The software system structure design and routing protocol design of vehicle-carried broadcasting station, which is the node of wireless mobile Ad hoc network, are studied in detail in this dissertation. The SDSR, which is suitable for the vehicle-carried broadcasting station network is designed according to the DSR routing protocol.
Efficiently implemented in field programmable gate arrays (FPGA), the generator prototype of the proposed sequence has been realized and incorporated into fast FH radio.
In this method, 2-D feature information was constituted by using radio frequency and time-of-arrival, which analyzed the feature of radar pulse sequences for the very first time by employing structure function and empirical mode decomposition.
The experiment shows that the method can efficiently extract the frequency of a period-change radio frequency signal in a complex pulses environment and reveals a new feature for the signal sorting of interleaved radar pulse serial.
The Doppler spectral broadening resulted from non-stationary movement of target and radio-frequency interference will decrease the veracity of target detection by high frequency ground wave (HFGW) radar.
The results indicate that the preprocessing not only makes the system acquire a higher ability of target detection but also suppresses the radio frequency interference by 6-7 dB.
The effect was observed as an enhancement of the received signals by a factor of ～1.2, a factor of ～1.4 increase in the number of atmospherics, and a change in the radio station phase values.
We study the power-assignment problem in radio networks, where each radio station can transmit in one of two possible power levels, corresponding to two ranges-short and long.
An extremely complex outburst, part of which showed unsually rapid intensity fluctuations of a few second interval, was observed on 1970 November 5 with the 160 MHz interferometer of the Nobeyama Solar Radio Station.
A radio station, 930 CJCA, in Edmonton, Alberta, Canada aired five consecutive 1 1/2 hour open-line programs in which several aspects of heart disease were addressed by health experts.
The intervention consisted of placing actual self-help groups on a 50,000 watt radio station.
The result proves that the mobile station of WCDMA cannot provide the required transmitting power on the specified frequency band and data rate, and the symmetrical capacity in an up-downlink cannot meet the requirement of a mobile Internet.
To make RMAC fit WSN better, we designed an easy and efficient routing protocol base station flooding (BSF) and then integrated it with a MAC protocol timing out MAC (TMAC) , while traditionally BSF and TMAC work separately at two layers.
Zoning by Functions of Small-Scale Forest Ecosystems: A Case Study of Hui-Sun Forest Station in Taiwan Province, China
Based on the result and extensive risk communications, combined with the management experience of the Beijing Forest Protection Station, the authors proposed some effective control measures to prevent the invasion of the three pests into Beijing.
The total station was used to sample the relative coordinates data at four corners of the temporary sample plot and of each tree in the field.