Power control for cdma communication systems
CA 2198373 C · Owner: Motorola, Inc. · Inventors: Ghosh, Amitava; Rohani, Kamyar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (Fig. 6). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (Fig. 6) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73 75, 77, 79). The results of the , comparisons are converted into a power control signal (74 76, 78, 80, 81) and , returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively an indicator of the , …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 10, 1996 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.