Data download system and method
AssigneeFisher & Paykel Appliances Limited
InventorsDavid Charles Rhodes, Christopher Kimberley Laird
Life of this patent
Estimating the term…
Abstract
An appliance having a diagnostic capability includes a tone generator, a controller, a data collection function, memory for storing the collected data, and a transmitter. The transmiter transmits a stream of data derived from the stored data using a carrier signal. The carrier signal is switched on and off according to bits in a stream of data derived from the stored data. The transmission also includes interleaving each bit for transmission with an off period of the carrier. Each off period of the carrier has a duration of at least 100 milliseconds.
Claims24
An appliance having a diagnostic capability, said appliance comprising:
- a tone generator,
- a controller,
- a data collection function and memory for storing collected data, and
- a transmitter for transmitting a stream of data derived from said stored data, using a carrier having a transmission frequency, wherein said transmission includes:
- switching the carrier on and off according to bits in the stream of data derived from said stored data, and
- interleaving each bit for transmission with an off period of the carrier.
A computer for use in conjunction with an appliance having a diagnostic capability, said computer executing the steps of:
- executing a program to receive a signal, generating a digital representation of said signal, processing said digital representation to find the centre frequency of said signal, processing said digital representation with a filter at said centre frequency, generating a temporal bit map according to said centre frequency based on an expected sequence of data-bits interleaved with off periods, and aligning said temporal bit map with said filtered digital representation to extract the data bits.
Dependencies are inferred from the claim text.