CAJ | 학술논문

差分跳频(DFH)信号具有良好的抗多径衰落、抗干扰及高速数据传输能力，在短波和水声军事通信领域得到广泛应用。但是，在有限的传输带宽内差分跳频信号编码增益受限，特别是每跳携带多个比特时，该文提出一种压缩频谱DFH(CS-DFH)方法，可以在相同的比特每跳(BPH)和带宽下提高DFH信号的编码增益。对CS-DFH信号在莱斯(Rice)衰落信道下的误比特率(BER)理论上界进行了推导，并通过仿真验证。结果表明，莱斯信道中，在相同BPH、带宽条件下，与常规DFH相比，CS-DFH是一种可以获得更高BER增益的方法，特别是当莱斯因子K很小的时候。
차분도빈(DFH)신호구유량호적항다경쇠락、항간우급고속수거전수능력，재단파화수성군사통신영역득도엄범응용。단시，재유한적전수대관내차분도빈신호편마증익수한，특별시매도휴대다개비특시，해문제출일충압축빈보DFH(CS-DFH)방법，가이재상동적비특매도(BPH)화대관하제고DFH신호적편마증익。대CS-DFH신호재래사(Rice)쇠락신도하적오비특솔(BER)이론상계진행료추도，병통과방진험증。결과표명，래사신도중，재상동BPH、대관조건하，여상규DFH상비，CS-DFH시일충가이획득경고BER증익적방법，특별시당래사인자K흔소적시후。
Differential Frequency Hopping (DFH) signal can be used in the High Frequency (HF) and underwater acoustic communications because it has good resistance to multipath fading and jamming, at the same time with a high-speed data transmission capacity. However, taking into account the coding gain is limited within a finite transmission bandwidth, especially multiple Bit Per Hop (BPH), a Compressed Spectrum DFH (CS-DFH) method is proposed to increase the coding gain of DFH signal for the same BPH and bandwidth. This paper develops an upper bound on the Bit Error Rate (BER) of CS-DFH signal in Rician channel, and its tightness is proved by simulations. For the same BPH and bandwidth, the results indicate that the CS-DFH is an efficient mean for obtaining higher coding gain than the existing DFH over the Rician channel, especially when the Rician factorK is small.