34results about How to "Increase the number of bits" patented technology

The disclosure relates to a method and device for processing PBCH bandwidth, a base station, and a computer-readable storage medium. Wherein, the processing method of the PBCH bandwidth includes: judging whether the current frequency band is a preset type frequency band, wherein, the preset type frequency band can use two kinds of subcarrier spacing SCS; if the current frequency band is a preset type frequency band, then reducing The number of PBCH information bits contained in the load and the number of resource elements RE occupied by the demodulation reference signal DMRS in the synchronization signal block SSB corresponding to the current frequency band remain unchanged, or the number of PBCH information bits contained in the load in the PBCH corresponding to the current frequency band remains unchanged. Change and reduce the number of REs occupied by DMRS in the SSB corresponding to the current frequency band. The embodiments of the present disclosure can solve the problem that the UE takes too long to search for the synchronization signal.

The invention discloses a non-destructive hidden transmission method for on-board data. The method comprises the following steps of: embedding low-speed data in an original high-speed remote sensing carrier image by modifying the adjacent-pixel difference histogram of the on-board high-speed remote sensing carrier image, and performing downlink transmission by virtue of a satellite high-speed data transmission system. A ground receiving end can correctly extract the low-speed data from the carrier image, and recover the original high-speed remote sensing carrier image in a non-destructive manner. According to the method disclosed by the invention, the utilization rate of a satellite data transmission system is increased and the hidden performance of on-board data transmission is enhanced on the premise of no increase of the complexity and the information transmission speed of the satellite data transmission system. Experimental results indicate that a high pure load embedding capacity in case of ensuring a good hidden performance can be obtained according to the method disclosed by the invention.

The invention discloses an optimization method of ABR video coding code rate control. The method comprises quantification parameter optimization steps for a current coding frame as follows: obtaining coding information of a coded frame; obtaining an actual code rate of the current coding frame and a quantification parameter of the current coding frame according to the coded frame information; obtaining a code rate control error of the current coding frame; and adjusting the quantification parameter of the current coding frame that whether the code rate control error of the current coding frame is less than a set error is determined, if the code rate control error of the current coding frame is less than the set error, whether the current coding frame is a key frame is determined, if the current coding frame is the key frame, the quantification parameter is reduced in an error scope, and the bit number of the current coding frame is increased, if the current coding frame is not the key frame, the quantification parameter is increased in the error scope, and the bit number of the current coding frame is reduced, and, if the code rate control error of the current coding frame is greater than or equal to the set error, the optimization steps of the quantification parameter of the current coding frame are ended. The method can effectively reduce the code rate control error.

The invention discloses a time-frequency pulse-shaping based time-delay multi-carriers modulation and demodulation method. The method is characterized in that a plurality of periodic symbol waveformscapable of carrying information are formed at a sending end; the symbol waveform is formed by H wavelets, a starting point of each wavelet is required to be placed in the lifetime of a first wavelet,and the symbol waveform is obtained by linear superposition after the starting points of the wavelets sequentially move from the starting point of the symbol waveform for a certain time period calleda time delay, wherein the wavelets refer to fundamental waves carrying the information, the fundamental waves comprise waveforms of three intervals, namely a front pulse information wave at an interval Tthetai1, a main wave without the information in an interval tthetai2 and a back pulse information wave in an interval Tthetai3; and the received symbol waveform is balanced, amplitude information of the information carried by the balanced symbol waveform is solved in each front and back pulse information wave interfaces in sequence, and then the amplitude information is converted into a binarynumber to complete a signal demodulation process at the receiving end. The method has the characteristics of higher transmission efficiency, lower demodulation complexity and the like.

The invention provides a power optimization method for a full duplex bidirectional relay system under asymmetrical speeds. The method comprises the following steps: step 1, a full duplex bidirectional relay communication system is established, and power distribution factors are initialized; step 2, state information of each node is measured, and the state information includes power of reception and transmission of each node, self-interference information of each node and channel coefficients during data exchange between the nodes; step 3, whether the power distribution factors need to be adjusted is determined according to the state information of the nodes and values of the power distribution factors, and the values of the power distribution factors are adjusted according to the determination result until an overall speed sum of the full duplex bidirectional relay communication system is the maximum; and step 4, power resources are distributed according to a power distribution scheme when the overall speed sum is the maximum. According to the invention, a relay cooperation communication mechanism in a full duplex mode is established; time slot cost is reduced; and the system throughput and transmission efficiency are increased.