DSSS inverted spreading for smart utility networks

摘要

A method of operating a transmitter (FIGS. 3A and 5A) is disclosed. The method includes receiving a sequence of data bits (DATA), wherein each data bit has a respective sequence number. A first data bit of the sequence is spread (508) with a first spreading code (504) determined by the sequence number (502) of the first data bit. A second data bit of the sequence is spread (508) with an inverse of the first spreading code (506) determined by the sequence number (502) of the second data bit. The first and second data bits are modulated (510) and transmitted (516) to a remote receiver.

主权项

1. A transmitter, comprising:
a buffer configured to receive a sequence of data bits, each data bit having a respective sequence number; a memory circuit storing a first spreading code and a second spreading code inversing the first spreading code; and an XOR circuit coupled with the buffer, the XOR circuit configured to: spread a first data bit of the sequence into spread first data bits using the first spreading code determined by the sequence number of the first data bit; and spread a second data bit of the sequence into spread second data bits using the second spreading code determined by the sequence number of the second data bit.