Abstract: A transmitter at a first location transmits the message at a symbol rate of the reference clock using a first carrier, whose phase is locked to a phase of the reference clock and whose frequency is a first integer times a frequency of the reference clock. It also transmits the message at the symbol rate of the reference clock using a second carrier, whose phase is locked to the phase of the reference clock and whose frequency is a second integer times the frequency of the reference clock. The second integer is unequal to the first integer. A receiver at a second location receives the message at the first carrier and at the second carrier, and accurately determines a time of a first phase difference between the first carrier and the second carrier. It determines a time of receiving the message from the time of the first phase difference.

Abstract: A wireless transmitter includes RF transmitters, an RF receiver, and a processor. It receives an ACK signal that specifies an RF mode and diversity information. The receiver receives a framed data packet that includes first PHY parameters. It determines second PHY parameters based on the diversity information, and replaces the first PHY parameters with the second PHY parameters. It transmits data via multiple diversity channels, according to the diversity information. A wireless receiver includes multiple RF receivers and an RF transmitter. It receives data in accordance with first diversity settings in a first RF mode. It determines a current reception condition and predicts a future reception condition from a dominant aggressor. It uses the future reception condition to determine a second RF mode with second diversity settings and includes the second diversity settings in an acknowledge signal.