Abstract: A spatial signal processing system and method are provided to optimize the received signal-to-noise ratio (SNR) at a first radio communication device based on the transmit filter at another radio communication device. Using an estimate of the channel derived from a signal received at one device from another device, an iterative process is provided to determine complex weights for one or more tapped delay-line transmit filters at each of two communication devices that optimize the received SNR.

Abstract: A system and method that minimizes power consumption in wideband radios by dynamically adjusting the sampling rates of an analog-to-digital converter to the minimum sampling rate required to support the operation in a wideband mode and operation a narrowband mode. The sampling rate is controlled according to an operating mode whereby the sampling rate for a wideband operating mode is greater than the sampling rate for a narrowband operating mode. The wideband operating mode is a mode in which energy for an entire frequency band is received and sampled by the analog-to-digital converter and the narrowband operating mode is a mode in which only a portion of the entire frequency band is received and sampled by the analog-to-digital converter.

Abstract: Interference mitigation or collision avoidance systems and procedures to allow different wireless local area network (WLAN) communication protocols to co-exist in the same frequency band, such as an unlicensed frequency band used for short-range wireless communications. The procedures ensure substantial throughput of information carried by signals of each WLAN protocol while preventing collisions between signals of different protocols.