Abstract: The present disclosure provides a local oscillator signal generation circuit and generation method and a wireless communication system. The local oscillator signal generation circuit includes an oscillator configured to generate a differential clock signal with a duty cycle of 50%; and a frequency divider connected to an output end of the oscillator and configured to perform half-integer frequency division on the differential clock signal and use a signal after the half-integer frequency division as a local oscillator signal. The present disclosure performs the half-integer frequency division on the clock signal output by the oscillator, and uses the signal as the local oscillator signal to participate in mixing, so that the frequency of the oscillator can avoid the frequency of the high-power device, thereby reducing frequency pulling of the clock signal output by the oscillator and reducing noise.

Abstract: The present application provides a signal transmission method based on random unitary coding modulation and cross-domain iterative detection, including random unitary coding modulation at a signal transmitting end and cross-domain iterative detection at a receiving end. The random unitary coding modulation includes random unitary modulation or random unitary precoding, utilizing random unitary transformations to ensure that an equivalent channel matrix satisfies the correct right unitary invariance assumption. The cross-domain iterative detection includes using a cross-domain iterative receiver to receive a signal obtained after the random unitary coding modulation. The random unitary coding modulation ensures that general OAMP/VAMP, UAMP, and MAMP-type receivers achieve Bayesian optimal performance. The cross-domain iterative detection allows, through cross-domain detection, the receiver to utilize ultra-sparse time-domain channels, including low-complexity MAMP, OAMP/VAMP, and UAMP-type receivers.

Abstract: A nanoscale drug carrier capable of crossing the blood-brain barrier. Said carrier can target brain lesions (brain tumors or other neurodegenerative diseases). The targeting drug carrier capable of crossing the blood-brain barrier comprises all-heavy-chain human ferritin or a functional fragments reconstituted structure or a mutant thereof. The manner for crossing the blood-brain barrier of the drug carrier is receptor-mediated transcytosis. The drug carrier provides an effective nanoscale drug carrier for the treatment of brain tumors or other neurodegenerative diseases.

Abstract: A nanoscale drug carrier capable of crossing the blood-brain barrier. Said carrier can target brain lesions (brain tumors or other neurodegenerative diseases). The targeting drug carrier capable of crossing the blood-brain barrier comprises all-heavy-chain human ferritin or a functional fragments reconstituted structure or a mutant thereof. The manner for crossing the blood-brain barrier of the drug carrier is receptor-mediated transcytosis. The drug carrier provides an effective nanoscale drug carrier for the treatment of brain tumors or other neurodegenerative diseases.