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火控系统中单信道传输多路模拟数字指令的实现
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作者 谭晖 《计算机测量与控制》 CSCD 2003年第11期873-874,共2页
传统的模拟指令和数字指令的无线传输采用不同的信道机分别传输。介绍了一种火控系统中两路模拟指令和四路数字指令合路无线传输的设计及实现方法 ,使得只用一个信道机就可完成多种多路指令的传输 ,具有较高的实用性和先进性 ,已在实际... 传统的模拟指令和数字指令的无线传输采用不同的信道机分别传输。介绍了一种火控系统中两路模拟指令和四路数字指令合路无线传输的设计及实现方法 ,使得只用一个信道机就可完成多种多路指令的传输 ,具有较高的实用性和先进性 ,已在实际型号设计中得到采用 ,效果良好 。 展开更多
关键词 火控系统 单信道传输 多路模拟数字指令 无线传输 无线信道
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Multi-Channel Iterative FDE for Single Carrier Block Transmission over Underwater Acoustic Channels 被引量:3
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作者 HE Chengbing HUO Siyu +2 位作者 ZHANG Qunfei WANG Han HUANG Jianguo 《China Communications》 SCIE CSCD 2015年第8期55-61,共7页
Recently, single carrier block transmission(SCBT) has received much attention in high-rate phase-coherent underwater acoustic communication.However,minimum-mean-square-error(MMSE) linear FDE may suffer performance los... Recently, single carrier block transmission(SCBT) has received much attention in high-rate phase-coherent underwater acoustic communication.However,minimum-mean-square-error(MMSE) linear FDE may suffer performance loss in the severely time dispersive underwater acoustic channel. To combat the channel distortion, a novel multi-channel receiver with maximum ratio combining and a low complex T/4 fractional iterative frequency domain equalization(FDE) is investigated to improve diversity gain and the bit error rate(BER) performance. The proposed method has been verified by the real data from a lake underwater acoustic communication test in November 2011. At 1.8 km, the useful data rates are around 1500 and 3000 bits/s for BPSK and QPSK respectively. The results show the improvements of system performance. Compared with MMSE FDE system, the output SNR improvement is 6.9 d B, and the BER is from 10-3 to no error bits for BPSK. The output SNR improvement is 5.3 d B, and the BER is from 1.91×10-2 to 2.2×10-4for QPSK. 展开更多
关键词 underwater acoustic communi-cation single carrier multi-channel frequency domain equalization iterative processing
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Ergodic Capacity Analysis of Spatially Modulated Systems
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作者 候永宏 王丕超 +2 位作者 向维 赵晓明 侯春萍 《China Communications》 SCIE CSCD 2013年第7期118-125,共8页
Spatial Modulation(SM) is a newlyintroduced wireless transmission scheme,andSpace Shift Keying(SSK) is its simplifiedversion.Their capacity performance has notbeen well examined to date.Starting frombasic definitions ... Spatial Modulation(SM) is a newlyintroduced wireless transmission scheme,andSpace Shift Keying(SSK) is its simplifiedversion.Their capacity performance has notbeen well examined to date.Starting frombasic definitions of information theory,through theoretical analyses and numericalcalculations,this paper evaluates the capacityof SM systems in various channels.Our conclusion is that under Rayleigh fading channels,the capacity of the SSK system is limited bythe Signal-to-Noise Ratio(SNR) or the number of transmit antennas,whichever one issmaller.From the capacity point of view,theSM system is better than the Single-Input andSingle-Output(SISO) system,but worse thanthe Multiple-Input and Single-Output(MISO)system.The correlation between transmit antennas will degrade the performance of theSSK system.Line-of-Sight(LOS) may causeperformance degradation for SSK,but capacity increases for SM. 展开更多
关键词 SSK SM channel capacity
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