Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Reexamination Certificate
2005-10-18
2005-10-18
Maung, Nay (Department: 2684)
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
C455S114300, C455S501000, C455S127100, C375S298000, C375S340000
Reexamination Certificate
active
06957044
ABSTRACT:
A satellite communication apparatus has a corrector for reducing distortion of a signal in a communication channel. The corrector is formed by a forward model representative of a pre-calculated estimate of non-linearity and group delay of the satellite transmission/reception channel from the input to the up sampler through to the output of the down sampler. The forward model may also comprise a model of magnitude response of a satellite input multiplexer filter and output multiplexer filter. Cascaded identical stages of the corrector may be provided so that distortion in the channel is successively reduced towards zero by each successive stage. An initial approximator which is substantially the inverse of the distorting function of the forward model may be provided.
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Beech Brian Herbert
Edwards David G.
Perinpanayagam Ravin
Keefer Timothey J.
Maung Nay
Seyfarth Shaw LLP
Tandberg Television ASA
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