Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A power line communication (PLC) apparatus comprising: an input buffer for accepting input data from a data source; a modulation circuit, coupled to said input buffer, for generating a carrier signal at a predetermined frequency, said predetermined frequency being between interference harmonics, said modulation circuit further including a circuit for modulating said input data at a predetermined symbol duration with said carrier signal, said modulation circuit further including a waveshaping memory for storing a digital representation of said carrier signal, said predetermined carrier signal frequency and said predetermined symbol duration being arbitrarily selectable based on the digital information stored in said waveshaping memory; a transmitter, coupled to said modulation circuit, for transmitting said modulated input data on a power line, said modulated data being transmitted between said interference harmonics; a receiver for receiving said modulated data on said power line; and a filter means, coupled to said receiver, for filtering said modulated data to reject said interference harmonics while accepting said input data.
Claim 2
Dependent Claim
163 words
A power line communication (PLC) apparatus comprising: an input buffer for accepting input data from a data source; a modulation circuit, coupled to said input buffer, for generating a carrier signal at a predetermined frequency, said predetermined frequency being between interference harmonics, said modulation circuit further including a circuit for modulating said input data at a predetermined symbol duration with said carrier signal, said modulation circuit further including a waveshaping memory for storing a digital representation of said carrier signal, said predetermined carrier signal frequency and said predetermined symbol duration being arbitrarily selectable based on the digital information stored in said waveshaping memory; a transmitter, coupled to said modulation circuit, for transmitting said modulated input data on a power line, said modulated data being transmitted between said interference harmonics; a receiver for receiving said modulated data on said power line; and a filter means, coupled to said receiver, for filtering said modulated data to reject said interference harmonics while accepting said input data.
Claim 3
Dependent Claim
22 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said waveshaping memory is a waveshaping read only memory (ROM).
Claim 4
Dependent Claim
27 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said waveshaping memory for storing said digital representation of each phase of said carrier signal.
Claim 5
Dependent Claim
28 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said waveshaping memory further comprises means for storing a digital representation of a raised cosine waveform.
Claim 6
Dependent Claim
36 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said waveshaping memory further comprises means for storing a digital representation of a carrier signal for avoiding said interference harmonics in NTSC television receivers.
Claim 7
Dependent Claim
57 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said waveshaping memory further comprises means for storing a digital representation of a first carrier signal and a second carrier signal, said first carrier signal for avoiding interference harmonics in NTSC television receivers, said second carrier signal for avoiding interference harmonics in non-NTSC television receivers.
Claim 8
Dependent Claim
34 words
The power line communication (PLC) apparatus as claimed in claim 6 wherein said receiver further includes a circuit for demodulating one of said input data using one of said first and second carrier signals.
Claim 9
Dependent Claim
39 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said filter means includes a pair of low pass filter circuit wherein each of said filter circuit for attenuating a predetermined frequency associated with said interference harmonics.
Claim 10
Dependent Claim
48 words
The power line communication (PLC) apparatus as claimed in claim 8 wherein each of said filter circuit further includes two low pass filters for each of two predetermined carrier signals, each of said low pass filter attenuating one of two predetermined frequencies ranges associated with said interference harmonics.
Claim 11
Dependent Claim
33 words
The power line communication (PLC) apparatus as claimed in claim 1 wherein said modulation circuit further includes a circuit for generating a plurality of redundant carrier signals, each being between said interference harmonics.