An apparatus, method and computer program is described including initialising trainable parameters of a receiver of a transmission system, wherein the receiver includes a demodulation module for demodulating received symbols, a quantization module for generating quantized versions of the demodulated symbols and a decoder for generating a decoded output derived from the quantized versions of the demodulated symbols, wherein the demodulation module has at least some trainable weights and the quantization module has at least some trainable weights; receiving a first training sequence of messages at the receiver; obtaining or generating a loss function; and updating at least some of the trainable parameters of receiver based on the loss function, wherein updating at least some of the trainable parameters of receiver includes updating at least some of the trainable weights of the demodulation module and updating at least some of the trainable weights of the quantization module.

An apparatus, method and computer program performs initializing parameters of a transmission system. The transmission system comprises a transmitter, a first channel, a relay, a second channel and a receiver. The transmitter includes a transmitter algorithm having trainable weights, the relay includes a relay algorithm having trainable weights and the receiver includes a receiver algorithm having trainable weights. A first training sequence of messages is received, and the first training sequence of messages is sent from the transmitter to the relay using the first channel and is sent from the relay to the receiver using the second channel. A loss function is obtained or generated, and trainable parameters of the transmission system are updated based on the loss function. The trainable parameters include some of the trainable weights of the transmitter, some of the trainable weights of the relay, and some of the trainable weights of the receiver.

A software-defined radio system may include a radio frequency front end connected to a high performance computing processor comprised of a central processing unit (CPU), a graphics processing unit (GPU), and a shared memory between the CPU and GPU. The software-defined radio system may incorporate a signal processing unit between the radio frequency front end and the high performance computing processor. Additionally, the software-defined radio system may be configured to create a ring buffer in a shared memory between the CPU and GPU and directly store digital signal data in the ring buffer. The software-defined radio system may be used to implement and train machine learning algorithms and transmit digital signals.

An apparatus for communication in a wireless communication network comprises a coder that encodes a set of data symbols to produce a set of coded symbols; a modulator that modulates the coded symbols onto a set of subcarrier frequencies to generate a time-domain signal comprising a sum of a set of modulated pulse waveforms; and a transmitter configured for transmitting the time-domain signal in the wireless communication network. The coder employs a matrix of spreading codes, wherein each column of the matrix multiplies a different one of the data symbols, which causes the modulator to produce a corresponding one of the set of modulated pulse waveforms. Each column of the matrix of spreading codes comprises a set of linearly increasing phases, which provides a time offset to the corresponding modulated pulse waveforms.

Embodiments of this disclosure provide a system and method for wireless communication and wireless sensing in a low-cost common transceiver structure. In particular, the common transceiver structure may have a common digital-to-analog converter (DAC) configured to convert a digital wireless communication signal and a digital wireless sensing signal into an analog wireless communication signal and an analog wireless sensing signal, respectively. The common transceiver may also have a common transmitting antenna configured to transmit the analog wireless communication signal and the analog wireless sensing signal.

Provided is a software wireless device capable of continuing communication without being affected by quality deterioration of a wireless line and without discarding of traffic data. The data to be transmitted is duplicated and wirelessly transmitted over a plurality of communication lines having different frequency bands (step 104). The received data received by the communication line having the best line quality is validated. Another frequency band that is different from the frequency band used in the plurality of communication lines and can provide line quality exceeding a determination criteria is searched (step 106). When the quality of the communication line communicating the same data deteriorates (step 108), the communication on that line is switched to the wireless communication on the additional communication line using the other frequency band (step 110).

In one example, a remote tuner module includes: a first tuner to receive, process and demodulate a first radio frequency (RF) signal to output an analog audio signal, and to receive and process a second RF signal to output a first downconverted modulated signal; a second tuner to receive and process the second RF signal to output a second downconverted modulated signal; a demodulator circuit coupled to the first and second tuners to demodulate and link the first and second modulated signals, to output a linked demodulated signal. The remote tuner module may further include a gateway circuit coupled to at least the demodulator circuit to output the analog audio signal and the linked demodulated signal.

A base station type replacement method, a software defined radio (SDR) network management system, a base station type replacement apparatus and a non-transitory computer-readable storage medium are disclosed. The method may include: creating a blank target base station rack diagram in a view area in a source base station rack diagram according to a new base station creation operation of a user through an SDR network management system (201); and moving a graphical managed object (MO) in the source base station rack diagram to the target base station rack diagram according to a graphical move operation of the user, storing service location keyword information of the MO in the source base station rack diagram and the target base station rack diagram, and configuring data of a target base station based on the target base station rack diagram during the graphical move operation to complete base station type replacement (202).

Disclosed in some examples are systems, methods, devices, and machine-readable mediums for improved communications between a software-defined radio front-end device and a network-based computing device. Rather than packetize samples together, same bit positions from multiple ADC samples may be packetized together. If a Quality of Service (QoS) metric of the network connection between the RF front-end device and the network-based processing computing drops below a threshold, the RF front-end device may prioritize sending packets with the more significant bits over packets with less significant bits. In other examples, the RF front-end device may prioritize samples corresponding to certain data types over other data types.

A platform is provided which removes the need for the pilot to select between high angle and low angle antenna elements. By the automatic selection, the platform may improve BLOS connectivity during various phases of flight, such as during banking operations. The platform includes a SATCOM antenna including first and second elements. The platform also includes one or more SDRs which provide receive and transmit functions for the BLOS waveform. The platform may also include either a UHF diversity combiner or an LNA diplexer assembly. Thus, two methods are described for reducing out-of-service events for CDMA and legacy Narrowband UHF SATCOM.