Enhanced return path performance using modulation-based alignment criteria
US7684341B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2002 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Jan 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of allocating power among a plurality of signals, at least two of the signals employing different signal formats, located on different channels of the return path of a cable data network, divides a total power available for the signals on the return path in accordance with a minimum value of an average BER for all the signals and allocates power to each of the signals in accordance therewith. Specifically, a number of parameters are obtained including modulation type and symbol rate for each signal format employed on the return path, the AWGN noise floor across the reverse link, the nominal maximum available RF power for transmitting signals on the reverse path. A predetermined BER expression for each of the modulation types employed on the return path is then obtained, each of the expressions requiring a plurality of input values that includes the above-noted parameters. An expression is then formulated for an average BER based on the predetermined BER expressions and on a number of channels of each signal format type associated with a corresponding BER expression. The power to be allocated to each signal format by minimizing the average BER is then calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.