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US 11,824,597 B2Granted
Robust mode for power line communications
AssigneeTexas Instruments Incorporated
InventorsIl Han Kim, Tarkesh Pande, Anuj Batra
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Abstract
Embodiments include methods of powerline communications using a preamble with band extension is provided. A method may include receiving a packet data unit PDU. Bit-level repetition is applied to at least a portion of the PDU to create a repeated portion. Interleaving is performed per a subchannel. Pilot tones are inserted in the interleaved portion. Each data tone is modulated with respect to a nearest one of the inserted pilot tones. The PDU is transmitted over a power line.
Claims20
A method comprising:
- performing a cyclic redundancy check (CRC) on a packet data unit (PDU) that includes a header and a payload, in which the header includes bits indicating repetition coding for the payload;
- encoding the PDU to produce an encoded PDU signal;
- applying repetition coding to the payload based on the bits in the header indicating the repetition coding for the payload, wherein applying the repetition coding to the payload includes applying bit-level repetition to the payload;
- scrambling the encoded PDU signal to produce a scrambled PDU signal;
- interleaving the scrambled PDU signal to produce an interleaved signal;
- applying subcarrier modulation to the interleaved signal to produce a modulated signal;
- applying an inverse Fourier transform to the modulated signal;
- and
- transmitting a signal based on a result of applying the inverse Fourier transform to the modulated signal.
6 more elements
A device comprising:
- a processor:
- a transmitter coupled to the processor;
- and
- a non-transitory memory coupled to the processor and storing instructions that, when executed, cause the processor to:
- receive a packet data unit (PDU) including a header and a payload;
- apply convolutional encoding to the PDU;
- insert bits in the header to indicate repetition of the payload, and apply repetition to the header and the payload, wherein the repetition includes bit-level repetition;
- scramble the PDU;
- interleave the scrambled PDU;
- apply subcarrier modulation to the interleaved PDU;
- apply an inverse Fourier transform to the modulated PDU;
- and
- cause the transmitter to transmit the modulated PDU.
10 more elements
Dependencies are inferred from the claim text.