Telecommunications – Transmitter and receiver at same station – With a common signal processing stage
Patent
1994-09-30
1998-05-26
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
With a common signal processing stage
455 332, 455 561, 455 59, 4552532, 375267, H04B 140
Patent
active
057582661
ABSTRACT:
The dual band code division multiple access radio of the present invention operates on multiple frequencies simultaneously on either transmit or receive. The transmit path operates by splitting the transmit intermediate frequency (IF) path (103) and mixing the IF to two different transmit frequencies using two frequency synthesizers (140 and 145). The receive path (104) has two RF channels (116 and 117) that are mixed with the frequencies generated by the synthesizers (140 and 145) and summed into one IF strip. Thus the radio of the present invention can perform a soft hand-off between frequencies while communicating with both base stations simultaneously. Additional mixing paths and synthesizers can be added if it is desired to communicate with more than two base stations simultaneously.
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Kornfeld Richard K.
Wheatley III Charles E.
Eisenzopf Reinhard J.
Martin Roger W.
Miller Russell B.
Nguyen Lee
Qualcomm Incorporated
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