Programmable band select and transfer module for local multipoin

Details Programmable band select and transfer module for local multipoin Programmable band select and transfer module for local multipoin

1996-11-13

1998-08-04

Vo, Nguyen

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455114, 455118, 455307, 455314, H04B 104

Patent

active

057909598

ABSTRACT:
Transmit and receive programmable band select/transfer modules provide low cost means for selecting and translating spectral segments within sectors of a LMDS basestation. The modules are programmable to select spectral segments and translate the frequency of the selected segments to designated spectral positions in the sector's output signal. Each module shifts the frequency of an applied uwave signal to dispose a predetermined spectral segment about an IF frequency. The predetermined spectral segment is then selected using a fixed frequency filter at the IF frequency. The spectral segment has one of several bandwidths, selected by one of multiple fixed frequency filters in the modules. The module translates the frequency of the filtered spectral segment to dispose the selected spectral segment about an output frequency to provide the sector's output signal. An optional pilot signal or service channel may be summed with the filtered spectral segment prior to the frequency translation.

REFERENCES:
patent: 2671850 (1954-03-01), Marcou
patent: 3310740 (1967-03-01), Leysieffer
patent: 5115514 (1992-05-01), Leslie
patent: 5613234 (1997-03-01), Vella-Coleiro

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