Back to results
US 12,261,654 B2Granted
Robust mode for power line communications
AssigneeTexas Instruments Incorporated
InventorsIl Han Kim, Tarkesh Pande, Anuj Batra
Life of this patent
Estimating the term…
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.
Claims22
A method comprising:
- when a header of a packet data unit (PDU) indicates use of a robust mode:
- encoding a payload of the PDU to produce an encoded payload;
- performing scrambling based on the encoded payload to produce a scrambled payload;
- performing interleaving based on the scrambled payload to produce an interleaved signal;
- applying subcarrier modulation based on the interleaved signal to produce a modulated signal;
- applying an inverse Fourier transform to the modulated signal;
- and
- transmitting an output signal based on a result of applying the inverse Fourier transform to the modulated signal, wherein, in the robust mode, the payload is encoded using forward error correction (FEC) and differential binary phase shift keying (DBPSK);
- and
- when the header of the PDU indicates use of a normal mode, the payload is encoded without using FEC and without using DBPSK.
7 more elements
A device comprising:
- a transmitter;
- and
- a processor configured to:
- when a header of a packet data unit (PDU) indicates use of a robust mode:
- encode a payload of the PDU to produce an encoded payload;
- perform scrambling based on the encoded payload to produce a scrambled payload;
- perform interleaving based on the scrambled payload to produce an interleaved signal;
- apply subcarrier modulation based on the interleaved signal to produce a modulated signal;
- apply an inverse Fourier transform to the modulated signal;
- and
- transmit an output signal based on a result of applying the inverse Fourier transform to the modulated signal using the transmitter, wherein, in the robust mode, the payload is encoded using forward error correction (FEC) and differential binary phase shift keying (DBPSK);
- and
- when the header of the PDU indicates use of a normal mode, the payload is encoded without using FEC and without using DBPSK.
10 more elements
Dependencies are inferred from the claim text.