3results about How to "Increase power gain" patented technology

The application discloses a beamforming method of a holographic MIMO antenna array based on a steering vector, and under the condition that a user end position is unknown, multiple code words are constructed based on the steering vector through the combination of the pitch angle and the azimuth angle of the user end relative to the antenna array, a code word with the maximum gain of a receiving end is selected from the code words according to the feedback of the user end, and the code word is used as the optimal transmitting or receiving coefficient of the antenna array. The user end only needs to feed back the corresponding information in sequence, the requirement for the feedback time delay is slightly low, the error code of the feedback information has a certain fault tolerance, the time complexity is relatively low compared with the exhaustive search method, the performance is good, the outdoor channel changing rapidly can be well responded, the robustness to the channel fluctuation is higher, and the overall power gain is improved. Moreover, under the condition that the user end position is known, the transmitting or receiving coefficient of the antenna array can be directly determined.

This invention belongs to the field of wireless communication technology and relates to amplifiers in wireless communication systems. Specifically, it provides a gain boost amplifier with Z-type and PreY-type LLRENs, including: a transistor M1, a Z-type LLREN, and an input PreY-type LLREN and / or an output PreY-type LLREN. The input PreY-type LLREN is connected between the input terminal of transistor M1 and the common ground terminal, the output PreY-type LLREN is connected between the output terminal of transistor M1 and the common ground terminal, and the Z-type LLREN is connected between the common ground terminal of transistor M1 and ground. This invention, through its gain boost structure design based on Z-type and PreY-type LLRENs, avoids many problems associated with Y-type LLRENs. That is, this invention effectively maximizes the usable gain G without using the Y-type LLREN. ma Increase to the corresponding upper limit value G ma_upper_limit This means effectively increasing the power gain of the amplifier.

This invention discloses a distributed beamforming method, system, and apparatus for low-Earth orbit satellites, comprising: acquiring ground user location information and satellites to be communicated with; calculating the transmission paths between multiple satellites and ground users and obtaining the superimposed signal of electromagnetic waves at the ground end; calculating the superimposed power distribution of the ground electromagnetic waves based on the superimposed signal; constructing an objective function that maximizes the average received power of all ground users and the fairness of ground users based on the calculated superimposed power distribution of the ground electromagnetic waves; calculating the optimal satellite and its corresponding initial transmission phase within the selectable set, indirectly controlling the transmission distance from the satellite to the ground end to control the final phase of the electromagnetic waves received by the receiver, thereby maximizing the overall power gain of multiple ground receiving terminals and the fairness among each individual ground user, providing ideal power gain regardless of the location of the ground user, and simultaneously covering multiple users.