Abstract: What is disclosed is a method for wireless communication comprising receiving a wireless communication via a receiver of the mobile communication device, deriving a demodulation reference signal from a first plurality of symbols of the wireless communication; creating a channel estimation matrix using the demodulation reference signal; inverting the channel estimation matrix to obtain a channel pseudo-inverse matrix; deriving a tracking reference signal from a second plurality of symbols of the wireless communication; calculating a phase shift for one or more additional symbols based on the tracking reference signal; determining a corrected channel pseudo-inverse matrix for the one or more additional symbols by adjusting the channel pseudo-inverse matrix according to the calculated phase shift; and controlling the receiver to accomplish data detection using the corrected channel pseudo-inverse matrix on one or more orthogonal frequency division multiplexing subcarriers.

Abstract: A wireless communication device may include a reference signal detector configured to detect a first synchronization block in a received signal and to determine a position of the synchronization block within a pattern of synchronization blocks, a controller configured to identify, based on the position, one or more additional synchronization blocks including payloads that are related to a payload of the first synchronization block, a combiner configured to combine the payload of the first synchronization block with the payloads of the one or more additional synchronization blocks to obtain a combined payload, and a decoder configured to decode the combined payload to obtain payload data.

Abstract: A wireless communication device may include a reference signal detector configured to detect a first synchronization block in a received signal and to determine a position of the synchronization block within a pattern of synchronization blocks, a controller configured to identify, based on the position, one or more additional synchronization blocks including payloads that are related to a payload of the first synchronization block, a combiner configured to combine the payload of the first synchronization block with the payloads of the one or more additional synchronization blocks to obtain a combined payload, and a decoder configured to decode the combined payload to obtain payload data.

Abstract: What is disclosed is a method for wireless communication comprising receiving a wireless communication via a receiver of the mobile communication device, deriving a demodulation reference signal from a first plurality of symbols of the wireless communication; creating a channel estimation matrix using the demodulation reference signal; inverting the channel estimation matrix to obtain a channel pseudo-inverse matrix; deriving a tracking reference signal from a second plurality of symbols of the wireless communication; calculating a phase shift for one or more additional symbols based on the tracking reference signal; determining a corrected channel pseudo-inverse matrix for the one or more additional symbols by adjusting the channel pseudo-inverse matrix according to the calculated phase shift; and controlling the receiver to accomplish data detection using the corrected channel pseudo-inverse matrix on one or more orthogonal frequency division multiplexing subcarriers.

Abstract: What is disclosed is a method for wireless communication comprising receiving a wireless communication via a receiver of the mobile communication device, deriving a demodulation reference signal from a first plurality of symbols of the wireless communication; creating a channel estimation matrix using the demodulation reference signal; inverting the channel estimation matrix to obtain a channel pseudo-inverse matrix; deriving a tracking reference signal from a second plurality of symbols of the wireless communication; calculating a phase shift for one or more additional symbols based on the tracking reference signal; determining a corrected channel pseudo-inverse matrix for the one or more additional symbols by adjusting the channel pseudo-inverse matrix according to the calculated phase shift; and controlling the receiver to accomplish data detection using the corrected channel pseudo-inverse matrix on one or more orthogonal frequency division multiplexing subcarriers.

Abstract: What is disclosed is a method for wireless communication comprising receiving a wireless communication via a receiver of the mobile communication device, deriving a demodulation reference signal from a first plurality of symbols of the wireless communication; creating a channel estimation matrix using the demodulation reference signal; inverting the channel estimation matrix to obtain a channel pseudo-inverse matrix; deriving a tracking reference signal from a second plurality of symbols of the wireless communication; calculating a phase shift for one or more additional symbols based on the tracking reference signal; determining a corrected channel pseudo-inverse matrix for the one or more additional symbols by adjusting the channel pseudo-inverse matrix according to the calculated phase shift; and controlling the receiver to accomplish data detection using the corrected channel pseudo-inverse matrix on one or more orthogonal frequency division multiplexing subcarriers.

