| 1. | Frequency selective fading
频率选择性衰落色散衰落 |
| 2. | Because of the different time delay among multi - paths , the received signal undergoes frequency - selective fading
由于多径干扰之间具有不同的时间延迟，接收信号将承受频率选择性衰落。 |
| 3. | After theoretical analysis , we analysis and compare the efficiency and feasibility of these algorithms with matlab software simulation
Bws易受频率选择性衰落及多径环境影响,从而导致系统的性能下降。 |
| 4. | It combines the advantages of ofdm and cdma . it can convert the frequency selective channel propagation of the broadband to flat channel of the subcarrier
它结合了ofdm和cdma技术的优点，能够把宽带频率选择性衰落转化为每子载波的平坦信道。 |
| 5. | New generation broadband wireless communications should be able to provide reliable high - data - rate transmissions in time and frequency selective wireless channel
新一代无线通信系统应能在时间?频率选择性衰落信道中提供优质可靠的数据传输服务。 |
| 6. | Subsequently the channel was modeled for three types namely additive white gaussian noise , flat fading and frequency selective fading . lastly , the receiver was studied
接下来信道建模成三种不同的类型，即加性高斯白噪声信道、平坦衰落信道和频率选择性衰落信道。 |
| 7. | But when the bit rate is above 1 mbps , the signal suffers frequency select fading , which causes the serious intersymbol interference ( isi ) . increasing the system power can ’ t reduce the ber
但是当码速率提高到1mbps以上时,信号受到频率选择性衰落,码间干扰严重,增大系统功率也不能降低系统误码率。 |
| 8. | In wireless digital transmissions , due to the delay dispersion of the transmitted symbols and the limitation of channel bandwidth , the channel may induce inter - symbol interference ( isi ) , which results the frequency selective fading
在无线数字传输中，由于时延扩展和信道带宽限制，引起码间串扰，产生频率选择性衰落。 |
| 9. | Frequency - selective fading due to multipath propagation is a big obstacle in wireless communication . in the condition , the intersymbol interference ( isi ) comes into being and communication system appears error received symbol
多径传输效应引起的频率选择性衰落是无线通信的一大障碍,使接收信号产生码间干扰( isi ) ,导致通信系统出现误码。 |
| 10. | The problems of carrier frequency offset estimation under the condition of the agwn channel , frequency flat - fading channel and frequency selective - fading channel are studied in detail respectively
本文仔细研究了在高斯白噪声信道下、频率平坦衰落信道下和频率选择性衰落信道下高精度估计信号载频偏差的问题，并对相应算法提出了一些改进办法。 |
