Abstract: A wireless communications device may be configured to perform a first demodulation based upon a first sampling rate of a received signal to generate a first demodulated signal and determine therefrom whether a first error value is not greater than a first threshold, and, if so then decode the first demodulated signal. If the first error value is greater than the first threshold, a second demodulation is performed based upon a second sampling rate of the received signal greater than or equal to the first sampling rate to generate a second demodulated signal and determine therefrom whether a second error value is not greater than a second threshold, and, if so, then decode the second demodulated signal. If the second error value is greater than the second threshold, the second demodulation is performed at least one additional time with at least one change thereto.

Abstract: A wireless communications device includes a receiver, and a demodulator coupled downstream from the receiver and configured to use a continuous phase modulation (CPM) waveform to non-coherently demodulate a received signal. The demodulator is configured to generate waveform banks, each waveform bank having a respective different frequency offset associated therewith, determine a correlation output metric for each waveform bank, select a waveform bank for demodulating the received signal based upon the correlation output metrics of the waveform banks, and demodulate the received signal using the selected waveform bank and the associated frequency offset.

Abstract: A mobile wireless communications device may include an antenna, a transceiver coupled to the antenna, and a controller coupled to the transceiver. The controller may be configured to determine a received signal characteristic, and to configure parameters of a waveform for adjacent forward transmission blocks to be transmitted as sequential forward transmission blocks and based upon the received signal characteristic. Each forward transmission block may have a preamble portion and an associated body portion. The controller may be further configured to set the preamble portion of each forward transmission block to communicate the parameters of the configured waveform.

Abstract: A mobile wireless communications device may include an antenna, and a transceiver coupled to the antenna. The transceiver may use a modulation having memory for a message in a frame structure including a data portion and a termination portion based upon the data portion. The termination portion may drive the modulation to a desired known ending state. The modulation may include a spread spectrum modulation or a non-spread modulation.

Abstract: A communications system includes a first communications device cooperating with a second communications device. The first communications device multiplexes a digital speech message and a corresponding text message into a multiplexed signal, and wirelessly transmits the multiplexed signal. The second communications device wirelessly receives the multiplexed signal, de-multiplexes the multiplexed signal digital into the speech message and the corresponding text message, decodes the speech message for an audio output transducer, and operates a text processor on the corresponding text message for display. The corresponding text message is displayed in synchronization with the speech message output by the audio output transducer. A memory is coupled to the text processor for storing the text message, and the text processor is configured to display the stored text message.

Abstract: A wireless communications device may include a transceiver, a memory configured to store a predetermined set of preamble synchronization portions, each preamble synchronization portion having a different length, and a controller cooperating with the transceiver and the memory. The controller may be configured to receive forward transmission blocks, each forward transmission block having a preamble synchronization portion and a body portion associated therewith. The preamble synchronization portion may include a desired preamble synchronization portion from among the predetermined set of preamble synchronization portions. The controller may be configured to determine and use, for each received forward transmission block, the corresponding preamble synchronization portion from among the predetermined set of preamble synchronization portions.

Abstract: An HF radio ALE communication system may include a first HF radio communications device including a first HF radio transceiver and a first controller coupled thereto, and a second HF radio communications device including a second HF radio transceiver and a second controller coupled thereto. The first controller may cooperate with the first HF radio transceiver and may be configured to use ALE to establish a narrowband communication link with the second HF radio communications device, and to communicate a wideband message probe to the second HF radio communications device. The second controller may cooperate with the second HF radio transceiver and may be configured to determine at least one channel characteristic based upon the wideband message probe. The first controller may cooperate with the first HF radio transceiver and may be configured to update the narrowband communication link based upon the at least one channel characteristic.

Abstract: A communication system includes a plurality of nodes forming a wireless mesh network. A plurality of wireless communication links connect the nodes together. Each node is formed as a communications device having a physical layer and a media access control (MAC) layer in accordance with the Open System Interconnect (OSI) model and operative for transmitting and receiving communications packets to and from other nodes via the wireless communication links in an Automatic Repeat Request (ARQ) mode. The physical layer monitors channel parameters of the wireless communications link when in an ARQ mode and, based on the channel parameters, communicates to the MAC layer over-the-air (OTA) parameters used for transmitting packets.

Abstract: A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a tap order selection circuit for selecting the number and order of adaptive filter taps based on one of at least measured output power from the adaptive filter and signal modulation. A demodulator and decoder receives the filtered output signal and demodulates and decodes the signal to obtain the communications data.

Abstract: A wireless communications device may include a wireless receiver for receiving a Gaussian phase shift keyed signal having a selected data symbol mapping, and a demodulator coupled to the wireless receiver for demodulating the Gaussian phase shift keyed signal using memory-less data symbol decisions based upon the selected data symbol mapping.

