CAJ | 학술논문

为了解决双曲调频二进制正交键控调制体系速率过低的问题，在传统二进制双曲调频率键控的基础上，提出了基于频带划分的制式级联啁啾率键控调制方法。这种调制方法用多进制频率键控来选通频段，在每个子频段内采用啁啾率键控解调模块，在解调端用快速傅里叶变换( FFT)和匹配滤波器代替分数阶傅里叶变换实现解调，从而大大减少了系统计算量。通过仿真及水池实验，验证了所提出的通信方法在水声通信中的抗噪性能与抗多径性能。实验结果表明，误码率控制在10-3数量级以下，具有一定的实用性。
위료해결쌍곡조빈이진제정교건공조제체계속솔과저적문제，재전통이진제쌍곡조빈솔건공적기출상，제출료기우빈대화분적제식급련조추솔건공조제방법。저충조제방법용다진제빈솔건공래선통빈단，재매개자빈단내채용조추솔건공해조모괴，재해조단용쾌속부리협변환( FFT)화필배려파기대체분수계부리협변환실현해조，종이대대감소료계통계산량。통과방진급수지실험，험증료소제출적통신방법재수성통신중적항조성능여항다경성능。실험결과표명，오마솔공제재10-3수량급이하，구유일정적실용성。
To solve the problem that the rate of HFM BOK modulation system is too slow, on the basis of the tradi-tional binary hyperbolic frequency modulated( HFM) rate keying, this paper proposed standard cascade HFM rate keying modulation method based on frequency bands allocation. This modulation method uses multiple frequency shift keying to choose frequency band, adopts HFM rate keying demodulation module in every sub-band, and utili-zes FFT and matched filter instead of FRFT to realize demodulation, so that it can decreases the calculation of the system largely. Through simulation and pool experiment, the proposed communication method has anti-noise and anti-multipath performance in underwater acoustic communication. Experimental results show that the bit error rate can be controlled below with a certain practicality.