Data encoding based on notch filtering to prevent desense

摘要

In one embodiment, a data encoder for a component (such as an integrated circuit) may encode data to be transmitted from the component to another component in a system. The encoder may avoid one or more data patterns that, if transmitted by the component, may cause noise to occur at one or more specified frequencies (or frequency bands). The specified frequencies may be frequencies that are in use for wireless communication by the device. By avoiding noise at the specified frequencies, the desense that might otherwise occur may be reduced or eliminated. Quality and speed of the wireless communication may be increased.

主权项

1. An integrated circuit comprising:
a data source configured to generate data to be communicated external to the integrated circuit; a data encode circuit coupled to the data source, wherein the data encode circuit is configured to encode the data to generate encoded transmission data, wherein the data encode circuit is configured to avoid one or more first data patterns in the encoded transmission data, wherein the one or more first data patterns correspond to one or more frequencies in the power spectral density corresponding to the encoded transmission data, wherein the one or more frequencies are used for wireless communication in a device that includes the integrated circuit, and wherein the data encode circuit is configured to replace each of the first data patterns with a respective second data pattern to prevent transmission of the first data patterns; and a driver circuit coupled to receive the encoded transmission data with the first data patterns replaced, wherein the driver circuit is configured to drive the encoded transmission data external to the integrated circuit, and wherein the data encode circuit is configured to include a first indication in the encoded transmission data to identify the corresponding second data pattern that replaces the first data pattern, and wherein the data encode circuit is further configured to compare initial encoded data to the one or more second data patterns, and wherein the data encode circuit is configured to include a second indication in the encoded transmission data responsive to detecting one of the second data patterns in the initial encoded data, the second indication in a different state than the first indication provided when the corresponding second data pattern is included in the encoded transmission data to replace the first data pattern.