G - Physics – 08 – B
Patent
G - Physics
08
B
325/31
G08B 5/22 (2006.01) G08B 3/10 (2006.01) H04L 1/18 (2006.01) H04Q 7/12 (2006.01)
Patent
CA 1285994
ABSTRACT OF THE DISCLOSURE An acknowledge back (ack-back) pager is provided for use in a paging system including a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back data on different frequency sub-bands, a different frequency sub-band being allocated to each of the pagers in the group. To accurately control the ack-back transmit frequency, the pager receives and down-converts the FRX signal thus producing a down-converted FC signal, the frequency of which is measured and stored. The pager selects which sub-band of a plurality of frequency sub-bands within a predetermined range of frequencies is to be used for transmission of the ack-back signal. The pager determines a frequency offset FD corresponding to the selected sub-band, such offset being with respect to a predetermined frequency within such range of frequencies. The pager generates an acknowledge back signal at a frequency (FC + FD) - FCTX and up-converts such signal to a transmit frequency FTX corresponding to said selected sub- band, FCTX being the frequency of a down-converted sample of the FTX signal.
582953
Keba James Michael
Siwiak Kazimierz
Steel Francis Robert
Gowling Lafleur Henderson Llp
Motorola Inc.
LandOfFree
Acknowledge back pager with apparatus for controlling... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acknowledge back pager with apparatus for controlling..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acknowledge back pager with apparatus for controlling... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1169748