Patent application number | Description | Published |
20140023155 | DEVICE, SYSTEM AND METHOD OF COMMUNICATING A WIRELESS COMMUNICATION ORTHOGONAL-FREQUENCY-DIVISION-MULTIPLEXING SIGNAL - Some demonstrative embodiments include devices, systems and/or methods of communicating a wireless orthogonal-frequency-division-multiplexing (OFDM) signal. For example, a wireless communication device may communicate a wireless communication OFDM signal including a plurality of data subcarriers carrying data, at least one pilot subcarrier carrying a reference, predefined, value, and a plurality of zero subcarriers, carrying a zero value, surrounding the pilot subcarrier and separating between the pilot subcarrier and the data subcarriers. | 01-23-2014 |
20140126390 | APPARATUS, SYSTEM AND METHOD OF DIRECT CURRENT (DC) ESTIMATION OF A WIRELESS COMMUNICATION PACKET - Some demonstrative embodiments include devices, systems and/or methods of Direct Current (DC) estimation. For example, an apparatus may include an estimator to estimate a DC component of a received wireless communication packet based on a first value, a second value and an estimated frequency offset, wherein the first value is based on a first plurality of samples including at least a plurality of samples of a first sequence of a preamble of the wireless communication packet, the second value is based on a second plurality of samples including at least a plurality of samples of a second sequence of the preamble, immediately successive to the first sequence, and the estimated frequency offset corresponds to a frequency offset between the first and second pluralities of samples. | 05-08-2014 |
20140140379 | APPARATUS, SYSTEM AND METHOD OF IN-PHASE/QUADRATURE (I/Q) IMBALANCE COMPENSATION - Some demonstrative embodiments include apparatuses, systems and/or methods of In-phase/Quadrature (I/Q) imbalance compensation. For example, an apparatus may include an I/Q imbalance calibrator to determine, based on first and second phasors, a plurality of calibration parameters for calibrating I/Q imbalance of both a Radio Frequency (RF) Receive (Rx) path of a transceiver and a RF Transmit (Tx) path of the transceiver, the first phasor including a phasor of an image component of a first signal transmitted via the Tx path, shifted by a first phase shift and received via the Rx path, and the second phasor including a phasor of an image component of a second signal transmitted via the Tx path, shifted by a second phase shift, different from the first phase shift, and received via the Rx path. | 05-22-2014 |
20140152501 | APPARATUS, SYSTEM AND METHOD OF STEERING AN ANTENNA ARRAY - Some demonstrative embodiments include apparatuses, systems and/or methods of steering an antenna array. For example, a steering controller may control steering of an antenna array, the steering controller may be configured to select a first plurality of timing taps out of a second plurality of timing taps of a channel estimation, to determine a plurality of steering vectors corresponding the first plurality of timing taps, to determine a particular steering vector based on the plurality of steering vectors, and to control steering of the antenna array according to the particular steering vector. | 06-05-2014 |
20140270015 | INTER-CARRIER INTERFERENCE PHASE NOISE COMPENSATION BASED ON PHASE NOISE SPECTRUM APPROXIMATION - An approach is provided to compensate for inter-carrier interference caused by phase noise in a transmitted or received signal. The approach involves causing an estimation of one or more phase noise spectrum taps that cause inter-carrier interference in a received signal. The approach also involves causing an approximation of an instantaneous phase noise spectrum by a low order finite impulse response filter based on the estimated one or more phase noise spectrum taps. The approach additionally involves determining a de-convolution filter having two or more filter coefficients for one or more orthogonal frequency-division multiplexing symbols associated with the received signal. The approach further involves causing the de-convolution filter to be matched to the approximated instantaneous phase noise spectrum. The approach also involves causing the inter-carrier interference caused by phase noise to be compensated for based on a de-convolution procedure that applies the de-convolution filter to the one or more orthogonal frequency-division multiplexing symbols. | 09-18-2014 |
20150155961 | METHOD AND APPARATUS FOR INTER-CARRIER INTERFERENCE MITIGATION IN PHASE NOISE LIMITED WIRELSS COMMUNICTION SYSTEMS - In a wireless, OFDM system, phase noise may be mitigated through the use of an interleaver that is designed to distribute coded block bits across subcarriers of multiple OFDM symbols. Doing so decreases the non-stationary properties of the noise. Such an interleaver may be a rectangular interleaver that maps each block to a different subcarrier to create frequency diversity and to a different OFDM symbol, to create time diversity. One exemplary method of interleaving the symbols is to place a first symbol at row X and column Y of the interleaver. The next symbol is placed in row X+1 and column Y+1. The result of such an interleaving process is a great reduction in the block error rate. | 06-04-2015 |
20150156036 | DEVICE AND METHOD FOR CHANNEL ESTIMATION AND SIGNAL DEMODULATION - A device includes an input configured to receive a signal, wherein the signal includes at least one data block and a plurality of signal parts known to the device, a first signal part at the beginning of the data block and a second signal part at the end of the data block. The device further includes an equalizer and a pre-equalizer coupled between the input and the equalizer, wherein the pre-equalizer is configured to estimate a phase shift between the plurality of signal parts. | 06-04-2015 |
20150280862 | METHODS AND ARRANGEMENTS FOR DIRECT CURRENT ESTIMATION OF A WIRELESS COMMUNICATION PACKET - Logic for direct current (DC) estimation of a wireless communication packet. Logic may determine a first DC estimation based upon a first set of sequences in a preamble of the wireless communication packet. Logic may determine a second DC estimation based upon a second set of sequences in the preamble. Logic may select one of the DC estimations based upon a frequency-offset estimation. Logic may remove one of the DC estimations from the packet. Logic to null DC bins that result from a Fourier transform of the packet to mitigate transmitter DC bias. And logic to determine a correction for the packet based upon a difference between a predetermined guard interval value and a received guard interval value and to apply the correction to the packet. | 10-01-2015 |