frequency diversity造句
1, The frequency diversity spread spectrum multiple access (FD/SSMA) is a new spread spectrum system, which is based on the theory of parallel data transmission.
2, Although the additional frequency diversity gain can be attained, by using efficient detection techniques, the performance of OFDM-CDM system is better than that of conventional OFDM.
3, Moreover the combined performance of frequency diversity and time diversity can be gained by using time-frequency RAKE receiver.
4, Usually, frequency diversity and space diversity techniques are used to mitigate the fading in acoustic communication systems.
5, How to retrieve transmitted signals from received signals concerned with frequency diversity and equalization.
6, Results show that MC-CDMA system with array antennas has the best performance because of frequency diversity and space diversity.
7, At the same time, to achieve space, time and frequency diversity, some research is done on STF technology, which joints transmit diversity and OFDM technology.
8, The method and apparatus comprises transmitting a packet and a redundant packet according to spatial, time and frequency diversity to enhance the redundancy error processing.
9, Simulation testifies that within a certain range the method is a good way of filling blind zone for ground-based radar by adopting frequency diversity in the case of multipath.
10, This method is suitable for identifying PRF jittering, PRF staggering, frequency agility and frequency diversity etc.
11, MIMO-OFDM utilizes STC or SFC (Space-Frequency Code) to introduce the frequency diversity, so better performance will be achieved in the frequency selective fading channels.
12, This system can utilize the transmission bandwidth more efficiently and achieve frequency diversity.
13, The space diversity provided by space -time block coding and the inherent frequency diversity of MC - CDMA can be used together to combat fading effectively.
14, The proposed method reduces the PAPR to a certain extent and exploits large frequency diversity gains by CI spreading.
15, This provided advance study and brought forward the high removes resolution and frequency diversity.
16, Diversity is an efficient way to improve communication reliability, which can be generally classified as spatial diversity, frequency diversity and time diversity.
17, In error-rate expression the effects of Rayleigh fading, frequency-and time-selective fading on HF ionospheric channels, quadruple frequency diversity and white noise have been considered.