to be transmitted.
- 2. The method of claim 1 wherein:
the generation of said clock signal is accomplished by a local oscillator having an oscillator output at a select carrier frequency.
- 3. The method of claim 1 further comprising:
broadcasting said modulated carrier frequency signal by using a Time Division Multiple Access system.
- 4. The method of claim 1 further comprising:
broadcasting said modulated carrier frequency signal by using a Frequency Division Multiple Access system.
- 5. A system for modulating a radio frequency carrier capable of transmitting a binary information stream made up of first and second binary states comprising:
a clock signal generating means operating at the fundamental frequency of a carrier frequency to be modulated; a clipping means for clipping said clock signal sufficient to achieve a fifty percent duty cycle resulting in a clipped squarewave clock signal; a modulating means for modulating the clipped squarewave clock signal by the binary information stream by having the lower level of said clipped squarewave clock signal set by the lower clipped level and the higher clipped level of the clipped squarewave clock signal vary with the first and second binary states of the binary information stream creating a modulated clipped squarewave clock signal; a smoothing means for smoothing said modulated clipped squarewave clock signal; and, a filtering means for filtering said modulated clipped squarewave clock signal to its base band sine wave component resulting in a modulated carrier frequency signal to be transmitted.
- 6. The system of claim 5 wherein:
said generating means of said clock signal is a local oscillator having an oscillator output at a select carrier frequency.
- 7. The method of claim 5 further comprising:
a broadcasting means for broadcasting said modulated carrier frequency signal by using a Time Division Multiple Access system.
- 8. The method of claim 5 further comprising:
a broadcasting means for broadcasting said modulated carrier frequency signal by using a Frequency Division Multiple Access system.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims the benefit of previously filed co-pending Provisional Patent Application Serial No. 60/341,929, filed Dec. 19, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60341929 |
Dec 2001 |
US |