Abstract: Frame synchronization techniques are described. In an implementation, a method implemented by a device includes using an objective function to form a list of values for a plurality of time trials, the time trials taken from a scan of a wireless signal having a plurality of channels. A single one of the values is selected for each of the plurality of channels to detect a preamble of a frame in the wireless signal. If the preamble is not detected as a result of the selecting, at least one additional value is chosen from the list for a respective channel to detect the preamble of the frame in the wireless signal.

Abstract: Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, and a transmitter configured to transmit, according to a first protocol, first wireless signals in the one of the plurality of the frequency regions selected by the controller, wherein each frequency region is characterized by a respective type of unwanted interference generated responsive to the transmitter transmitting the first wireless signals in the respective frequency region; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter.

Abstract: Devices, methods, and other embodiments associated with phase based preamble detection are described. In one embodiment, an apparatus includes a wireless transceiver, an evaluation logic, and a configuration logic. The wireless transceiver receives a wireless signal from a wireless device. The wireless signal includes a preamble sequence. The evaluation logic evaluates the preamble sequence by comparing phases of the preamble sequence to phases of predefined preamble sequences to identify a matching preamble sequence. The comparison is done without using amplitude information. The configuration logic configures the wireless transceiver to synchronize wireless communications with the wireless device based, at least in part, on the matching preamble sequence.

Abstract: Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, and a transmitter configured to transmit, according to a first protocol, first wireless signals in the one of the plurality of the frequency regions selected by the controller, wherein each frequency region is characterized by a respective type of unwanted interference generated responsive to the transmitter transmitting the first wireless signals in the respective frequency region; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter.

Abstract: Frame synchronization techniques are described. In an implementation, a method implemented by a device includes using an objective function to form a list of values for a plurality of time trials, the time trials taken from a scan of a wireless signal having a plurality of channels. A single one of the values is selected for each of the plurality of channels to detect a preamble of a frame in the wireless signal. If the preamble is not detected as a result of the selecting, at least one additional value is chosen from the list for a respective channel to detect the preamble of the frame in the wireless signal.

Abstract: Disclosed is a density evolution algorithm based on a refined definition of node and edge densities for different parts of the code. In particular, density functions ƒV(1)(i) and ƒV(2)(i) of the output edges of the variable nodes with degree i within different codeword regions w1 and we, respectively, are defined and then calculated. Further, density functions ƒC(1)(j) and ƒC(2)(j) of the output edges for check nodes with degree j within codeword regions w1 and we, respectively, are defined and then calculated. Mixture density functions of output check edges connecting variable nodes in the first codeword region and the second codeword region are then calculated to determine an LDPC code design.

Abstract: Methods and apparatus for using automatic-repeat-request (ARQ) protocols in multiple parallel channel systems are provided. In parallel channel systems (e.g., MIMO and/or OFDM systems), various ARQ protocols are employed to increase system throughput. Methods of analysis of the throughput of these protocols are also provided to determine an appropriate protocol. These methods include determining the parameters of a packet-layer model from the physical-layer model parameters and the transceiver parameters using Markov modeling techniques. That is, the rate of a state of the ARQ system is determined and the throughput of the ARQ system is then determined based on the rate using a physical-layer Markov model.

Abstract: Disclosed is a density evolution algorithm based on a refined definition of node and edge densities for different parts of the code. In particular, density functions ƒV(1)(i) and ƒV(2)(i) of the output edges of the variable nodes with degree i within different codeword regions w1 and we, respectively, are defined and then calculated. Further, density functions ƒC(1)(j) and ƒC(2)(j) of the output edges for check nodes with degree j within codeword regions w1 and we, respectively, are defined and then calculated. Mixture density functions of output check edges connecting variable nodes in the first codeword region and the second codeword region are then calculated to determine an LDPC code design.