Research Of Wireless Network Autonomous Positioning Performance Optimizing

Following the progress of 3G,3.5G(Wimax),4G(LTE, Long Time Evaluation), wireless network supply various service. Wireless Network Positioning Services attract much attention from service supplier. But, most of Wireless Network Positioning technique is lack of systematic ,autonomous,and adaptability. it is difficult to implement and popular for Wireless Network Positioning because of complexite, cost, error. It is impossible to compete with GPS positioning. So, this thesis put forward wireless network autonomous Positioning and several optimizing strategies.Wireless network autonomous positioning not only fulfill whole work of location, including original data pretreatment, positioning results, position optimizing, But also gave little burden to other equipment in the network.The performance in wireless network autonomous positioning mainly include postioning precision and timing. to progress postioning precision,the thesis analyze the nonlinear feature of positioning environment, then suggest pretreating original data to abstract parameter of noise in the communication channel, adjusting linear positioning estimation equation with a nonliear parameter. During implementing, the thesis developed adaptbility of positioning process in many filed, including using Kalman filter to adjust parameter of communication.,using probability density function(PDF) to judge the exist of nonlight of sight(NLOS) and give a compensate; using least squares(LS) figure out the mobile position from redundant equation of distance; repeating a estimation process. these approach improved the precision of position estimation. To reach the timing aim, divide the correlation variable to some group for a shorter time cost while keep some precision of estimation and fast sought the peek of value of correlation equation with optimum family genetic algorithm(OFGA)。Wireless network autonomous positioning systme's hardware and software structure is consist of some modules, making for convenience of adjustment aftertime; The thesis introduced the implement flow on mobile station,base station and core net. The thesis explained the modules about algorithm,control, communication,radio,while setting out some hardware schematic,at same time, show the fuction modules about algorithm, operating sysem, interfance, and high-level application and illuminating several frame block and resource code.Wireless network autonomous positioning increase the systematic adaptability. The module structure of hardware and software is in favor of shorting cast,improving precision,timing, reliability and convenientment for installing on mobile station, base station, or core net in the wireless network. All this will accelerate the wireless network position being used broadly and development of positioning chip, and will bring up a strong competitor of GPS location in the future.