Telecommunications – Carrier wave repeater or relay system – Two separate way transmission
Reexamination Certificate
2006-05-18
2009-12-01
Maung, Nay A. (Department: 2618)
Telecommunications
Carrier wave repeater or relay system
Two separate way transmission
C455S007000, C455S012100, C455S024000, C375S211000, C375S214000, C375S350000, C381S083000, C381S093000
Reexamination Certificate
active
07627287
ABSTRACT:
An on-channel repeater has a receiving antenna for receiving an RF signal and a transmitting antenna for transmitting on the same frequency as the input signal. An amplification path between the antennas provides substantially linear processing and includes a combiner, a decorrelating delay and a power amplifier. A filter estimator receives a reference signal and the combiner output and generates a plurality of control coefficients which are applied to an adaptive filter which filters the reference signal accordingly and applies its output to the combiner. The reference signal is derived not from the output of the decorrelating delay but rather from the output antenna after the power amplifier. Where there is an adjacent transmitter generating potentially interfering signals, the transmitter output is coupled to the same transmitter antenna.
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British Broadcasting Corporation
Daly, Crowley & Mofford & Durkee, LLP
Maung Nay A.
Tran Paul P
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