shortwave communication plays a vital role in long haul communications, on account of its unique merits such as low cost, convenience to be generated and strong resistance to damage 短波通信具有成本低、架設(shè)靈活、抗毀能力強(qiáng)等優(yōu)點(diǎn),在遠(yuǎn)距離通信中起著舉足輕重的作用。
in modern shortwave communication, the length of signal existence time in single channel is very short for reducing the probability of being intercepted, thus the difficulty of signal detection and extraction increased 摘要在現(xiàn)代短波通信中,作為低截獲率通信手段之一,單個(gè)信道內(nèi)信號(hào)持續(xù)時(shí)間大大縮短,從而增加了信號(hào)檢測(cè)與提取的難度。
the physical simulation of shortwave channel enables researchers to simulate particular channel environment in the lab, which is beneficial to the research and test of shortwave communication system . thus it has marvelous value of application 短波信道的物理仿真,使人們可以在實(shí)驗(yàn)室里仿真特定的信道環(huán)境,從而有助于短波通信系統(tǒng)的研究和測(cè)試,具有重要的應(yīng)用價(jià)值。
this paper researches the integrating application of adaptive antenna array technology, spread-spectrum communication technology and transform-domain filter technology in shortwave communication area, basing on the background of improving on the shortwave communication equipments being used in chinese army, and all the key techniques mentioned above are implemented in a single fpga chip 本文以改造我軍現(xiàn)役短波通信設(shè)備為背景,研究了自適應(yīng)天線陣技術(shù)、擴(kuò)頻通信技術(shù)、變換域?yàn)V波技術(shù)等多種現(xiàn)代數(shù)字信號(hào)處理技術(shù)在短波通信中的綜合應(yīng)用,并以單片超大規(guī)模fpga芯片為硬件處理平臺(tái),對(duì)系統(tǒng)中的關(guān)鍵技術(shù)進(jìn)行了設(shè)計(jì)與實(shí)現(xiàn)。
this paper researches the integrating application of adaptive antenna array technology, spread-spectrum communication technology and transform-domain filter technology in shortwave communication area, basing on the background of improving on the shortwave communication equipments being used in chinese army, and all the key techniques mentioned above are implemented in a single fpga chip 本文以改造我軍現(xiàn)役短波通信設(shè)備為背景,研究了自適應(yīng)天線陣技術(shù)、擴(kuò)頻通信技術(shù)、變換域?yàn)V波技術(shù)等多種現(xiàn)代數(shù)字信號(hào)處理技術(shù)在短波通信中的綜合應(yīng)用,并以單片超大規(guī)模fpga芯片為硬件處理平臺(tái),對(duì)系統(tǒng)中的關(guān)鍵技術(shù)進(jìn)行了設(shè)計(jì)與實(shí)現(xiàn)。