IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0898295
(2001-07-02)
|
|
발명자
/ 주소 |
|
| 출원인 / 주소 |
- Phonex Broadband Corporation
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
1 인용 특허 :
45 |
초록
▼
A method and system for the synchronization of the transmission of digitally converted analog modem signals between two or more modems using either RF over-the-air or A/C power line communication channels. This invention provides for modem speed optimization my minimizing or eliminating clock varian
A method and system for the synchronization of the transmission of digitally converted analog modem signals between two or more modems using either RF over-the-air or A/C power line communication channels. This invention provides for modem speed optimization my minimizing or eliminating clock variance between the modems in a digital communication system. A fixed delay is created and maintained during modem operation. This invention is also adapted to function in a full-duplex communication system maintaining a fixed delay in both directions.
대표청구항
▼
The invention claimed is: 1. A method of synchronizing a digital transmission of analog modem signals, comprising: receiving, at a second modem, a first digital data signal from a first modem via a transmission medium, wherein: said first digital data signal is received serially, and said first dig
The invention claimed is: 1. A method of synchronizing a digital transmission of analog modem signals, comprising: receiving, at a second modem, a first digital data signal from a first modem via a transmission medium, wherein: said first digital data signal is received serially, and said first digital data signal comprises a first sample clock signal, said first sample clock signal comprising a first start bit representing a delay; detecting said first start bit by said second modem; generating, by said second modem, a first recreation clock signal based on said first start bit, wherein said first recreation clock signal comprises said delay; converting said first digital data signal to a first analog signal by a first digital-to-analog converter; generating, by said second modem, a second analog signal, said second analog signal comprises a second sample clock signal, said second sample clock signal comprising a second start bit; converting, by a first analog-to-digital converter, said second analog signal to a second digital data signal; and transmitting, by said second modem, said second digital data signal to said first modem via said transmission medium. 2. A method of synchronizing the digital transmission of analog signals, as recited in claim 1, wherein said transmission medium is an A/C power line. 3. A method of synchronizing the digital transmission of analog signals, as recited in claim 1, wherein said transmission medium is an over the air RF signal. 4. A method of synchronizing a digital transmission of analog signals, as recited in claim 1, further comprising: receiving, at said first modem, said second digital data signal from said second modem; detecting said second start bit by said first modem; generating, by said first modem, a second recreation clock signal based on said second start bit, wherein said second recreation clock signal comprises said delay; converting said second digital data signal to a third analog signal by a second digital-to-analog converter; generating, by said first modem, a fourth analog signal said fourth analog signal comprises a first sample clock signal, said first sample clock signal comprising said first start bit; converting, by a second analog-to-digital converter, said fourth analog signal to a said first digital data signal; and transmitting, by said first modem, said first digital data signal to said second modem via said transmission medium.
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