A struggling U. S. economy is not getting any help from the battered hf using market.
美国房屋市场萎靡不振给美国困境中的经济雪上加霜。
G function arithmetic of a HF high speed FH CHESS radio produced in U. S. is deeply studied in this paper, which involves FH pattern and the modulation and demodulation etc.
本文深入研究了美国推出的短波高速跳频CHESS电台的G函数算法，涉及到跳频图案、信息调制与解调等。
G function arithmetic of a HF high speed FH CHESS radio produced in U. S. is deeply studied in this paper, which involves FH pattern and the modulation and demodulation etc.
本文深入研究了美国推出的短波高速跳频CHESS电台的G函数算法，涉及到跳频图案、信息调制与解调等。
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