Detecting wireless noise within time period in which no data is purposefully wirelessly communicated

摘要

Wireless noise is detected within a time period specifically held after a data packet is wirelessly communicated, where no data is purposefully wirelessly communicated during this time period. The time period may be an inter-frame space (IFS) period within which no data is to be wirelessly communicated, and that is a period waited for prior to accessing a wireless medium over which data is wirelessly communicated. One or more actions are performed to counteract the noise. The frequency at which a liquid crystal display is being driven may be decreased so that harmonics caused thereby that caused the noise are no longer within the wireless communication frequency range. An opposite-in-phase version of the noise may also or alternatively be combined with a signal when data is subsequently wirelessly received. The signal includes a data component and a noise component, the opposite-in-phase version of the noise canceling out the noise component.

主权项

1. A method comprising:
driving a liquid crystal display (LCD) at a first driving frequency; transmitting data at a data frequency within a first data frame of a plurality of data frames specified by a communication protocol; stopping transmission of the data when the first data frame has finished even though additional data is to be transmitted; before a second data frame of the plurality of data frames has started, detecting whether wireless noise is present at the data frequency, within an inter-data frame period specified by the communication protocol; in response to detecting that the wireless noise is present at the data frequency, driving the LCD at a second driving frequency lower than the first driving frequency; transmitting the additional data at the data frequency within the second data frame; stopping transmission of the data when the second data frame has finished; before a third data frame of the plurality of data frames has started detecting whether the wireless noise is still present at the data frequency, within another inter-data frame period specified by the communication protocol; in response to detecting that the wireless noise is no longer present at the data frequency, continuing to drive the LCD at the second driving frequency; and in response to detecting that the wireless noise is still present at the data frequency, again driving the LCD at the first driving frequency.