4 results about "Transceiver design" patented technology

The application discloses a kind of for speed fuzzy target robust detection under clutter background transceiver design method, comprising the following steps: S1, intra-pulse inter-pulse parameter agile waveform component analysis;S2, intra-pulse inter-pulse waveform dependent airborne radar echo modeling;S3, the modeling of speed fuzzy target robust detection problem based on cognitive information;S4, transmission and Doppler filter bank robust joint design problem solution.The application proposes a kind of for speed fuzzy target robust detection under clutter background transceiver joint design method, based on block enhancement, principal component minimization and sequence convex approximation etc. Non-convex optimization method, efficient configuration intra-pulse inter-pulse waveform amplitude, phase and timing etc. Parameters and Doppler filter bank coefficient, maximize the worst signal-to-interference-and-noise ratio of speed fuzzy target, realize the robust detection of speed fuzzy target under clutter background.

Multi-Gigabit Ethernet communication over shielded cables have challenging electromagnetic compatibility (EMC) and electromagnetic interference (EMI) problems. Circuitry on-board Ethernet physical layer (PHY) transceivers cannot adequately address these problems. In some cases, some circuitry may pose constraints on the transceiver design, making these problems more difficult to address. To improve EMC and increase tolerance to EMI, an improved shielded cable can be used to connect Ethernet PHY transceivers. In particular, a microwave-absorbing material is added to wrap one or more segments of the shielded cable. The microwave-absorbing material can be applied at or near the cable connectors attached to the ends of the shielded cable. One or more parameters of the microwave-absorbing material can be chosen or optimized for a particular type of shielded cable and sensitivity of the Ethernet PHY transceiver to EMC and EMI problems.

A novel radar signal processing system based on transmit-receive end design and electromagnetic original domain processing integrates transmit-receive end optimization design and electromagnetic original domain processing technology, and comprises a radar transmitting end module, a radar receiving end module and an electromagnetic original domain processing module. Through the design of a radar receiving and transmitting end, the information entropy contained in a radar echo signal set is increased, an electromagnetic original domain processing algorithm is utilized, the echo signal set received by a radar is directly processed in an electromagnetic original domain, and the radar function is achieved. According to the method, the current typical radar signal processing flow is simplified, the hardware complexity and the processing time delay can be reduced, and the method has universality and can realize multiple radar functions in a complex scene. Based on the novel radar signal processing normal form provided by the invention, the current radar system can be renovated, and the method has important significance for improving the performance of an electronic information system and maintaining the national safety.

This invention discloses a single-ended broadband variable gain amplifier and an optical transceiver system, relating to the field of optical transceiver design technology. The single-ended broadband variable gain amplifier includes a power supply terminal, an input port, an output port, multiple transconductance circuits, and multiple source degradation networks. The input port receives a single-ended input voltage signal. By setting multiple parallel-connected transconductance circuits and source degradation networks corresponding one-to-one with each transconductance circuit, each source degradation network can independently control the electrical connection state between the source of its corresponding transconductance circuit and the power supply and ground terminals, thereby adjusting the magnitude of the output current of each transconductance circuit. This, in turn, changes the total current superimposed on the output port by multiple transconductance circuits, achieving variable gain adjustment. The technical solution provided by this invention can solve the technical problems of existing single-ended broadband variable gain amplifiers, such as poor bandwidth consistency during gain adjustment, severe bandwidth limitation due to high-frequency parasitic capacitance, and high power consumption of differential structures, which is detrimental to single-ended signal reception.