CAJ | 학술논문

差分跳频（DFH）中用户数据对频率选择的约束性较弱。对此提出一种卷积编码的多序列跳频（CC-MSFH）系统，无需对发送信号进行调制，长度为N的编码数据分组从一簇2N个正交跳频序列中选出某个序列，并在该序列的当前频率上发送单频信号。相比DFH，CC-MSFH保持了信号健壮性，又使发送频率受跳频序列的强约束，因此，可以采用窄带接收来抑制异频干扰。计算和分析表明，在瑞利衰落信道中，CC-MSFH能够有效对抗部分频带干扰，在小信干比下误码率明显低于DFH。
차분도빈（DFH）중용호수거대빈솔선택적약속성교약。대차제출일충권적편마적다서렬도빈（CC-MSFH）계통，무수대발송신호진행조제，장도위N적편마수거분조종일족2N개정교도빈서렬중선출모개서렬，병재해서렬적당전빈솔상발송단빈신호。상비DFH，CC-MSFH보지료신호건장성，우사발송빈솔수도빈서렬적강약속，인차，가이채용착대접수래억제이빈간우。계산화분석표명，재서리쇠락신도중，CC-MSFH능구유효대항부분빈대간우，재소신간비하오마솔명현저우DFH。
In the differential frequency hopping (DFH),the frequency selection in one hop is constrained by bits blocks in an actually loose way. To solve this,a novel convolutional-coded multi-sequence frequency hopping(CC-MSFH)system was proposed. In CC-MSFH,there is also no need to modulate the transmitted signal. A coded bits block of length N selected one hopping pattern from a bunch of 2N orthogonal hopping patterns,and a sinusoidal wave at the current frequency of the selected pattern is transmitted directly. By this means signals of CC-MSFH maintained robustness as of DFH, while frequency selection in CC-MSFH is additionally constrained more tightly by the hopping patterns. Hereby a narrow band receiver is applicable,so the system can be simplified and reject the out-band jamming more efficiently. Calculation and analysis indicates that CC-MSFH can rejected the partial-band jamming efficiently over Rayleigh fading channels. It has a significantly lower BER than DFH under low SJR.