Frequency division multiplex guardband communication system for

Details Frequency division multiplex guardband communication system for Frequency division multiplex guardband communication system for

1989-11-16

1991-04-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

375 1, 370 18, H04J 114, H04J 120

Patent

active

050051695

ABSTRACT:
A frequency division multiplex guardband communication system is provided which increases the communication capability of conventional FDM systems with negligible effect on overall system performance. The additional capacity is achieved through the use of guardbands which lie between the information bands of the FDM. To avoid interfering with recovery of the FDM information, the amount of new signal energy added to the individual guardbands is well below the guardband noise level.

REFERENCES:
patent: 3885217 (1975-05-01), Cintron
patent: 3969585 (1976-07-01), Boulanger
patent: 4425642 (1984-01-01), Moses et al.
patent: 4425661 (1984-01-01), Moses et al.
patent: 4703474 (1987-10-01), Foschini et al.
patent: 4763103 (1988-08-01), Galula et al.

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