Abstract: A mobile ad-hoc network includes a plurality of N mobile nodes and wireless communication links connecting the mobile nodes, which each include a communications device for transmitting and routing data packets wirelessly to other mobile nodes via the wireless communication links in accordance with a time division multiple access (TDMA) data transmission protocol using a TDMA epoch that is divided into a beacon interval, digital voice interval and digital data interval. The mobile nodes monitor channel conditions using the beacon, digital voice and digital data intervals and provide a network conductivity performance as valid receptions occur within mobile nodes. A data rate is calculated and set for other N?1 mobile nodes using monitored channel conditions for the beacon, digital voice and digital data intervals.

Abstract: A communications system receives a modulated communication signal that carries encoded communications data. A signal input receives the communication signal. An adaptive filter circuit is connected to the signal input and comprises N number of parallel adaptive filters. Each adaptive filter has non-adaptive and adaptive taps with weighted coefficients that are different in number from the respective other parallel adaptive filters within the adaptive filter circuit. A selection output circuit is connected to each adaptive filter and selects for output the adaptive filter having the most suppression or least output power or other criterion which can indicate a best choice to use of the N parallel adaptive filters. A demodulator demodulates the signal and a decoder receives the filtered output signal from the demodulator and decodes the signal to obtain the communications data.

Abstract: An HF radio ALE communication system may include a first HF radio communications device including a first HF radio transceiver and a first controller coupled thereto, and a second HF radio communications device including a second HF radio transceiver and a second controller coupled thereto. The first controller may cooperate with the first HF radio transceiver and may be configured to use ALE to establish a narrowband communication link with the second HF radio communications device, and to communicate a wideband message probe to the second HF radio communications device. The second controller may cooperate with the second HF radio transceiver and may be configured to determine at least one channel characteristic based upon the wideband message probe. The first controller may cooperate with the first HF radio transceiver and may be configured to update the narrowband communication link based upon the at least one channel characteristic.

Abstract: A wireless communications device may be configured to perform a first demodulation based upon a first sampling rate of a received signal to generate a first demodulated signal and determine therefrom whether a first error value is not greater than a first threshold, and, if so then decode the first demodulated signal. If the first error value is greater than the first threshold, a second demodulation is performed based upon a second sampling rate of the received signal greater than or equal to the first sampling rate to generate a second demodulated signal and determine therefrom whether a second error value is not greater than a second threshold, and, if so, then decode the second demodulated signal. If the second error value is greater than the second threshold, the second demodulation is performed at least one additional time with at least one change thereto.

Abstract: A communications system receives a modulated signal that carries encoded communications data. An adaptive filter circuit has a plurality of adaptive filters each having a plurality of non-adaptive and adaptive filter taps with weighted coefficients. At a selected adaptive filter, an interference reduction circuit is responsive to one of at least a received state of a demodulator, the type of modulation used by communication system and the input and output power of adaptive filter for updating the adaptive gain of the adaptive filter, selecting the number and order of adaptive filter taps, separating the spacing of multipath introduced by adaptive filter, controlling input and output normalizing circuits to adaptive filter(s) and selecting if signal passed to demodulator is original received signal or signal output by adaptive filter. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.

Abstract: A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a input and output normalizing circuit that obtain sample values from a received signal input to or output from the adaptive filter to increase gain recovery based on type of modulation of encoded communication data, on state of demodulator (preamble search, preamble detected, data state) or other signal acquisition information. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.

Abstract: A radio device includes a transmitter having a modulator for generating M-PAM communications symbols containing communications data. A Fast Walsh Transform circuit orthogonally encodes and band-spreads a communications symbol using the Fast Walsh Transform. A frequency modulation circuit frequency modulates the communications symbols wherein a constant envelope orthogonal Walsh modulated communications signal is generated having a plurality of orthogonal waveforms each forming a separate Walsh communications channel.

Abstract: A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and an adaptive gain circuit for updating the adaptive gain of the adaptive filter responsive to a received state of a modem or the type of modulation used by communications system. A demodulator and decoder receive the filtered output signal from the adaptive filter and demodulate and decode the signal to obtain the communications data.

Abstract: A portable communications device communicates based upon constant envelope orthogonal frequency-division multiplexing (CE-OFDM). The portable communications device may include an antenna for receiving a CE-OFDM signal, and a receiver coupled to the antenna. The receiver may include a frequency domain equalizer (FDE) operating based upon a channel estimate of the received CE-OFDM signal, a non-linear function block coupled to and downstream from the FDE, and a demodulation correction block coupled to and downstream from the non-linear function block for correcting an output of the non-linear function block.

Abstract: A wireless communications device may include a transceiver, a memory configured to store a predetermined set of preamble synchronization portions, each preamble synchronization portion having a different length, and a controller cooperating with the transceiver and the memory. The controller may be configured to receive forward transmission blocks, each forward transmission block having a preamble synchronization portion and a body portion associated therewith. The preamble synchronization portion may include a desired preamble synchronization portion from among the predetermined set of preamble synchronization portions. The controller may be configured to determine and use, for each received forward transmission block, the corresponding preamble synchronization portion from among the predetermined set of preamble synchronization portions.