CAJ | 학술논문

提出一种针对多波带正交频分复用系统中载波频偏与采样频偏的联合估计算法。为了在频偏较小时获得对噪声干扰足够的鲁棒性，用预偏转技术把频偏预旋转到一个较大的值作估计。该算法在频域处理3个连续相同的前导符，它对频率相关性I/Q失配和频率无关性I/Q失配都具有很好的鲁棒性。基于多波带正交频分复用超宽带无线传输系统的仿真结果，验证了提出的载波频偏和采样频偏联合估计算法的有效性。
제출일충침대다파대정교빈분복용계통중재파빈편여채양빈편적연합고계산법。위료재빈편교소시획득대조성간우족구적로봉성，용예편전기술파빈편예선전도일개교대적치작고계。해산법재빈역처리3개련속상동적전도부，타대빈솔상관성I/Q실배화빈솔무관성I/Q실배도구유흔호적로봉성。기우다파대정교빈분복용초관대무선전수계통적방진결과，험증료제출적재파빈편화채양빈편연합고계산법적유효성。
This paper presents a joint Carrier Frequency Offset(CFO)and Sampling Frequency Offset(SFO)estimation algorithm targeting the wideband Orthogonal Frequency Division Multiplexing(OFDM)systems. In order to acquire robust-ness against the disturbance of noise when frequency offset is small, pre-biasing method is used to shift the frequency off-set amount to a larger value. Utilizing 3 consecutive preambles and processing them at frequency domain, the algorithm is robust to both Frequency Independent(F-I)and Frequency Dependent(F-D)I/Q Mismatch(I/Q-M). Simulations based on multi-band OFDM ultra-wideband system are conducted to verify the effectiveness of this proposed method.