Bi-directional communication channel

Details Bi-directional communication channel Bi-directional communication channel

2011-05-24

2011-05-24

Kumar, Pankaj (Department: 2467)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

Reexamination Certificate

active

07948865

ABSTRACT:
In a unidirectional or broadcasting communication system using OFDM transmission from a base station to subscriber units, a device for achieving a bi-directional channel comprising: A. a transmitter in the subscriber units for transmitting signals that are orthogonal to signals transmitted from the base station and are also orthogonal to signals from other subscriber units; B. a receiver in the base station for receiving and processing together signals from a plurality of subscriber units; C. a controller for allocating to each subscriber unit several carriers that are separated from each other (not adjacent to each other).

REFERENCES:
patent: 5726978 (1998-03-01), Frodigh et al.
patent: 6005876 (1999-12-01), Cimini et al.
patent: 6185257 (2001-02-01), Moulsley
patent: 6188717 (2001-02-01), Kaiser et al.

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