Multiple access method, devices for performing this method and communications systems using these methods
US6744824B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2000 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multiple access method for use in a point to multipoint communications network includes a step of allocating a respective unique variable (&rgr;1, . . . , &rgr;i, . . . , &rgr;n) to each respective network terminal of this communications network, a first all-pass filtering operation on at least one oversampled symbol which is derived from upstream information to be transmitted by a terminal (T1;Ti) to a central station (CS) of said communications network, a next step of filtering a received oversampled symbol stream at said central station (CS) for enabling said central station to discriminate therefrom said at least one oversampled symbol that was earlier transmitted by said network terminal (T1;Ti) to said central station (CS), said all-pass filtering operation having a z-transform transfer function ({overscore (c)}i(z)) such that the zeroes thereof correspond to said respective unique variables assigned to all other network terminals, except the unique variable (&rgr;1;&rgr;i) assigned to said network terminal (T1;Ti), whereby said next step of filtering consists of performing the z-transform on said received oversampled symbol stream, and of evaluating said z-transform at the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.