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POWER CONTROL IN A TDD SYSTEM Disclosure Number: IPCOM000008403D
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2002-Jun-12

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Randall Hillock


In a TDD system the radio transmits and receives on the same frequency. The transmission and reception are offset in time. Depending on the band of operation and regulatory concern, there exists a need for monitoring and controlling the power output of the transmission. For some PCS systems being employed at 1.9 GHz power accuracy is being specified at +l/-3 dB. In the ISM band the FCC specifies max E.R.I.P. of 36 dBm. For portable equipment operating at 100 mW power level one would not need power control to meet this regulatory requirement. However, to optimize coverage and performance it would be an advantage to keep out- put power as consistent over frequency and supply voltage as possible.