Patent application number | Description | Published |
20130201965 | WIRELESS NETWORKS UTILIZING MULTIPLE MODULATIONS - A method of communicating in a wireless network including a plurality of nodes having communications devices including a first node, wherein at least one node utilizes a first physical layer (PHY) modulation, and at least one other node utilizes a second PHY modulation different from the first PHY modulation. The first node receives a PHY frame transmitted by one of the plurality of nodes, and identifies a PHY modulation type selected from the first PHY modulation and the second PHY modulation used in the PHY frame or to be used in a subsequently to be received PHY frame or frame portion. The first node decodes the PHY frame or the subsequently to be received PHY frame or frame portion using the PHY modulation type identified in the identifying step. | 08-08-2013 |
20130202014 | DSSS Preamble Detection for Smart Utility Networks - Embodiments of the invention provide a method to detect DSSS preambles in smart utility networks. A DSSS signal is received by a receiver and a digital sequence of samples is formed. A difference value is calculated between pairs of samples in the digital sequence of samples to form a sequence of differential values. A known preamble differential value sequence is correlated with the sequence of differential values to form a sequence of correlation values. A location of the preamble is located in the digital sequence of samples corresponding to a peak in the sequence of correlation values that exceeds a threshold value. | 08-08-2013 |
20140016675 | INVERTED SPREADING DSSS FOR SMART UTILLITY NETWORKS - A method of operating a transmitter (FIGS. | 01-16-2014 |
20140307810 | Time-Domain Windowing Function - A smart utility network (SUN) device that includes an orthogonal frequency-division multiplexing (OFDM)-based transmitter. The OFDM-based transmitter including a signal processor to convert data from a frequency-domain to a time-domain using an inverse fast Fourier transform (IFFT) and configured to perform a time-domain windowing function based on a Hanning window on OFDM symbols. | 10-16-2014 |
20140307813 | Symbol-Wise Channel Tracking For SUN OFDM - A device for updating complex channel gain estimates for orthogonal frequency division multiplexed (OFDM) symbols that includes a receiver to receive a plurality of OFDM symbols, wherein each OFDM symbol includes a plurality of pilot tones at a subset of odd positions and a finite impulse response (FIR) filter. The FIR filter configured to filter a plurality of initial channel estimates of odd tones of an OFDM symbol using a first set of coefficients to generate an updated estimate of the channel estimates of the plurality of odd tones for that OFDM symbol, and filter the plurality of the initial channel estimates of the odd tones of the OFDM symbol using a second set of coefficients to generate estimates for a plurality of initial channel estimates of even tones for that OFDM symbol. | 10-16-2014 |
20140307841 | SNR Dependent Channel Tracking For SUN OFDM - An orthogonal frequency-division multiplexed (OFDM)-based receiver for channel tracking with signal-to-noise ratio dependent parameters that includes a memory; and a signal processor, coupled to the memory. The signal processor to estimate a signal-to-noise ratio (SNR) for a received packet of OFDM symbols and determine an SNR region in which the SNR estimate falls, wherein the signal processor implements a different set of finite impulse response (FIR) filter coefficients for each SNR region. | 10-16-2014 |
20140355506 | TURBO HSDPA SYSTEM - A method of power saving for a wireless transceiver (FIGS. | 12-04-2014 |
20150100856 | PACKET HEADER PROTECTION FOR UTILITY NETWORKS - A packet header protection system includes, for example, a header checksum (CS) that is arranged to provide error detection capability to FSK (frequency shift keyed) packet headers. Accordingly, receivers in the network can more quickly terminate processing of an errored packet upon detection of error(s) in the header. Quickly detecting packet header errors helps to avoid a sequence of compounding errors such as the repeated transmissions of a packet having an undetected erroneous header. Accordingly, the packet header protection system reduces false alarm rate in the network and increases network throughput. | 04-09-2015 |