Bit and power allocation method for fast optimizing OFDM system

A bit and power allocation method for fast optimizing OFDM system relates to the wireless communication field. The method solves the problem that system optimization time is long as the allocation complexity is high in the existing bit and power allocation method. The method includes that: bit and power of N subcarriers in an OFDM system are initialized; power increment required by increasing message of one bit of each subcarrier in the N subcarriers is calculated; RT/6 subcarriers with less power increment are found and 2 bits are allocated to each subcarrier; bit number to be allocated RT is updated and allocation is continued until bit allocation is completed, and then power allocation is carried out. The invention is applicable to bit allocation and transmitting power optimization.

Binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation

The invention relates to a wireless communication system, in particular to a binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation. To a certThe invention relates to a wireless communication system, in particular to a binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation. To a certain extent, the invention overcomes the defects of the prior OFDM system which has a higher peak to average power ratio and is greatly influenced by frequency offset. The invention comprises a launchiain extent, the invention overcomes the defects of the prior OFDM system which has a higher peak to average power ratio and is greatly influenced by frequency offset. The invention comprises a launching process: an input signal is converted by a first serial-parallel conversion module and input to a BPSK data modulator to be modulated; the modulated signal passes through a Haar wavelet forward trang ...

Storing box door

The invention discloses a storing box door, comprising a door leaf body; a ceramics painting decorated board is arranged on the door leaf body. Because the ceramics raw material used in the ceramics decorated board is made by high temperature burning, a painting which is baked on the decorated board has high strength and hardness, good anti aging property, non-fading and non-falling and long service life.

Image testing method for fabric dynamic and static drapability and testing apparatus thereof

Method based on cause-and-effect relation of variables for diagnosing failures in process industry

The invention discloses a method based on the cause-and-effect relation of variables for diagnosing failures in the process industry. The method comprises the following steps: a human-computer interaction module inputs the description equations and type of the production process into a system; a variable cause-and-effect relation generating module generates a process variable cause-and-effect relation model according to the inputted equations and variables of the system, generates the failure matching rules on the basis of the process variable cause-and-effect relation model and stores the rules in a failure rule library in a relational database form; a variable state information acquisition module extracts the variable state information in a production process DCS (distributed control system) or a production monitoring real-time database, calculates the variable qualitative state discriminant parameter and sends the calculation result to a failure searching module; and the failure searching ...

Game device positioning method

The invention discloses a positioning method for a game device, which is applied to a game system. The positioning method is as follows: a positioning hose in the game system sends out a positioning signal and starts timing; a wireless controller in the game system sends out an ultrasonic signal after receiving the positioning signal; the positioning host stops timing after receiving the ultrasonic signal and computes out transfer time of the ultrasonic wave; the positioning host transmits the transfer time of the ultrasonic wave to a computing host in the game system; the computing host computes out the distance between the wireless controller and the positioning host according to the transfer time of the ultrasonic wave; and the computing host computes the position of the wireless controller according to the distance. Therefore, the positioning method for the game device has the advantages of simple operation, low requirement on hardware, little environmental interference, and the like ...

Bit and power allocation method for fast optimizing OFDM system

A bit and power allocation method for fast optimizing OFDM system relates to the wireless communication field. The method solves the problem that system optimization time is long as the allocation complexity is high in the existing bit and power allocation method. The method includes that: bit and power of N subcarriers in an OFDM system are initialized; power increment required by increasing message of one bit of each subcarrier in the N subcarriers is calculated; RT/6 subcarriers with less power increment are found and 2 bits are allocated to each subcarrier; bit number to be allocated RT is updated and allocation is continued until bit allocation is completed, and then power allocation is carried out. The invention is applicable to bit allocation and transmitting power optimization.

Game device positioning method

The invention discloses a positioning method for a game device, which is applied to a game system. The positioning method is as follows: a positioning hose in the game system sends out a positioning signal and starts timing; a wireless controller in the game system sends out an ultrasonic signal after receiving the positioning signal; the positioning host stops timing after receiving the ultrasonic signal and computes out transfer time of the ultrasonic wave; the positioning host transmits the transfer time of the ultrasonic wave to a computing host in the game system; the computing host computes out the distance between the wireless controller and the positioning host according to the transfer time of the ultrasonic wave; and the computing host computes the position of the wireless controller according to the distance. Therefore, the positioning method for the game device has the advantages of simple operation, low requirement on hardware, little environmental interference, and the like ...

Automatic memory control method and automatic memory system thereof

The invention discloses an automatic memory control method and an automatic memory system thereof, which has simple control method, is easy to be executed, and can automatically identify and control the access and avoids the access error. The automatic memory control method comprises the following steps of: automatically identifying an electronic card by a control system and a card reader, thus realizing automatic memory control of the memory system. The automatic memory system comprises a memory frame which consists of memory boxes with electronic locks and is provided with a speech and caption prompter, and the control system consisting of a local area network exchanger, a computer, a controller and the card reader that are connected with each other; and the electronic lock and the speech and caption prompter are connected with the controller.

Method based on cause-and-effect relation of variables for diagnosing failures in process industry

The invention discloses a method based on the cause-and-effect relation of variables for diagnosing failures in the process industry. The method comprises the following steps: a human-computer interaction module inputs the description equations and type of the production process into a system; a variable cause-and-effect relation generating module generates a process variable cause-and-effect relation model according to the inputted equations and variables of the system, generates the failure matching rules on the basis of the process variable cause-and-effect relation model and stores the rules in a failure rule library in a relational database form; a variable state information acquisition module extracts the variable state information in a production process DCS (distributed control system) or a production monitoring real-time database, calculates the variable qualitative state discriminant parameter and sends the calculation result to a failure searching module; and the failure searching ...

Binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation

The invention relates to a wireless communication system, in particular to a binary phase-shift keying/orthogonal frequency division multiplexing system based on Haar wavelet transformation. To a certain extent, the invention overcomes the defects of the prior OFDM system which has a higher peak to average power ratio and is greatly influenced by frequency offset. The invention comprises a launching process: an input signal is converted by a first serial-parallel conversion module and input to a BPSK data modulator to be modulated; the modulated signal passes through a Haar wavelet forward transform module and is input to an IFFT converter; and the signal converted by the IFFT converter is input to the first parallel-serial conversion module, converted by the parallel-serial conversion module, inserted in a circulating prefix and launched by a channel. The invention also comprises a receiving process: the received signal is converted by a second serial-parallel conversion module and transferred ...