6 results about "Transmission diversity" patented technology

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for a first physical channel associated with analog channel state information (CSI), wherein the configuration for the first physical channel includes a configuration for applying a rate matching technique or a transmission diversity technique to the first physical channel. The UE may receive a configuration for a second physical channel associated with digital CSI. The UE may transmit, via the first physical channel, an analog component of a CSI report in accordance with the configuration for the first physical channel associated with the analog CSI. The UE may transmit, via the second physical channel, a digital component of the CSI report in accordance with the configuration for the second physical channel associated with the digital CSI. Numerous other aspects are described.

Example embodiments relate to techniques for implementing radar waveform diversity. A technique may involve a radar unit transmitting radar signals into an environment of a vehicle based on a code sequence that indicates a ramp direction and a phase shift for each pulse in a pulse used by the radar unit and receiving radar reflections from the environment. In some instances, the radar unit may leverage antennas in a multiple input multiple output (MIMO) arrangement to further add diversity to transmissions according to spatial code in the code sequence. The technique can further involve using a demodulator to map the environment based on the radar reflections and controlling the vehicle based on the mapping. In some instances, the code sequence is received from a system that is wirelessly providing orthogonal code sequences to multiple emitters.

A method, apparatus and computer program product are provided for conveying information regarding the antenna configuration and / or the transmission diversity scheme to a recipient, such as a mobile device. In particular, information regarding the antenna configuration and / or the transmission diversity scheme can be conveyed by appropriately mapping a physical broadcast channel within a sub-frame so as to include reference signals indicative of different antenna configurations or transmission diversity schemes. Alternatively, masking, such as cyclic redundancy check masking, can be used to provide information regarding the antenna configuration and / or the transmission diversity scheme.

The application discloses a time synchronization method, device and equipment of a dual-antenna transmission diversity, and relates to the field of dual-antenna transmission diversity. The method comprises the following steps: at a sending end, performing frequency domain CDD processing on one of two space-time streams, and adding a synchronization header to the two space-time streams, wherein the synchronization header comprises a long preamble formed by a 512-point M sequence, and the number of delay samples of the long preamble CDD processing is 256; at a receiving end, using a sliding search window with a value of 768 to obtain the time of three correlation peaks generated by the long preamble as a time synchronization point for time synchronization. The application can ensure that the second expected correct peak value is the highest in any complex multipath scenario, thereby avoiding synchronization errors in the complex multipath scenario and avoiding demodulation failure.

The invention discloses a DVB-S2 high-order modulation satellite channel transmission simulation method and a DVB-S2 high-order modulation satellite channel transmission simulation system based on GNU Radio. According to the method, on the basis of a GNU Radio platform, a high-order modulation transmission link conforming to the DVB-S2 standard is constructed, modulation and demodulation of 16 APSK and 32 APSK are achieved, and the spectrum efficiency of a system is remarkably improved; through deep integration of Loo and Corazza satellite channel models, multipath fading and shadow effects of rural and urban environments are accurately simulated, and simulation authenticity is enhanced. According to the system, the transmission diversity technology is adopted, and the transmission robustness under a fading channel is improved through a double-transmission-branch architecture. End-to-end transmission verification of a high-definition video stream is realized by means of a HackRF software radio hardware platform, a TR101290 standard analysis module is integrated to carry out packet error rate analysis, and the transmission performance of the system is objectively quantified. According to the system, convenient parameter configuration and real-time monitoring are achieved through a QT graphical interface, and the problems that in traditional satellite communication simulation, channel models are not matched, the system flexibility is poor, and transmission reliability and stability are low under deep fading are effectively solved.