Digital radio system including repeater equipment, end equipment

Details Digital radio system including repeater equipment, end equipment Digital radio system including repeater equipment, end equipment

1996-04-08

1999-02-23

Vo, Don N.

Pulse or digital communications

Repeaters

375348, 375347, H04B 336

Patent

active

058752099

ABSTRACT:
A digital radio system able to efficiently maintain transmission quality, provided with repeater equipment including a plurality of pairs of regenerating units for individually receiving waves of upstream and downstream routes at repeating points of redundantly configured radio transmission lines formed under a full duplex mode and demultiplexing and extracting the transmission information and control information multiplexed in the received wave. The digital radio system further includes a plurality of pairs of repeating units for multiplexing the transmission information and controlling information individually extracted by the plurality of pairs of regenerating units and relaying the multiplexed information to the following repeater sections through the redundantly configured radio transmission lines. A plurality of intersymbol interference measuring units are provided for individually measuring the degree or frequency of intersymbol interference of received waves for one of the upstream and downstream routes, the repeating units corresponding to the one upstream or downstream route among the plurality of pairs of repeating units further including units for multiplexing the transmission information and control information individually extracted by the regenerating units corresponding to that one route among the plurality of pairs of regenerating units with information indicative of the degree or frequency of intersymbol interference.

REFERENCES:
patent: 4766606 (1988-08-01), Bardutz et al.
patent: 5291519 (1994-03-01), Tsurumaru
patent: 5303261 (1994-04-01), Junod et al.
International Telecommunication Union (ITU) Telecommunication Standardization Sector Study Group 13 -- Contribution 4, COM 13-4-E, "Recommendation G.826: Error Performance Parameters and Objectives for International, Constant Bit Rate Digital Paths At or Above the Primary Rate," Mar. 1993, pp. 1-19.
Meyer, J., "Implications of Draft New ITU-T Recommendation G.826 on Digital Radio-Relay Systems," Radio Relay Systems, Oct. 11-14, 1993, Conference Publication No. 386, pp. 21-28.

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