A wireless communication system, apparatus, and methodology are described for enabling wireless communication station (STA) devices to generate a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU) having a size that is less than a spreading frequency block by using one or more predetermined pilot and/or data tone mapping plans to control how each pilot/data tone from the RU is distributed onto a disjoint set of pilot/data subcarriers forming a distributed RU included in the spreading frequency block, thereby accommodating transmission of wider bandwidth and multiple resource unit assignments in accordance with power spectrum density (PSD) limits provided for orthogonal frequency-division multiplexing (OFDM) modulated symbols supported by emerging 802.11 standards.

A wideband transmission circuit is provided. The wideband transmission circuit includes a transceiver circuit and a power amplifier circuit(s). The transceiver circuit generates a radio frequency (RF) signal(s) from a time-variant input vector and provides the RF signal(s) to the power amplifier circuit(s). The power amplifier circuit(s) amplifies the RF signal(s) based on a modulated voltage and provides the amplified RF signal(s) to a coupled RF front-end circuit (e.g., filter/multiplexer circuit). In embodiments disclosed herein, the transceiver circuit is configured to apply an equalization filter to the time-variant input vector to thereby compensate for a voltage distortion filter caused by a coupling of the power amplifier circuit(s) and the RF front-end circuit. As a result, it is possible to reduce undesired instantaneous excessive compression and/or spectrum regrowth resulting from the voltage distortion filter to thereby improve efficiency and linearity of the power amplifier circuit(s).

A wideband transmission circuit is provided. The wideband transmission circuit includes a transceiver circuit and a power amplifier circuit(s). The transceiver circuit generates a radio frequency (RF) signal(s) from a time-variant input vector and provides the RF signal(s) to the power amplifier circuit(s). The power amplifier circuit(s) amplifies the RF signal(s) based on a modulated voltage and provides the amplified RF signal(s) to a coupled RF front-end circuit (e.g., filter/multiplexer circuit). In embodiments disclosed herein, the transceiver circuit is configured to apply an equalization filter to the time-variant input vector to thereby compensate for a voltage distortion filter caused by a coupling of the power amplifier circuit(s) and the RF front-end circuit. As a result, it is possible to reduce undesired instantaneous excessive compression and/or spectrum regrowth resulting from the voltage distortion filter to thereby improve efficiency and linearity of the power amplifier circuit(s).

A device, a system, and a method for power spectrum density (PSD) limited transmissions are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to generate a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) that includes a base modulation frequency unit, where the base modulation frequency unit is duplicated to unpunctured subchannels of the PPDU with a phase rotation, and transmit the PPDU in accordance with a power spectrum density (PSD) limit.

A device, a system, and a method for power spectrum density (PSD) limited transmissions are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to generate a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) that includes a base modulation frequency unit, where the base modulation frequency unit is duplicated to unpunctured subchannels of the PPDU with a phase rotation, and transmit the PPDU in accordance with a power spectrum density (PSD) limit.

Techniques are provided for asset location using backscatter communication. A methodology according to an embodiment includes receiving a signal, generated by a tag associated with an asset in response to a broadcast signal. The broadcast signal comprising a base code sequence, and the received signal comprising the broadcast signal modulated by a tag code sequence and shifted in frequency by a frequency offset. The methodology further includes translating the received signal by the frequency offset to generate a translated received signal, demodulating the translated received signal to remove the tag code sequence modulation to generate a demodulated received signal, cross-correlating the base code sequence with the demodulated received signal to generate a correlation signal, and determining a range to the asset based on a time delay associated with a peak of the correlation signal. The tag may be located based on the range and an estimated direction to the tag.

Techniques are provided for asset location using backscatter communication. A methodology according to an embodiment includes receiving a signal, generated by a tag associated with an asset in response to a broadcast signal. The broadcast signal comprising a base code sequence, and the received signal comprising the broadcast signal modulated by a tag code sequence and shifted in frequency by a frequency offset. The methodology further includes translating the received signal by the frequency offset to generate a translated received signal, demodulating the translated received signal to remove the tag code sequence modulation to generate a demodulated received signal, cross-correlating the base code sequence with the demodulated received signal to generate a correlation signal, and determining a range to the asset based on a time delay associated with a peak of the correlation signal. The tag may be located based on the range and an estimated direction to the tag.

Described are power line communication (PLC) systems, devices and techniques which are reliable and suitable for use in control applications which can operate with relatively low data rates while complying with governing regulatory rules. Such systems, devices and techniques enable demand-side management of electrical loads in a building or facility or other environment.

Described are power line communication (PLC) systems, devices and techniques which are reliable and suitable for use in control applications which can operate with relatively low data rates while complying with governing regulatory rules. Such systems, devices and techniques enable demand-side management of electrical loads in a building or facility or other environment.

A method of operating a seamless physical access control system comprises transferring communication session information using an out-of-band (OOB) communication channel of a smart ultra-wide band (UWB) capable device; establishing a secure OOB communication channel between the smart UWB capable device and a reader device using the communication session information; determining that a UWB enabled application of the smart UWB capable device needs secure ranging; establishing a secure UWB communication channel between the smart UWB capable device and the reader device; and transferring ranging information from a secure component of the smart UWB capable device to the reader device via the secure UWB communication channel.